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Biology Question Bank For Highschool | Heat Capacity | Electron

You have to take the two given statements to be true even if they seem to be at variance from commonly known facts and then decide which of the given conclusions ...... One function of the telomeres in a chromosome is to (a) 'seal' the ends of the chromosomes (b) start RNA synthesis (c) identify the correct member of the ...

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Very Similar SOLVE & SEND Get All India Rank MODEL TEST PAPER for AFMC 2007 Time: 2 hr s M a x i m u m M a r k s : 200 Instructions: 1. This question paper contains 200 questions: 50 questions of Physics, 50 of Chemistry, 50 of Biology and 50 of General Knowledge, Logical Reasoning & English. 2. For every correct answer 1 marks will be credited to your account, 1/4 mark will be deducted for every wrong answer and no marks will be awarded for unattempted questions. 3. Use of Trigonometric table, Calculator or any other helping device is restricted. 4. Useful data : At.wt./ Mol.wt. : K M n 0 4 : 158; Cu : 63.5; NaOH : 40; HC1: 36.5; Mg : 24; H : 1; He : 4; C : 12; N : 14; O : 16: Na : 23; P : 31; S : 32; CI : 35.5; Ca : 40; Zn : 65; Ag : 108. Atomic No : H : 1; He ; 2: Li : 3; Be : 4; B : 5, C : 6; N : 7; O : 8; F : 9; Na : 11: Mg : 12; A1 : 13; Si : 14; Fe : 26; Co : 27; Ni : 28; Cu : 29: Zn : 30: Rb : 37 C o n s t a n t s : g = 10m/s-. R = 8.3 J R - ' m o V or 0.0821 atm /K-'mol ', e = 1.6 x 10 m,~ 9.11 x 10-" kg. 5. Fill in your answers in the given response sheet. PHYSICS (c) 300 m/s 1. The unit of voltage is (a) joule/coulomb (b) joule (c) joule x coulomb (d) none of these 2. 6th (a) (c) If a body starts from rest and travels 120 cm in the second then what is the acceleration ? 0.20 m/s 2 (b) 0.027 m/s 2 0.218 m/s(d) 0.30 m/s 2 3. An J(4gR/3) object is projected with a velocity from earth. The velocity of the object, at the maximum height reached by it, will be (a) figR/3 (c) figR (b) JgR/3 (d) zero 4. Which of the following cannot be resultant of the vectors of magnitude 5 and 10 ? (a) 7 (b) 8 (c) 5 (d) 2 5. 5g is (a) (c) A force of 50 dynes is acting on a body of mass which is at rest, for an interval of 3 sec, then impulse 0.15 x K H Ns 1.5 x 10-3 Ns (b) 0.98 x 10~3 Ns (d) 2.5 x 10~3 Ns 6. A particle is projected with 200 m/s at an angle 60°. At highest point, it explodes into three particles of equal masses. One goes vertically upward with velocity of 100 m/s, second particle goes vertically downward with same velocity, then what is velocity of third one ? (a) 120 m/s (b) 100 m/s 38 ""'BIOLOGY TODAY | JANUARY '07 w C, N0 = 6.023 x 1 0 2 \ m,, = 1.6 x 1 0 2 7 kg. (d) 200 m/s 7. A wire suspended vertically from one of iis ends is stretched by attaching a weight of 200 N to the lower end. The weight stretches the wire by 1 mm. Then the elastic energy stored in the wire is (a) 0.2 J (b) 10 J (c) 20 J (d) 0.1 J 8. The initial angular velocity of a circular disc of mass M is a),. A small sphere of mass m is attached gently on edge of the disc. The final angular velocity of the disc will be (M + m) 0), (M+m)to, (b) (a) M m m M to, (0, (c) w (d) i M+m J~' {M+m 9. A bend in a level road has radius of 80 m. Find ihe maximum speed which a car turning the bend without skidding. (Given jj. = 0.25). (a) 24 m/s (b) 4 m/s (c) 14 m/s (d) 9.8 m/s 10, Moment of inertia of a uniform rod of length L and mass M, about an axis passing through LI4 from one end and perpendicular to its length is (a) (c) 11 ML48'"" 2 (b) 1-ML 48 ML (d) w ~Y2 11. W h o a m o n g the f o l l o w i n g gave first experimental value of G ? (a) Cavendish (b) Copernicus Ihe 37 (c) Brook Taylor (d) none of these (a) 7t/5 sec (b) 271 sec (c) 20n sec (d) 5tc sec 12. A simple pendulum has a time period T] when on the earth's surface, and T2 when taken to a height R above the earth's surface, where R is the radius of the earth. 21. A transverse wave is represented by the equation • 2n y = ^ 0 s i n — (vt-x) . For what value of A. the maximum The value of y particle velocity equal to two times the wave velocity? (a) \ = y0/2 (b) X = ny0 (c) X = 2y0 (d)X = V4 (a) 1 is (b) 72 (c) 4 (d)2 13. R.M.S. velocity of a gas is v at temperature T. If temperature is increased two times, then R.M.S. velocity becomes (a) 0.5 v (b) ,/2 v (c) v (d)3v 14. A ball is falling in a lake of depth 200 m shows decrease 0.1% in its volume at the bottom. What is the bulk modulus of the material of the ball ? (a) 19.6 x 10s N/m 2 (b) 19.6 x 10"10 N/m 2 2 (c) 19.6 x 10'° N/m (d) 19.6 x 10"8 N/m 2 15. A wooden cube first floats inside water when a 200 g mass is placed on it. When the mass is removed the cube is 2 cm above water level. The side of cube is (a) 5 cm (b) 10 cm (c) 15 cm (d) 20 cm 16. (a) (b) (c) (d) Rate of diffusion is faster in gases than in liquids and solids equal to solids, liquids and gases faster in liquids than in solids and gases faster in solids than in liquids and gases 17. For a gas, the difference between the two principal specific heats is 4150 J/kg K. What is the specific heat of the gas at constant volume if the ratio of specific heats is 1.4 ? (a) 5186 J/kg K (b) 10375 J/kg K (c) 1660 J/kg K (d) 8475 J/kg K 18. If a ball of 80 kg mass hits an ice cube and temperature of ball is 100°C, how much ice becomes water ? Specific heat of ball is 0.2 cal/gram °C. (a) 20 g (b) 2 g (c) 200 g (d) 20 x 103g 19. The time period of simple pendulum is doubled, when (a) the mass of the bob is doubled (b) its length is made four times (c) the mass of the bob and the length of pendulum is doubled (d) its length is doubled 20. The kinetic energy of a particle, executing S.H.M. is 16 J when it is in its mean position. If the amplitude of oscillations is 25 cm and the mass of the particle is 5.12 kg, the time period of its oscillation is 38 22. When two tuning forks A and B are sounded together, X beats/sec are heard. Frequency of A is n. Now when one prong of fork B is loaded with a little wax, the no. of beat/sec decreases. The frequency of fork B is (a) n + X (b )n-X (c) n - X2 (d) n - 2X 23. Putting a dielectric substance between two plates of a condenser, the capacity, potential and potential energy respectively (a) increases, decreases, decreases (b) decreases, increases, increases (c) increases, increases, increases (d) decreases, decreases, decreases 24. An a-particle and a proton are accelerated through same potential difference from rest. Find the ratio of their final velocity (a) 4 : 1 (b) 1 : 1 (c) (d) 1:72 1:2 25. A hollow metal sphere of radius 10 cm is charged such that the potential on its surface is 80 V. The potential at the centre of the sphere is (a) zero (b) 80 V (c) 800 V (d) 8 V 26. If there are n capacitors in parallel connected to V volt source, then energy stored is equal to (a) CV (b) CV2 (c) 27. (a) (b) (c) (d) 2n cv- (d) Ucv 2 2 In fig. the current passing through 6 Q resistor is 0.4 A 6 £2 — W W , 0.48 A 1.2 A 0.72 A 4£2 1 0.80 A —WW 28. A 100 W, 200 V bulb is connected to a 160 volt supply. The actual power consumed would be (a) 64 W (b) 80 W (c) 100 W (d) 125 W 29. A thermoelectric refrigerator works on (a) Joule effect (b) Seebeck effect (c) Peltier effect (d) thermionic emission " " ' B I O L O G Y T O D A Y | JANUARY '07 38 30. A metallic wire of 40 £2 resistance is drawn to double its length. Its new resistance will be (a) 20 Q (b) 80 Q (c) 160 Q (d) 320 Q 31. A galvanometer having a resistance of 8 ohm is shunted by a wire of 2 ohm. If the total current is 1 ampere, the part of it passing through the shunt will be (a) 0.3 A (b) 0.8 A (c) 0.2 A (d) 0.5A 32. The ratio of time period of a-particle to that of proton circulating in the same uniform magnetic field is (a) 72Tl (b) 1:72 (c) 1 : 2 (d) 2 : 1 33. When a magnetic needle is kept in a non-uniform magnetic field, it experiences (a) a force and a torque (b) only a force (c) only a torque (d) neither a force nor a torque 34. What is the self inductance of a coil which produces 5 V, when current in it changes from 3 A to 2 A in one millisecond ? (a) 5000 H (b) 5 mH (c) 50 H (d) 5 H 35. In an A.C. circuit, the potential difference across an inductance and resistance joined in series are respectively 16 V and 20 V. The total potential difference across the circuit is (a) 20 V (b) 25.6 V (c) 31.9 V (d) 53.5 V 36. Which of the following wave have the maximum wavelength ? (a) X-rays (b) infra red (c) ultra violet rays (d) radiowaves 37. The resolving power of a telescope whose lens has a diameter of 1.22 m for a wavelength of 5000 A is (a) 2 x 10 s (b) 2 x 106 2 (c) 2 x 10 (d) 2 x 104 38. If an i n t e r f e r e n c e pattern has m a x i m u m and minimum intensity in the ratio of 36 : 1, then what will be the ratio of amplitudes ? (a) 6 : 7 (b) 7 : 4 (c) 4 : 7 (d) 7 : 5 39. Huygeif s wave theory of light cannot explain (a) diffraction (b) interference (c) polarization (d) photoelectric effect 40. The focal length of convex mirror is 30 cm and the size of image is quarter of the object, then the distance of the object from the mirror is 38" " ' B I O L O G YTODAY | JANUARY '07 (a) 90 cm (c) 30 cm (b) 60 cm (d) 40 cm 41. A convex lens of focal length 40 cm is in contact with a concave lens of focal length 25 cm. The power of combination is (a) - 1 . 5 D (c) + 6.5 D (b) - 6 . 5 D (d) + 6.67 D 42. The rest mass of a photon is (a) ^ fa c he T ,.. (b) fa c2 (d) zero 43. The most important characteristic of electron in the production of X-rays is (a) charge of electron (b) mass of electron (c) revolution of electron around the nucleus (d) speed of electron 44. 450 (a) (c) The energy of a photon of light of wavelength nm is 4.4 x 10"' 9 J (b) 2.5 x l o M 9 J 17 K25 x 10~ J (d) 2.5 x 10-'7 J 45. A positron has the same mass as (a) proton (b) a-particle (c) neutron (d) electron 46. If half life of radioactive atom is 2.3 days, then its decay constant would be (a) 0.1 days"1 (b) 0.2 days"1 1 (c) 0.3 days" (d) 2.3 days ' 47. Maximum penetrating power is that of (a) a-rays (b) X-rays (c) y-rays (d} P-rays 48. When Ge crystal are doped with phosphorus atom then it becomes (a) insulator (b) p-type (c) «-type (d) super-conductor 49. In a p-n-p transistor working as a common-base amplifier, current gain is 0.96 and emitter current is 7.2 mA. The base current is (a) 0.4 mA (b) 0.2 mA (c) 0.29 mA (d) 0.35 mA 50. (a) (b) (c) (d) Optical fibres uses the phenomenon of total internal reflection refraction dispersion scattering 39 CHEMISTRY 51. T h e r e a c t i o n C H 3 - CH = C H , + HBr CH 3 CHBrCH 3 is an example of (a) free radical reaction (b) electrophilic substitution (c) electrophilic addition (d) nucleophilic addition 52. In which of the following case Kp is less than K? (a) 2SO, + O, (b) PCI. - 2S03 PCI, + Cl2 (c) N, + O, 2NO (d) H, + Cl2 2HC1. 53. If a mixture containing 3 moles of hydrogen and I mole of nitrogen is converted completely into ammonia, the ratio of initial and final volumes at the same temperature and pressure would be (a) 1 : 3 (b) 1 : 2 (c) 3 : 1 (d) 2 : 1. 54. Hybridisation state of I in IClt is (a) clsp2 (b) sp (c) sp2 55. (a) (b) (c) (d) (d) sp3 High boiling point of water is due to its high specific heat hydrogen bonding high dielectric constant low dissociation constant 56. Select the simplest alkane which exhibits optical isomerisms. (a) CMS (b)C,H6 (c) C 7 H 16 (d) C,H, 57. An organic compound is fused with fusion mixture and extracted with HNO,. The extract gives yellow precipitate with ammonium molybdate. It shows the presence of which element ? (a) P (b) As (c) both P and As (d) may be P or As or both 58. Identify Z in the sequence, CH,-CH,CH =CH,- HBr/H 2 Q, C 2 H 5 0 - Na + (a) CH - C M - C H2 - O - CH2- CH, I CH, (b) CH — CH— C H - O - C H - CH, (c) CH - (CI L ) , - 0 - C H - C H , (d) CH,-(CH 2 ) 4 —O—CH3 CH, 38 ->Z 59. To which one of the following, Dalton's law of partial pressure is not applicable ? (a) S 0 2 & C 0 2 at room temperature (b) N, & H, at room temperature (c) S 0 2 & 0 2 at room temperature (d) HC1 & NH 3 at room temperature 60. Which one of the following pairs of isomers is not metamers ? (a) CH 3 - O - C,H 7 and C,H S - O - C,H 5 (b) CH 3 CH, CH, CH,OH and CH 3 - O - C,H ? (c) CH 3 - 0 ~ - C 3 H 7 and CH 3 - O - CHCH, " (d) none of the above q j 61. Which one of the following compounds will exhibit cis-trans (geometrical) isomers ? (a) 2-butene (b) 2-butyne (c) 2-butanol (d) butanal 62. A gas cannot be liquefied if (a) forces of attraction are low under ordinary conditions (b) f o r c e s of attraction are high under o r d i n a r y conditions (c) f o r c e s of attraction are zero u n d e r o r d i n a r y conditions (d) forces of attraction either high or low under ordinary conditions 63. Sodium peroxide in contact with moist air turns white due to the formation of (a) N a 2 0 (b) Na,CO, (c) N a H C 0 3 (d) NaOH 64. (CH 3 ) 3 CMgCl on reaction with D , 0 gives (a) (CH 3 ) 3 CD (b) (CH 3 ) 3 OD (c) (CD 3 ) 3 CD (d) (CD 3 ) 3 OD 65. When chlorobenzene is treated with NH, in the presence of C u 2 0 at 202°C and 60 atm pressure, the product formed would be (a) benzene diazonium salt (b) benzyl amine (c) aniline (d) none of the above 66. Silver nitrate solution is kept in brown bottles in laboratory because (a) it reacts with ordinary white bottles (b) brown bottles cut the passage of light through it (c) brown bottles do not react with it (d) ordinary bottles catalyse its decomposition 67. CH = CH - 0,/NaQH Zn/CH.C.OOH is " " ' B I O L O G Y T O D A Y | JANUARY '07 40 (a) CH,OH - CH,OH (c) CH~COOH ~ (b) CH,CH 2 OH (d) CH,OH 68. An example of amino acid containing benzene ring is (a) tyrosine (b) serine (c) alanine (d) lysine 69. Highest pH(14) is given by (a) 0.1 M NaOII (b) IN HC1 (d) I N N a O H | c ) 0.1 M H 2 S0 4 70. The maximum number of Srf-electrons having spin quantum number s = + 1/2 are (a) 10 (b) 14 (c) 5 (d) none 71. (a) (b) (c) (d) Setting of cement is an exothermic process endothermic process neither endothermic nor exothermic may be exothermic or endothermic (a) paracetamol (c) insulin (b) aspirin (d) none of these 80. A super saturated solution is a metastable state of solution in which solute concentration (a) is equal to the solubility of that substance in water (b) exceeds than its solubility (c) less than its solubility (d) continuously change 81. Which electrolyte is least effective in causing coagulation of +ve ferric hydroxide sol ? (a) KBr (b) K 2 S0 4 (c) K.CrO, (d) K 3 [Fe(CN) 6 ] 82. The gas which is supporter of combustion is (a) NH3 (b)N,0 (c) N0 2 (d) N 2 O S 83. Which of the following hormones contains iodine? (a) adrenaline (b) testosterone (c) thyroxine (d) insulin 72. The blue colour produced on adding H „ 0 , to acidified K,Cr n O ? is due to the formation of (a) CrO s " " (b) Cr 2 0 3 (c) CrOV (d) Cr0 3 84. In the |3-particle emission, the daughter nuclide will be (a) isobar of parent (b) isotone of parent (c) isotope of parent (d) isomer of parent. 73. (a) (b) (c) (d) 85. In the reaction: H 2 S 2H+ + S3", when NH 4 OH is added, then (a) concentration of S"~ decreases (b) S2 is precipitated (c) concentration of increases (d) no action takes places. Benzoyl chloride does not react with primary or secondary amine aliphatic compound aromatic compound carboxylic acids 74. P,0, is an anhydride of (a) H > 0 4 (b) H,PO, (c) HPO, (d) none of these 75. Which of the following is not affected by the temperature? (a) normality (b) molarity (c) formality (d) molality 76. Which of the following metal cannot be obtained by electrolysis of the aqueous solutions of their salts ? (a) Ag and Mg (b) Ag and A1 (c) Mg and Al (d) Cu and Cr 86. The solubility product of a binary weak electrolyte is 4 x 10~10 at 298 K. It's solubility in mol dm"3 at the same temperature is (a) 8 x 10"10 (b) 16 x 10-20 5 (c) 4 x 10~ (d) 2 x io~5 87. For the reaction,N 2 0, 2 N O , + - | o , . Given dt d ^ ^ = K 2 [N 2 0 5 ] and d[ 0 2 ] 20,] — - / v=3 LXi 3>[ N 2 v 77. BF, acts as acid according to (a) Lewis (b) Bronsted (c) Arrhenius (d) none of these The relation in between Kv A'0 and is (a) 2 K v = K2 = 4A'3 (b) AT, = K2 = K3 (c) 2A', = 4K2 = K3 (d) none of these 78. The Cannizzaro's reaction is not given by (a) trimethvlacetaldehyde (b) acetaldehvde (c) benzaldehyde (d) formaldehyde 88. Reagent used to distinguish H , 0 2 and 0 3 is (a) PbS (b) starch and iodine (c) KMn0 4 (d) bleaching powder 79. Which of the following drugs is used as an analgesic and antipyretic drug? 89. To make PVC a flexible plastic, the additive used is called 38 ""'BIOLOGY TODAY | JANUARY '07 41 VERY SIMILAR MODEL TEST PAPER CBSE-PMT 1. Give one or two scientific words for the following sentences. (a) Term applied to the barrel s h a p e d structure organised at the equatorial plane during telophase which helps in cell plate formation. (b) Ribonucleoprotein complex formed between two synapsed homologous chromosomes. (c) The stage in cell cycle when energy source is stored for completion of cell division. (d) The radial arrangement of microtubules around a centriole pair at the beginning of prophase. (e) Time interval between two successive division. 2. R e f e r the table given below and a n s w e r the following questions. Site Actions Anterior pituitary Inhibits secretion of growth hormone & thyrotropin Inhibits secretion of insulin, Pancreas g l u c a g o n and p a n c r e a t i c polypeptide Gastro-intestinal tract Inhibits secretion of gut hormones (gastrin, secretin, VIP etc); gastric acid & pepsin; decreases blood flow, motility and c a r b o h y d r a t e absorption; increases water and electrolyte absorption (a) W h i c h h o r m o n e is r e s p o n s i b l e f o r the given physiological effects? (b) The h o r m o n e is secreted f r o m X u n d e r the stimulation of Y. Identify X and Y. 3. (a) (b) (c) (d) (e) Briefly describe the following terms. Clitellum Cnidoblast Statocyst Oncosphere Sporozoite. 28" " B I O L O G YTODAY | APRIL 07 , a i ns) 4. (i) The given statements are related to evolution. Characteristics acquired by an organism during its life time are inherited by its offsprings (ii) Organisms are products of a history of descent with modification (iii) Evolutionary change is brought about by natural selection (iv) The goal of evolution is to adapt organisms to the environment. A n s w e r the q u e s t i o n s a c c o r d i n g to t h e given statements. (a) T h e t h e o r y of e v o l u t i o n p r e s e n t e d in D a r w i n ' s "The origin of species" depends on the c o n c l u s i o n s of which of the given statements? (b) Which statements(s) best rejects Lamarck's theory of evolution? 5. Answer the following questions. (a) Explain where on the body, hair has important functions and describe these functions. (b) Which three cranial n e r v e s are i n v o l v e d in g u s t a t i o n , and w h e r e are their e f f e c t o r s located? (c) N a m e the h o r m o n e s a s s o c i a t e d with the reabsorption of both water an<; alt. (d) Why is carbon monoxide (CO) so dangerous? (e) What is mucociliary escalator and what is its functions? 6. Mention the effects of the following on the human body. (a) Nicotine (b) Alcohol (c) Tranquillizers (d) Hallucinogens (e) Caffeine. 7. Each word in Column I has minimum one and m a x i m u m three matching in C o l u m n II. Arrange them. 6 is benefitted by the presence of other but can live equally well without each other is called (a) predation (b) mutualism (c) commensalism (d) proto-cooperation 108. Which ecological pyramid can never occur in an inverted form? (a) pyramid of species (b) pyramid of numbers (c) pyramid of biomass (d) pyramid of energy 109. Geothermal energy is (a) nonrenewable and non-conventional source (b) non-renewable and conventional source (c) renewable and conventional source (d) renewable and non-conventional source 110. Which is correct for threatened (T) species? (a) it is an endangered species like rhino, Asiatic lion, which is in danger of extinction (b) it is a rare species like wild Asiatic ass with small population in certain geographical area (c) it is a vulnerable species like musk deer, black buck which is likely to move into endangered category in near future (d) it is a species to be conserved to avoid its becoming rare, endangered or vulnerable species 111. Which of the following disease is not caused by nuclear radiation? (a) haemophilia (b) leukaemia (c) pneumonia (d) both (a) and (c) 112. Pneumatophores (respiratory roots) are common in plants like Avicennia, Sonneratia growing in marshy/ swampy areas near sea shores. Which of the following is correct for such roots? (a) these are negatively geotropic roots (b) these are tap roots because they arise from horizontal secondary roots (c) these are modified primary tap roots which have become negatively geotropic (d) these are superficial roots adopted for reproduction (a) P 700 (c) carotene (b) cytochrome (d) phytochrome 115. Dormancy of seeds and buds is overcome by (a) gibberellin (b) auxin (c) abscisic acid (d) cytokinin 116. A person suffering from bleeding of gum needs which of the following food? (a) citrus (b) carotene (c) protein (d) all of these 117. When the angiotensin stimulates the adrenal cortex, the hormone produced is (a) insulin (b) vasopressin (c) ADH (d) aldosterone 118. Spinal reflexes are controlled by (a) skin (b) brain (c) spinal cord (d) none of these 119. In muscle, the contraction occurs due to (a) myosin (b) actin (c) myofibrils (d) both (a) and (b) 120. In old age, wrinkling of skin, is due to (a) actin (b) myosin (c) keratin (d) collagen 121. Structurally complete virus particle outside the host is called (a) virion (b) viroid (c) vira (d) virus 122. Foetal sex can be determined by examining cells from the amniotic fluid by looking for (a) barr bodies (b) autosomes (c) chiasmata (d) kinetochore 123. The nuclease enzyme, which begins its attack from free end of a polynucleotide, is (a) exonuclease (b) kinase (c) polymerase (d) endonuclease 124. Which of the following is non-genetic and which is utilized for protein synthesis? (a) f-RNA (b) Z-DNA (c) m-RNA (d) bacterial DNA 113. If a p h o t o s y n t h e s i s i n g plant releases oxygen containing more than the normal amount of , s O, it is concluded that the plant has been supplied with (a) C 6 H | 2 0 6 containing l 8 0 (b) H 2 0 containing l 8 0 (c) C 0 2 containing , 8 0 (d) oxygen in the form of ozone 125. The structural genes are also called (a) recon (b) muton (c) cistron (d) none of these 114. Which of the following pigments acts as a reaction centre during photosynthesis? 127.The thorn of which of the following plant is homologous? 38" " ' B I O L O G YTODAY | JANUARY '07 126. Who proved s p o n t a n e o u s g e n e r a t i o n t h e o r y untenable by using "swan-neck" flask? (a) Needham (b) L.Pasteur (c) Father Suarez (d) Van Helmont 43 (a) Pctssiflora (c) Brassica (b) (d) Bougainvillea Dalbergia 128.The life-history of f r o g reflects an aspect of evolution. It can be expressed by (a) "ontogeny repeats natural selection" (b) "ontogeny repeats phylogeny" (c) "phylogeny repeats ontogeny" (d) larval forms represent living fossils 139. A person born without (3-ceIIs or T-cells suffer form (a) autoimmune disease (b) immunodeficiency disease (c) coronary disease (d) none of the above 140. Sarcoma is a malignancy of (a) blood (b) mesoderm (c) endothelial tissue (d) epithelial tissues 129. Drawin proposed the theory of origin of species through (a) natural selection (b) mutation (c) hybridization (d) acquired characters 141. The transplantation of tissue or organs of individuals of different species is called (a) allograft (b) isograft (c) xenograft (d) all of these 130. Mammals evolved from primitive reptiles in early (a) triassic period (b) coenozoic period (c) jurassic period (d) cretaceous period 142. In the liver, alcohol is converted to (a) caffeine (b) acetone (c) acetaldehyde (d) all of these 131. The bread wheat is (a) diploid (c) tetraploid 1 4 3 . O x y g e n a t o r ( a r t i f i c i a l lung) is used in the oxygenation of blood during (a) liver operation (b) kidney operation (c) open heart surgery (d) by pass surgery of heart (b) triploid (d) hexaploid 132. Which of the following bacteria, producing an endotoxin thurioside, is used as an insecticide for agricultural pest? (a) Bacillus ihuringenesis (b) Azotobacter chrococcum (c) Streptomyces venezuelae (d) Dip/ococcus pneumoniae 133. The pollen culture is important for the production of (a) successful! plants (b) haploid plants (c) diploid plants (d) triploid plants 134. The first domesticated animal by primitive man was (a) dog (b) horse (c) cat (d) cow 135. Which of the following is common about silk, lac and honey? (a) secretions of birds (b) secretions of plants (c) products of animals (d) products of insects 136. Fuel wood is (a) a source of alcohol (b) a source of biogas (c) renewable resource (d) non-renewable resource 137. Yeast is an important source of (a) sugars (b) riboflavin (c) vitamin C (d) protein 138. Trypanosomiasis is transmitted by (a) mosquito (b) sandfly (c) tse-tse fly (d) louse 38 144. Theory of pangenesis was given by (a) Spallanzani (b) Van Helmont (c) Lamarck (d) C. Darwin 145. In the anaerobic respiration of yeast and bacteria which of following is released? (a) methanol (b) C O : (c) butanol (d) H 2 0 146. In Pimis, male cone bears a large number of (a) microsporophylis (b) megasporophylls (c) anthers (d) ligules 147. The matrix of hyaline cartilage contains (a) collagen (b) chondrin (c) ossein (d) all of these 148. The defective condition of accommodation of the eye in which distant objects are clearly seen but near objects are blurred is called (a) astigmatisms (b) presbyopia (c) myopia (d) hypermetropia 149. Territoriality occurs as a result of (a) parasitism (b) predation (c) co-operation (d) competition 150. An aquatic plant introduced from America to check pollution has become troublesome weed in India is (a) Opuntia (b) Pistia (c) Eicchornia (d) Aegilops ""'BIOLOGY TODAY | JANUARY'0744 GENERAL KNOWLEDGE 151. The battle of Haldi Ghati was fought in the year 1576 A.D. between Imperial army and (a) Rana Pratap (b) Rana Uday Singh (c) Rana Amar Singh (d) none of these 152. Lucknow is situated on the bank of the river (a) Yamuna (b) Gomti (c) Godavari (d) Ganga 153. Name the President of United States of America (USA) as on 1st January 2006. (a) Bill Clinton (b) Dick Cheney (c) George W. Bush (d) George Bush Sr. 154. Currency of Japan is (a) Yen (b) Peso (c) Dollar (d) Kyat 155. The Ashok Chakra is an award associated with (a) gallantry (b) civilian excellance (c) music & fine arts (d) sports 156. Which of the following states has international borders with three countries? (a) Arunachal Pradesh (b) Jammu and Kashmir (c) Assam (d) Mizoral 157. The "Doctrine of Lapse" was introduced by (a) Hastings (b) Canning (c) William Bentinck (d) Dalhousie 158. Which one of the following is not an industrial finance institution? (a) UTI (b) ICICI (c) N A B A R D ( d ) SFCs 159. Which one of the following is used as a food preservative? (a) sodium benzoate (b) sodium thiosulphate (c) sodium hydroxide (d) sodium bicarbonate 160. In upper layer of the atmosphere, ozone is formed by (a) the action of ultraviolet rays on oxygen (b) the combination of oxygen molecules (c) subjecting oxygen to high pressure (d) the action of nitrogen on oxygen in atmosphere Directions (Q. 161 to 165): In these questions, choose the word opposite in meaning to the given word. 161. RETICENT (a) Forward (c) Sophisticated 162. CURTAIL (a) Arrive (c) Resume ,(b) Developed (d) Communicative (b) Continue (d) Start 163. AFFLUENCE 38""'BIOLOGYTODAY | JANUARY '07 (a) Misery (c) Neglect (b) Stagnation (d) Poverty 164. AFFIRMATION (a) Denial (c) Opposition (b) Refusal (d) Obstruction 165. CANDID (a) Cunning (c) Doubtful (b) Diplomatic (d) Impertinent Directions (Q. 166 to 170) : Pick up the correct synonyms from the answer choices for each of the following words given in capital letters : 166. WAIVE (a) Forgo (c) Renew (b) Show (d) Remove 167. CASUAL (a) Believable (c) Accidental (b) Beneficent (d) Related 168. TEAM (a) A group (c) Asset (b) Full of people (d) Horde 169. JUDICIOUS (a) Helpful (c) Wise (b) Ignorant (d) Judicial 170. URGE (a) Consider (c) Emphasise (b) Influence (d) Question Directions (Q. 171 to 172) : Which of the phrases (a), (b) & (c) given below should replace the phrase given in bold in the following sentence to make the sentence grammatically meaningful and correct. If the sentence is correct as it is & no correction is required, mark (d) as the answer. 171. Through his struggle, he gained some recognised for his fellow beings. (a) regained and recognised (b) gained some recognition (c) gains some recognising (d) no correction required 172. Whether your statement is right or not, he is going to blame you. (a) right or wrong (b) right or otherwise (c) right fully or partly (d) no correction required Directions (Q. 173 to 175): Pick out the most effective word from the given words to fill in the blank to make the sentence meaningfully complete. 45 173. No one knows caught fire. (a) why (c) exactly when or how the helicopter (b) where (d) unfortunately 174. He always says that us to develop. (a) solutions (c) relations are like opportunities for (b) challenges (d) actions 175. Life in desert is (a) strenuous (c) sandy and difficult. (b) warmth (d) miraculous 176. Specify the choice which gives the numbers that would replace the question mark. 75% of 220 = ? x 15 (a) 165 (b) 110 (c) 11 (d) 1-1 177. The number of letters missed is not uniform. Which of the following series observes this rule? (a) MORTXY (b) PRTVXZ (c) DGJMPS (d) BFJNRV 178. Today is Ketan's birthday. One year from today he will be twice as old as he was 10 years ago. How old is Ketan today? (a) 19 years (b) 20 years (c) 21 years (d) 22 years 179.The s q u a r e represents doctors, the triangle represents women doctors and the circle represents surgeons. Identify the portion, labelled with one letter, showing women doctors who are also surgeons? (a) U (b) T (c) S (d) P 182. ghi, vut, def (a) ijk (b) mkj (c) gik (d) wvu 183. yxv, tsq, kjh (a) fed (b) gfd (c) jkm (d) pon 184. ikm, vxz, dfh (a) tvx (b) hjk (c) mnp (d) xwv 185. lip, gdk, qnu (a) jgm (b) Ike (c) spw (d) vyr Directions (Q. 186 to 190): In these questions, out of thefour alternatives, choose the one which best expresses the meaning of the given word. 186. TORPID (a) insipid (b) stupid (c) sensitive 187. GNOME (a) giant (b) dwarf (c) native (d) inactive . (d) alien 188. SURMOUNT (a) discount (b) surround (c) overcome (d) capture s A 0 Directions (Q. 180 to 181) : Read thefollowing passage and answer the questions given below the passage. The bus was over-crowded as it was the last one of the evening. This gave an opportunity to the pickpockets to try their skill on the unwary. One pickpocket successfully removed the purse of an old man. But at the moment he tried to pass it on to his companion, the conductor noticed the operation and helped retrieve the stolen purse. 180. The pickpocket was caught (a) while stealing (b) when he abused the victim (c) while running away (d) when handing over to another pickpocket 46 181. There was a big crowd in the bus because (a) It was festival time (b) there was no other bus that evening (c) there was a strike by bus operators (d) it was operated at economical rates Directions (Q. 182 to 185): In each question here, three letters are arranged according to some rule. Find out what letters should come in the blank space according to that rule. 189. ITINERANT (a) frequent use of the word 'it' (b) anything involving repetition (c) plan for a proposed journey (d) travelling from place to place 190. TRANSPARENT (a) verbose (b) involved (c) witty (d) lucid 191. How many members from 1 to 100 are there, each of which is not only exactly divisible by 4 but also has 4 as a digit? (a) 7 (b) 10 (c) 20 (d) 21 192. If the first and the second letters in the word DEPRESSION were interchanged, also the third and the fourth letters, the fifth and the sixth letters, and so on, then which of the following would be the seventh letter from the right? (a) O (b) P (c) R (d) S 193. How many 7's immediately preceded by 6 but not immediately followed by 4 are there in the following series? MT B I O L O G Y TODAY|FEBRUARY'07 46 (a) 7427643 6 75357 84 3 7 6 7 2 4 0 6 7 4 3 ! (b) 2 (c) 3 (d) 6 Directions (Q. 194 to 195) : In each of these questions, there are given two statements followed by two conclusions numbered I and II. You have to take the two given statements to be true even if they seem to be at variance from commonly known facts and then decide which of the given conclusions logically follows from the two given statements, disregarding commonly known facts : Give your answer as (a) if only conclusion I follows (b) if only conclusion 11 follows (c) if neither I nor II follows (d) if both I & II follows 194. Statements : All educated people read newspapers. Rahul does not read newspaper. Conclusions : I. Rahul is not educated. II. Reading newspaper is not essential to be educated. 195. Statements : JV- Some trees are horses. Biscuit is a tree. Conclusions : I. Biscuit is not a tree. II. Some horses are trees. 196. Man : Machine : : Master : ? (a) manager (b) worker (c) slave 197. Complete the series 325, 259, 204, 160, 127, 105, ( (a) 94 (b) 96 (c) 98 (d) house ) (d) 100 198. If the animals who can walk are called swimmers, those who crawl are called flying, those living in water are called snakes and those fly in the sky are called hunters, then what will a lizard be called? (a) swimmer (c) flying (b) snake (d) hunter Directions (Qs. 199 to 200) : Pick the fourth word that is associated with the first three words in some way. 199. Paper, Flower, Great, ? (a) news (b) print (c) wall (d) rose 200. Hard, Head, Boil, ? (a) hammer (b) hit (d) egg (c) rage Cut and send to: The Editor, Biology Today, 406, Taj Apartment, Ring Road, Adjacent Safdarjung Hospital, New Delhi - 110 029. Attach this form along with your response sheet. Please send a self addressed envelope along with postal stamps worth Rs.20. Do not fix the stamps on the envelope. The despatch will include ranking cum analysis sheet and solutions (detailed). Response sheet will not be entertained without the stamps and self address envelope. The last date of receipt of Response Sheets is 10th of next month. Name (Mr./Miss) Correspondence address ; Pin e-mail • / Mobile % _ in No. of questions attempted P h o n e (with STD code): 10th & year • % in 12th & year N o . of questions unattempted H a v e you enrolled to any • Science Magazine for PMT preparation CD No Q Yes, If Yes, please specify • Correspondence Course / Test series • No O Yes, If Yes, please specify • Coaching Institute • No • Yes, If Yes, please specify • Which topic you want to see in coining issues of Biology Today • What • What you like most in Biology Today ? suggestions would you 38 ""'BIOLOGY T O D A Y | JANUARY '07 like to give for :. .. its improvement? 47 Very SOLVE & SEND G e t A l l India Rank Similar MODEL TEST PAPER for BHU (Mains) 2007 M a x i m u m Marks : 4 0 0 Time : 3 h r s Instructions: 1 The question paper is divided into Two Sections. Section - A consists of 100 questions (25 each for each subject i.e. Physics, Chemistry, Botany and Zoology) This section will carry questions for best response type i.e out of four provided options only one wilt be correct answer. Section - B consists of 100 questions (25 each for each subject i.e. Physics, Chemistry, Botany and Zoology). This scction carries questions of multiple response type i.e. out of four provided options more than one shall be correct answeis. 2. For every correct answer 2 marks will be credited to your account, 1 mark will be deducted for every wrong answer and no marks will be awarded for unattempted questions. 3 Use of Trigonometric table, Calculator or any other helping device is restricted. 5. Fill in your answers in the given response sheet. Section - A 1. The position x of a particle varies with time (t) as x = at2 - bt1. The acceleration at time t of the particle will be equal to zero, when t is equal to a a (d) zero (C) 3b 3b 2. Two bodies are thrown up at angles of 45° and 60° respectively, with the horizontal. If both bodies attain same vertical height, then the ratio of velocities with which these are thrown is (a) (a) 2a ^2/3 0 ) 2/V3 (c) Sl2 (d) V 3 / 2 3. If the momentum of a certain body be increased by 50%, its kinetic energy will increase by (a) 25% (b) 50% (c) 100% (d) 125% 4. A body of mass M a t rest explodes into three pieces, two of which of mass (MIA) each, are thrown off in perpendicular directions with velocities of 3 ms - 1 and 4 ms~' respectively. The third piece will be thrown off with a velocity of (a) 1.5 ms"1 (b) 2 ms" 1 (c) 2.5 ms"1 (d) 3 ms"1 5. A c y l i n d e r rolls d o w n an inclined plane of inclination 30°, the acceleration of cylinder is (a) gl3 (b)£ (c) g/2 (d) 2gl3 and a steel wire of the same length are extended by 1 mm under the same force. The radii of brass and steel wires are RB and Rs respectively. Then (a) R, = JlR. (b) R s = Rr S » _ Rit V ~ T 8. Two capillaries of length L and 2L and of radii r and 2r are connected in series. The net rate of flow of fluid through them will be [given rate of the flow through single capillary {X = 7i/V4/8r|L] (c) Rs = 4Rr (a) 7 > x (b) (d) (C) (d) 7 " 5 9. A gaseous mixture consists of 16 g of helium and 16 g of oxygen. The ratio C / C y of the mixture is (a) 1.4 (b) 1.54 (c) 1.59 (d) 1.62 10. What will be time period of the displaced body of mass m ? (a) mun § 3A S 1* (c) 6. The time period of a satellite of earth is 5 hours. If the separation between the earth and the satellite is increased to 4 times the previous value, the new time period will become (a) 10 hrs (b) 20 hrs (c) 40 hrs (d) 80 hrs 11. The phase difference between two points separated by 0.8 m in a wave of frequency 120 Hz is 0.5ti. The wave velocity is (a) 144 m/s (b) 256 m/s (c) 384 m/s (d) 720 m/s 7. The Y o u n g ' s m o d u l u s of brass and steel are respectively 1010 N/m 2 and 2 * 1010 N/m 2 . A brass wire 12. Time taken by sunlight to pass through a window of thickness 4 mm, whose refractive index is 1.5, is MT B I O L O G Y T O D A Y | FEBRUARY '07 37 (a) (c) 2 x 10"8 sec 2 x 10"" sec (b) 2 x 108 sec (d) 2 * 10" sec 13. The division of wavefront, to obtain coherent sources, is employed in (a) Fresnel's biprism (b) Michelson's interferometer (c) Newton's rings (d) all of the above 14. In a parallel plate capacitor with air between the plates, each plate has an area of 6 x 10 -3 m 2 and the distance between the plates is 3 mm. Find the capacitance of the capacitor. (a) 25 pF (b) 20 pF (c) 18 pF (d) 15 pF 15. The total current supplied to the circuit by the battery is (a) 1 A (b) 2 A 6Q (c) 4 A (d) 6 A 16. The temperature of inversion of a thermocouple is 620°C and the neutral temperature is 300°C. What is the temperature of cold junction ? (a) 320°C (b) 20°C (c) -20°C (d) 40°C 17. A wire carrying current I and other carrying current 21 in the same direction produce a magnetic field B at the mid point. What will be the field when 21 wire is switched off ? (a) B/2 (b)2B (c) B (d) 4B 18. The magnetic susceptibility of a material of a rod is 499. Permeability of vacuum is 471 x 10~7 TmA - 1 . Permeability of the material of the rod in TmA" 1 is (a) Tt x 10"4 (b) 2n x 10"4 4 (c) 37t x 10(d) 47t x 10~4 (c) (d) diffraction and reflection diffraction and photoelectric effect 22. An X-ray photon has a wavelength 0.01 A. Its momentum (in kg-ms - 1 ) is (a) 6.63 x 10-22 (b) 3.3 x 10' 32 32 (c) 6.63 x lO" (d) 5.3 x.10" 32 23. The binding energies per nucleon of deuteron (, H 2 ) and helium atom ( 2 He 4 ) are 1.1 MeV and 7 MeV. If two deuteron atoms react to form a single helium atom, then the energy released is (a) 13.9 MeV (b) 26.9 MeV (c) 23.6 MeV (d) 19.2 MeV 24. What is the voltage gain in a common-emitter amplifier, where input resistance is 3 Q and load resistance is 24 £2? (Take (3 = 0.6) (a) 8.4 (b) 4.8 (c) 2.4 (d) 1.2 . 25. In the Boolean algebra A.B equals (a) A+B (b) JTb (C) A - B (d) a.B 26. W h i c h p r o f i l e is a t r u e r e p r e s e n t a t i o n chemisorption? (a) (b) (c) (d) of 27. Which of the following molecules is most suitable to disperse benzene in water? O 19. Voltage in the secondary coil of a transformer does not depend upon (a) voltage in the primary coil (b) ratio of number of turns in the two coils (c) frequency of the source (d) both (a) and (b) 20. A circuit has a resistance of 12 ohm and an impedance of 15 ohm. The power factor of the circuit will be (a) 1.25 (b) 0.125 (c) 0.8 (d) 0.4 21. The dual nature of light is exhibited by (a) photoelectric effect (b) refraction and interference 38 (d) CI 28. Which of the following reactions is used to make a fuel cell? (a) C d ( . v ) + 2 N i ( O H ) 3 W CdO w + 2Ni(OH) 2 ( „ + H 2 0 w MT B I O L O G Y TODAY | FEBRUARY '07 38 (b) P b w + P b O , w - 2H 2 S0 4 2PbS04W + 2H20 (c) (d) 2H, ( 2Few + °2(K) 2 H , 0 (/) 0 2 (,,, + 4H + (u 2Fe 2+ w ) + 2 H , 0 COOH (/) (/) . 29. When w-chlorobenzaldehyde is treated with 50% KOH solution, the product (s) obtained is (are) OH (a) OH V - CH-CH (b) (c) COO" CH2OH COO CH2OH (d) (c) OH 6 34. The conjugate base of OH" is (a) -I 2 0 (b)O(c) 0 2 ~ (d)02 Which of the following carbides on treatment with 35. water evolves methane? (a) CaC 2 (b) A14C3 (c) B 4 C (d) SiC 36. In the accompanied diagram the ideal behaviour of a solution is shown by the line (s) OH OH (d) p - i H ^ H - , , (a) AD CI CI 30. Which one of the following pairs of ions have the same electronic configuration? (a) Cr 3+ , Fe 3+ (b) Fe 3+ , Mn 2+ 3+ 3+ (c) Fe , Co (d) Sc 3+ , Cr 3+ . 31. A hydride of nitrogen which is acidic is (a) NH, (b) N 2 H 4 (C) N 2 H 2 (d) N 3 H 32. Among the following compounds, the one that undergoes deprotonation most readily in the presence of a base, to form a carbanion, is O O (a) AA O ¥ (b) MeO OMe O A A v x (c) MeO'' (d) ^ v 33. In the following four compounds, the one which is a functional isomer of the set of other three is CHO CHO & (a) MT (c) CD (d) AD, CB and CD 9 2 8 + yN-> A R L + 2$ + The number of neutrons in the element L is (a) 142 (b) 144 (c) 140 (d) 146 38. 3-phenylpropene on reaction with HBr gives (as a major product) (a) C 6 H 5 CH 2 CH(Br)CH 3 (b) C 6 H 5 CH(Br)CH 2 CH 3 (c) C 6 H 5 CH,CH 2 CH 2 Br (d) C 6 H 5 CH(Br)CH=CH 2 39. Among the following the dissociation constant is highest for (a) C 6 H 5 OH (b) C 6 H 5 CH 2 OH (c) CH 3 C = CH (d) CH 3 NH 3 + C1" 40. The van der Waal's parameters for gases W, X, Y and Z are given in the table. o y 0 (b) CB 37. Consider the following nuclear reactions (b) B I O L O G Y TODAY | FEBRUARY '07 Gas W X Y Z a (atm L2 mol - 2 ) 4.0 8.0 6.0 12.0 b (L mol- 1 ) 0.027 0.030 0.032 0.027 Which one of these gases has the highest critical temperature? (a) W (b) X (c) Y (d) Z 41. Which one of the following acids will undergo easy thermal decarboxylation? 39 (a) (c) C f H 5 COCH 2 COOH CgH 5 CHOHCOOH «o 48. Which bond angle 9 would result in the maximum dipole m o m e n t f o r the t r i a t o m i c m o l e c u l e XYZ as shown in figure? (a) 90° (b) 120° (c) 150° (« QT ' 49. Density ratio of 0 2 and H 2 is 16 : 1. The ratio of their r.m.s velocities will be (a) 1 : 4 (b) 1 : 16 (c) 4 : 1 (d) 16 : 1 (b) C 6 H 5 COCOOH (d) C 6 H 5 CHNH 2 COOH 42. The strongest base among the following is (a) •N" (c) H 43. Boiling CuCl, with excess of copper turnings and concentrated HC1 gives (a) CuCl (s) (b) Cu 2 0 ( s ) (c) [cucy44. (a) (c) Set containing isoelectronic species is , N O + , CN~, Of C 0 2 , N 0 2 . O,, N 2 O s (b) C O , N O , 0 2 , C N CH, CH,CH,0 Na + + CH, - C - Br CH, CH, (c) I H 2 S0 4 ,A C H , - C - OH + HO - C2H5 — — 1 — o CH, CH, I ' (d) C H - C - Br + HO - C l f C H , I CH, 47. The heat of neutralization of a strong base and a strong acid is 57 kJ. The heat released when 0.5 mole of H N O , solution is added to 0.20 moles of NaOH solution, is (a) 11.4 kJ (b) 34.7 kJ (c) 23.5 kJ (d) 58.8 kJ 40 CH3COOH • SOCI, Benzene Anhy. A1C1, HCN The structure of S would be OH I (d) CO, C 0 2 , N O , N 0 2 46. For the preparation of /-butyl ethyl ether, which method/reaction is to be preferred? CH, i (a) CH,CH, — Br + N a ' O - C - CH, * I CH, (d) 180° In a set of reactions acetic acid yield a product S (d) [cucy- 45. The emf of the following Daniel cell at 298 K is . Zn | Z n S 0 4 (0.01 M) 11 CuS0 4 (1.0 M) | Cu When concentration of ZnS0 4 is 1.0M and that of CuS0 4 is 0.01 M, the emf changed to E2. What is the relationship between E, and (a) £ , > E2 ' (b) £, < E2 (c) £ , = E2 (d) E2 = 0*E2 (b) 50. 8 (a) COOH tor]•C—COOH (b) CH, (c) OH I CH,-C-CH3 cor CN (d) C H — C— CH, OH CN I C— CH, I OH 51. Which of the following have typically coenocytic mycelium? (a) chlorophyceae (b) phycomycetes (c) lichens (d) liverworts 52. In Pinus, the third tier of embryonal cells from below is known as (a) rosette tier (b) suspensor tier (c) embryonal tier (d) free-nuclear tier 53. The first heart sound is produced when (a) semilunar pressure and valve snap shut (b) interventricular pressure decreases (c) diastole begins (d) bicuspid and tricuspid valve close quickly 54. In most biological systems, two electrons and two protons are removed. The process is known as (a) decarboxylation (b) dehydrogenation (c) deamination (d) carboxylation 55. Despite high level of heterozygosity, the progeny derived from seed of a cross pollinated plant was found to be c o m p l e t e l y u n i f o r m . O n e r e a s o n f o r this phenomenon is (a) induced mutation (b) apomixis (c) parthenocarpy (d) polyploidy MT BIOLOGY TODAY | FEBRUARY '07 40 56. The four daughter cells derived from a single meiosis differ from each other due to (a) independent assortment of chromosomes only (b) crossing over only (c) difference in chromosome number (d) crossing over as well as independent assortment of chromosomes 57. Biological weathering of rock initially brought about by lichens that are (a) foliose (b) crustose (c) leprose (d) fruticose 58. In earthworm, the arrangement of blood vessels is (a) different in last fifteen segments (b) different in first thirteen segments (c) same throughout the body (d) different in the middle thirteen segments 59. In a m a m m a l i a n s p e r m , s p i r a l l y a r r a n g e d mitochondria around the axial filament are present in the region of (a) its principal piece of the tail (b) its middle piece (c) its head portion (d) end-piece of the tail 60. 'Horn toad' is a/an (a) (c) reptile 61. in a (a) (c) The release of pancreatic juice from the pancreas, mammal, is stimulated by secretin (b) enterokinase trypsinogen (d) cholecystokinin fish (b) amphibia (d) mammal 62. Blood calcium level can be increased by the administration of (a) thyroxine (b) parathormone (c) glucagon (d) calcitonin 63. The sporophyte dependent upon gametophyte is found in (a) bryophytes (b) fungi (c) algae (d) pteridophytes 64. The genes for antibiotic resistance are found in (a) cell wall (b) nucleus (c) chromosome (d) plasmid 65. In photosynthesis, splitting of water and release of oxygen occurs during (a) carboxylation phase (b) red drop (c) photolysis (d) photophosphorylation MT B I O L O G Y TODAY | FEBRUARY '07 66. The feathery stigma is present in (a) Caesalpinia (b) pea (c) wheat (d) Datura innoxia 67. The ribozyme is a RNA (a) with extra phosphate (b) without phosphate (c) without sugar (d) with enzymatic activity 68. "Crown gall" is caused by (a) Envinia (b) Agrobacterium (c) Mycobacterium (d) Clostridium 69. Which of the following pairs belong to the category of cold blooded animals? (a) snakes and birds (b) bat and rats (c) frog and snakes ,(d) birds and monkey 70. Lateral ventricle and diocoel of brain (third ventricle) are connected by (a) foramen magnum (b) foramen of monro (c) occipital foramen (d) aqueduct of Sylvius 71. (a) (b) (c) (d) Stratum lucidum is found in dermis and secrete keratin epidermis and situated below stratum corneum dermis and release keratin epidermis and originates from hair follicle 72. The oxygen dissociation curve is (a) parabola (b) slope (c) sigmoid (d) straight line 73. Biologically, marriage is prohibited between (a) R l r boy and R l r girl (b) Rh + boy and R l r girl (c) Rh + boy and Rh + girl (d) R l r boy and Rh + girl 74. The environmental factor that influences the elongation of polypeptide chain is (a) humidity (b) oxygen (c) light (d) temperature 75. Thick cuticles on leaves are typical of plants growing in (a) dry habitats (b) warm habitats (c) wet habitats (d) cool habitats 76. Mendel's dihybrid cross ratio is (a) 12 : 3 : 1 (b) 1 : 2 : 1 (c) 9 : 3 : 3 : 1 (d) 15 : 1 77. Which of the following is a protective device? (a) symbiosis (b) competition (c) camouflage (d) commensalism 78. The pressure by which root hairs absorb water and minerals from the soil is (a) ion exchange (b) osmosis 41 (c) DPD (d) turgor pressure 79. (a) (c) Meristele of fern is amphicribal collateral (b) radial (d) leptocentric 80. An excessive enlargement of diseased organ, due to an increase in the number of cells, is called (a) necrosis (b) hyperplasia (c) hypertrophy (d) damping off 81. Which of the following organelle does not contain RNA? (a) nucleolus (b) plasmalemma (c) chromosome (d) ribosome 82. Chemical transmission of nerve impulses from one neuron to another, or from a neuron to a muscle by (a) cholecystokinin (b) acetylcholine (c) cholesterol (d) all of these 83. hills (a) (c) Which fossil man has been known from Shivalik in India? Sinanthropus (b) Ramapithecus Pithecanthropus (d) Zinjanthropus 84. Fat is converted into fatty acid and glycerol by which of the following enzyme? (a) ptyalin (b) lipase (c) amylase (d) trypsin 85. If a sporangium is derived from a single cell, it is called (a) heterosporangiate (b) eusporangiate (c) leptosporangiate (d) none of these 86. and (a) (c) Protective layer of radicle during seed germination endosperm formation is suspensor (b) coleorhiza coleoptile (d) plumule 87. A gene, which affects the character of another gene, not located on similar locus of t h e h o m o l o g o u s chromosome is called (a) complementary gene (b) epistatic gene (c) duplicate gene (d) supplementary gene. 88. The thermal algae can survive in a hot water spring at (a) 80°C (b) 70°C (c) 60°C (d) 90°C 89. Genetic transfer through viruses is called (a) conjugation (b) transduction (c) sexduction (d) transformation 42 90. Two sister chromatids are attached with (a) chromocentre (b) spindle fibre (c) centromere (d) chromatid 91. The largest type of nematocysts in Hydra are (a) atrichous isorhiza (b) penetrants (c) volvent (d) holotrichous isorhiza 92. How much energy is consumed from one trophic level to another trophical level? (a) 15% (b) 10% (c) 5% (d) 20% 93. Hermit crab and sea anemone relationship is (a) mutualism (b) symbiosis (c) commensalism (d) none of these 94. Which of the following amino acids is present in ornithine cycle? (a) glycine & methionine (b) arginine & citruline (c) valine & cystine (d) none of these 95. (a) (b) -(c) (d) 'Ozone hole' refers to reduction in the thickness of ozone layer in stratosphere reduction in ozone layer in stratosphere hole in the ozone layers increased concentration of ozone 96. Most common ovule having funiculus lying close to the micropyle is called (a) anatropous (b) campylotropous (c) circinotropous (d) amphitropous 97. (a) (b) (c) (d) Euploidy is best explained by one chromosome less than the haploid set exact multiples of a haploid set of chromosome one chromosome more than the haploid set one chromosome more than the diploid set 98. Isotopes used f o r p r o v i n g s e m i c o n s e r v a t i v e replication of DNA are (a) N14 and P31 (b) N14 and N 15 14 14 (c) N anc C (d). C' 4 and P 31 99. (a) (b) (c) (d) Bordeaux mixture, a fungicide consists o f M g S 0 4 + Ca (OH)j copper sulphate + calcium hydroxide magnesium hydroxide copper sulphate + sodium hydroxide 100. Resin duct of si gymnospermous stem is an example* of (a) big vacuole (b) intercellular space (c) lysigenous cavity (d) schizogenous cavity MT B I O L O G Y TODAY | FEBRUARY'0742 Section - B Direction : In the following items more than o n e of the a n s w e r s given may be correct. Select the correct a n s w e r s and mark it according to the code. Code : (a) I. 2 and 3 are correct (b) 1 and 2 are correct 101. If L, C, R represent inductance, capacitance and resistance respectively, the c o m b i n a t i o n s having dimensions of frequency are ( 1 ) 1 /JCL (2) L/C (3) R1L (4) R.C 102. Two particles are projected from the same point with the same speed, at different angles 0, and 9 2 to the horizontal. Their times of flight are and /2 and they have the same horizontal range. Then (1) t J h = tan 6, (2)e, + e2 = 90 o (3) ti / sinG, = t2 / sin9 2 (4) f, / t2 = tan8 2 103. When you carry a body from floor and keep it on table, work done does not depend on (1) time taken in doing so (2) path chosen (3) weight of the body (4) height of the table 104. (1) (2) (3) (4) Inside a uniform spherical shell gravitational field is zero gravitational potential is zero gravitational potential is constant gravitational field is constant 105. The torque required to produce a unit twist in a solid bar of length / and radius r is (1) directly proportional to r 2 (2) directly proportional to r 4 (3) inversely proportional to r2 (4) inversely proportional to / 106. If a sample of metal weighs 210 g in air, 180 g in water and 120 g in liquid, then the (1) relative density of metal is 7 (2) relative density of metal is 3 (3) relative density of liquid is 3 (4) relative density of liquid is (1/3) 107. If a , P and y are coefficients of linear, superficial and volume expansion respectively, then (1) (P/a) = (1/2) (2) (P/y) = (2/3) (3) (p/a) = (y/p) (4) (y/a) = (3/1) 108. Which o f the f o l l o w i n g f u n c t i o n s are path independent? (1) gravitational potential energy (2) heat (3) internal energy (4) work MT BIOLOGY TODAY | FEBRUARY '07 (c) 2 and 4 are correct (d) 1 and 3 are correct 109. Which of the following will not show the change in their time period when they are taken to moon? (1) a simple pendulum (2) a torsional pendulum (3) a physical pendulum (4) a spring-mass system 110. A wave is represented by the equation y = ^ 1 0 * r + 1 5 1 t f + - J , w h e r e x is in metre and t is in second. The expression represents (1) a wave travelling in the negative x-direction having a wavelength 0.2 m (2) a wave travelling in the negative x-direction with a velocity 1.5 m/s (3) a wave travelling in the positive ^-direction with a velocity 1.5 m/s (4) a wave travelling in the positive x-direction having a wavelength 0.2 m 111. Three concentric spherical metallic shells A, B and C of radii a, b and c (a < b < c) have charge densities of a , - o and o respectively. The potentials of A, B and Care (1) (a-b (2) VB = 'J \b 'a2 + c)c A b -¥c +e a (3) v (4) VA=V„ =Ff =— [a + b + c}G c = — e 112. A parallel plate air capacitor is connected, to a battery. The quantities charge, voltage, electric field and energy associated with the capacitor are given by go, V0, E0, and U0, respectively. A dielectric slab is n o w introduced to fill the space between the plates with the battery still in connection. The corresponding quantities now given by Q, V, £ and U are related to the previous ones as (1) V> V0 (2)Q>Q0 ( 3 ) £ > £0 (4) U> U0 113. The balanced Wheatstone bridge is shown in figure. If P is made 11 £2 then which of the following condition will not balance the Wheatstone bridge again ? 43 o=ioon -^WWv />=10Q WAA. (1) (3) R=20t2 S=200£2 R increases by 2 Q (2) S increases by 20 Q O increases by 10 Q (4) RS = 2200 114. In the network shown above, points A, B, C are at(70V)10Q S4 20Q potentials of 70, zero ^ and 10 V respectively. (1) point D is at a potential of 40 V "-»(iov) (2) the currents in the sections AD, DB and DC are in the ratio 3 : 2 : 1 (3) point D is at a potential of 20 V (4) the currents in the sections AD, DB and DC are in the ratio 1 : 2 : 3 115. (1) (2) (3) (4) Which of the following statements is/are incorrect? both Peltier and Joule effects are reversible both Peltier and Joule effects are irreversible Joule effect is reversible, whereas Peltier effect is irreversible Joule effect is irreversible, whereas Peltier effect is reversible 116. A long s t r a i g h t c o n d u c t o r , / A carrying a current 1, is bent to form an almost c o m p l e t e circular loop of radius r on it. The magnetic field at / M the centre of the loop (1) is directed out of the paper (2) is directed into the paper Mi 2r! (4) 121. When a nucleus with atomic number Z and mass number A undergoes a radioactive decay process (1) both Z and A will decrease, if the process is a decay (2) Z will decrease but A will not change, if the process is P + decay. (3) Z and A will remain unchanged, if the process is y decay (4) Z will decrease but A will not change, if the process is P~ decay 122. An e~ in a hydrogen atom makes a transition from n = to n = n2. The time period of the e~ in the initial state is eight times that in the final state. The possible values of «, and n 2 are (1) n, = 4, « 2 = 2 (2) «, = 8, M2 = 2 (3) «, = 6, n2 = 3 (4) «, = 8, n2 = 1 B9- H H A (1) 0 (4) A n r 2 118. An LC c i r c u i t has c a p a c i t a n c e C, = C and inductance'/., = L. A second circuit has C 2 = C/2 and L2 = 2 L and a third circuit has C 3 = 2 C and L3 = 1/2. All the three capacitors are charged to the same potential V, and then made to oscillate. Then (1) maximum current is greatest in second circuit (2) maximum current is greatest in third circuit (3) maximum current is greatest in first circuit (4) angular frequency of oscillation is same for all the three circuits 44 120. Resolving power of reflecting type telescope increases with (1) decrease in wavelength of incident light (2) increase in wavelength of incident light (3) increase in diameter of objective mirror (4) decrease in diameter of objective mirror 123. To get an output Y = 1 from circuit of figure the input must be M has magnitude | 2r 117. Units of magnetic moment are (1) A m 2 (2) JT-' (3) JT 119. In Young's double slit experiment the interference pattern is found to have an intensity ratio between the bright and dark fringes as 9. This implies (1) the intensities at the screen due to two slits are 5 and 4 units (2) the intensities at the screen due to the two slits are 4 and 1 units (3) the amplitude ratio is 3 (4) the amplitude ratio is 2 B c 1 0 (2) 1 0 1 (3) (4) 0 0 1 1 1 0 124. The impurity atoms with which pure silicon should be doped to make a p-type semiconductor are those of (1) aluminium (2) antimony (3) boron (4) phosphorus 125. According to Bohr's theory of hydrogen atom, for the electron in the n th allowed orbit, the (1) linear momentum is proportional to (1/h) (2) the kinetic energy is proportional to (1/h 2 ) (3) the angular momentum is proportional to n (4) radius is proportional to n MT BIOLOGY TODAY | FEBRUARY '07 44 126. Which of the following will react with aldehydes, ketones and nitrosobenzene? (1) N H 2 - N H 2 (2) N H 2 - O H (3) Grigrard's reagent (4) benzyl chloride 127. For which of the following reactions change of enthalpy equals to the change in internal energy? (I) H, + I, - » 2HI (2) P C l 5 f e ) P C l 3 ( g ) + Cl2(g) (3) C (s) + 0 2 ( g ) - > C0 2 f e ) (4) 2 H 2 0 2 - » 2 H , 0 + 0 2 128. (1) (2) (3) (4) In to to to to a nuclear reactor, heavy water is used provide high speed neutrons reduce the speed of neutrons capture neutrons produced by nuclear fission transfer the heat from the nuclear reactor 129. Which of the following reactions do not lead to the formation of colloidal solution? (1) (2) (3) (4) Cu + HgCl 2 —» CuCl 2 + Hg Cu + CuCl 2 2 CuCl 2 Mg + CO, - > 2 MgO + C 2 H N 0 3 + 3 H 2 S - ) 3 S + H 2 0 + 2 NO 130. (1) (2) (3) (4) Which of the following is/are true? sucrose is a non reducing sugar glucose is oxidised by Fehling solution fructose is not oxidised by H N 0 3 fructose is oxidised by bromine water 131. (1) (2) (3) (4) A buffer solution can be prepared from a mixture of sodium acetate and acetic acid in water sodium chloride and hydrochloric acid in water ammonia and ammonium chloride in water ammonia and sodium hydroxide in water 132. Which of the following will increase the formation of ammonia? N 2( ,)+3H 2fe) 2NH 3te) ; AH = - x kJ (1) increase of temperature (2) increase of pressure (3) decrease of pressure (4) addition of nitrogen 135. Strong heating of Me 2 N-<^ Me produces N, N- o- dimethyl hydroxylamine alongwith (1) CH 2 = C H - C D 3 (2) C H 3 - C H = CD 2 (3) CH 2 = C D - C D 3 (4) Me2N = C - C H 3 CD3 136. In a Daniel cell, the EMF of the cell can be increased by (1) increasing [Zn 2+ ] (2) decreasing [Zn 2+ ] 2+ (3) decreasing [Cu ] (4) increasing [Cu 2+ ] 137. Which of the following statement (s) is (are) correct? (1) a plot ofP versus Kis linear at constant temperature (2) a plot of log [X\ versus time is linear for a first order reaction X—>P (3) a plot of log P versus log V is not linear at constant temperature (4) a plot of P versus 1 / F is linear at c o n s t a n t temperature 138. Which observation/s will be correct about the major products X and Y of the following reaction? ,D so2ci2 >X peroxide (1) (2) Xis ale. KOH/A Xis D D D D ; 133. 100 ml of 0.5M hydrazoic acid (HN3, Ka = 3.6 x 10"4) and 400 ml of 0.1M cyanic acid (HOCN, Ka = 8 * 10"4) are mixed. Which of the following is (are) true for the final solution? (1) [ H + ] = 1 0 - 2 M (2) [N3~] = 3 , 6 x 10- 3 M (3) [OCN-] = 4.571 x lO"3 M (4) [H + ] = 1.4 x 10" 2 M (3) 7 is D D 139. Keto enol tautomerism is observed in (1) C 6 H 5 CHO (2) C 6 H 5 COCH 3 (3) C 6 H 5 COC 6 H 5 (4) C 6 H 5 COCH 2 COCH 3 140. Aqueous solution of KI dissolves molecular iodine to form a complex KI 3 . It contains (1) K 3+ ions (2) K + ions (3) I" ions (4) IJ ions (1) C10 4 " (2) BF 3 141. Which of the following reactions is feasible as per given chemical equations? (3) SOJ (4) CO; 2 - (1) 134. Which of the following species are hypervalent? MT BIOLOGY TODAY | FEBRUARY '07 CF3I + OH —»CF3H + IO~ (a(/) 45 (2) Rb[ICl,] RbCl + ICl (3) R,SiCI, (4) all the above are feasible reactions hydr0lySIS > R2Si(OH)2—> (3) R,Si=0 142. Under Wolf-Kishner reduction conditions, the conversions which may be brought about are (1) benzophenone into diphenylmethane (2) benzaldehyde into benzyl alcohol (3) cyclohexanone into cyclohexane (4) cyclohexanone into cyclohexanol 143. Diborane undergoes reactions with (I) trimethylamine (2) ammonia (3) carbon monoxide (4) carbon dioxide 144. Which of the following statement (s) is (are) correct? (1) the co-ordination number of each type of ion in CsCI crystal is 8 (2) a metal that crystallises in bcc structure has a coordination number of 12 (3) in Schottky defect, density of crystal alters, while in Frenkel defect, density remains constant (4) in both Schottky defect and Frenkel defect density of crystals remains constant 145. Which of the following pairs of ions can be separated by H,S in dilute HC1? (1) Zn 2+ , Cu 2+ (2) Bi 3+ , Sn 2+ 2+ 2+ (3) Mn , Hg (4) Cu 2+ , Cd 2+ 146. 10.78 g of H 3 P 0 4 in 550 ml solution is 0.40 N. Thus this acid (1) has concentration 0.2 M (2) has been neutralised to P 0 4 2 (3) gives 2H + ion (4) has been neutralised to H 2 P0 4 ~ 147. When pent-2-yne is treated with H 2 0 / H + / H g 2 + t h e products formed are (1) CHjCOCHJ CH 2 CH 3 (2) CH 3 CH 2 COCH 2 CH 3 (3) CH 3 CH 2 CH 2 COOH + HCOOH (4) CH 3 CH 2 CH 2 COOH 148. W h i c h of t h e f o l l o w i n g s t a t e m e n t s [Fe(H 2 0) 5 N0] 2 + are correct? (1) oxidation state of Fe i s + 1 (2) coordination number of Fe is 6 (3) charge on N O is +1 (4) oxidation state of Fe is +2 about 149. Which of the following statement (s) is (are) wrong? (1) if the value of I - 1, the electron distribution is spherical (2) the shape of the orbitals is given by magnetic quantum number 46 (4) the magnetic quantum number always has a positive value angular momentum of Is, 2s, 3s electrons are equal 150. Which of the f o l l o w i n g are o r g a n o m e t a l l i c compounds? (1) Zn (CN) 2 (2) Ni (CO) 4 (3) N i C 0 3 (4) K[PtCl 3 (C 2 H 5 )] 151. The largest gland in the body, lying immediately under the diaphragm & below the right ribs, plays an important roles in many metabolic processes. Like, (1) it detoxifies the blood by removing & metabolizing poisonous substances (2) process of uric acid formation takes place in this gland (3) it stores glucose as glycogen and breaks down glycogen to glucose between meals to maintain a constant glucose concentration in the blood (4) it brings about the conversion of pepsinogen into pepsin 152. W h e n m a n i n h a l e s air c o n t a i n i n g n o r m a l concentration of oxygen as well as carbon monoxide he suffers from suffocation because (1) carbon monoxide reacts with oxygen, which is thus removed from the air entering the lung (2) haemoglobin combines with carbon monoxide instead of oxygen & the product cannot dissociate (3) carbon monoxide affects the nerves of lungs (4) amount of haemoglobin available for oxygen transport is reduced 153. If Henle's loop were absent from the mammalian n e p h r o n , then which of t h e f o l l o w i n g cannot be expected ? (1) there will be no urine formation (2) there will be hardly any change in the quality and quantity of urine formed (3) the urine will be more concentrated (4) the urine will be more dilute 154. If a h u m a n f e m a l e s t a r t s d e v e l o p i n g m a l e characteristics like beard, degeneration of uterus & ovaries, enlargement of clitoris etc. then the correct reason for such characters are (1) over production of estrogen (2) over production of progesterone (3) damage to posterior pituitaiy (4) over production of adrenal androgens 155. Human body regularly loses cells in the region of (1) skin surface (2) lining layer of gut (3) red blood cells (4) nails MT BIOLOGY TODAY | FEBRUARY '07 46 156. Which of the following characteristics belongs to cleavage ? (1) decrease in size of blastomeres (2) rapid mitotic cell divisions (3) interphase is very short duration (4) differentiation of blastomeres 157. To prepare DNA for replication, a series of proteins aids in the unwinding and separation of the double stranded molecules. These proteins are (1) reverse transcriptase (2) DNA single stranded binding protein (SSBs) (3) ptyalin (4) primase 158. (1) (2) (3) (4) Which of the following matching pair are correct ? chancroid Haemophilus ducrei syphilis — Treponema pallidum genital warts Trichomonas vaginalis chlamydia human papilloma virus 159. Which of the f o l l o w i n g matched ? (1) elephant (2) wild ass (3) great Indian bustard (4) flamingo - pairs are incorrectly Ranthambore Dachigam Assam Rann of Kutch 160. Mesozoic era (1) is an era of geologic time between the paleozoic and the coenozoic spanning the time between 248 & 65 millions years ago (2) is also called age of trilobites (3) term was coined by John Phillips in 1840 (4) word is from Greek and it means old life 161. Which of the following statements are correct ? (1) in 1983 C y c l o s p o r i n e b e c a m e t h e f i r s t immunosuppressive drug licensed for transplant recipient (2) the first successful organ transplant was a kidney transplant performed in 1954 in Botson (3) multiple sclerosis is a progressive disease of the autonomous nervous system caused by antibodies that attack the meninges (4) B cells produce a large clone of plasma soon after it is formed 162. Dopper images can help the physician to see and evaluate (1) the presence of an antigen or antibody in a sample by antigen - antibody interaction (2) blockage to blood flow (such as clots) (3) cancers of lungs, liver & pancreas (4) build up of plaque inside the vessel 163. Adipose tissue is a connective tissue present MT B I O L O G Y TODAY | FEBRUARY '07 beneath the skin, around the kidneys, in mesentry & bone marrow. Besides adipocytes it contains (1) fibroblast (2) macrophages (3) collagen fibres (4) ossein 164. Of the following, what do both mitochondria and chloroplast have in common ? (1) DNA is present (2) ATP is produced (3) ribosomes are present (4) RNA is present 165. Which of the following represent the connecting link on the basis of anatomy ? (1) Archaeopteryx between reptiles & birds (2) lung fish between amphibians & birds (3) duck billed platypus between reptiles & mammals (4) Seymoria between reptiles & birds 1 6 6 . W h i c h of t h e f o l l o w i n g e f f e c t s are d u e to parasympathetic nervous system which maintains those conserving functions that restore the organism during period of tranquillity ? (1) increases heart rate (2) decreases heart rate (3) increases contractility (4) glycogen synthesis 167. Marfan syndrome results in abnormally long and distensible extremities, abnormally distensible skin and a high incidence of vascular aneurysms. This syndrome (1) involves defective collagen cross linking (2) is a connective tissue disorder (3) is a malformation of chromosome 18 specifically the part of it that is used by body to manufacture connective tissue (4) is a vascular tissue disorder 168. Male reproductive organs of cockroach are (1) utricular gland (2) collaterial gland (3) conglobate gland (4) telson 169. (1) (2) (3) A trait found in all mammals is/are seven cervical vertebrae placenta hair (4) parotoid gland 170. (1) (2) (3) (4) Framework elements takes part in synthesis of protoplasm synthesis of cell wall synthesis of nucleoplasm formation of storage products 171. Nucleotides, porphyrins, polypeptides and other biochemical developed nonenzymatically in early broth due to (1) oxygen free atmosphere (2) low temperature (3) irradiated environment (4) oxygen rich atmosphere 47 172. Which of the following mechanisms are important in the death of erythrocytes in human body ? (1) phagocytosis (2) hemolysis (3) mechanical damage (4) blood clotting 173. When a mosquito takes a blood meal from a person infected with malaria, which of the following is / are not ingested by it ? (1) sporozoites (2) merozoites (3) male & female gametes (4) male & female gametocyte 174. Which of the following are poisonous snake ? (1) kraits (2) python (3) sea snake (4) double headed snake 175. (1) (2) (3) (4) Oedema is due to increased permeability of capillary walls reduced return of lymph decreased capillary pressure decreased permeability of capillary walls 176. Antitranspirants are substances that are employed for reducing the rate of transpiration. They include (1) phenylmercuric acetate (2) abscisic acid (3) IAA (4) morphine 177. Necrosis, that is death of cells in plants is caused by the deficiency of a number of elements as (1) phosphorous (2) nitrogen (3) potassium (4) copper 178. Dark phase or carbon assimilation in plants occur by the following modes as (1) pentose phosphate pathway (2) cyclic photophosphorylation (3) Calvin cycle (4) Hatch Slack cycle 179. Which of the following reactions are intermediate steps of glycolysis ? (1) F - 6 - P — > F - 1 , 6 BP (2) 1, 3 - bis PGA —> 3 PGA (3) 2 PGA - > PEP (4) acetyl CoA + OAA —> citric acid 180. In hemitropous ovule, the body of the ovule lies at right angle to funiculus and chalaza and micropyle lie on the same straight line. This is characteristic of (1) ranunculaceae (2) primulaceae (3) magnoliaceae (4) orchidaceae 181. Cytokinin, a growth hormone, affect plant growth by regulating (1) prevention of senescence (2) overcome dormancy (3) cell division (4) bolting 48 182. Measurement of growth in plants can be done by (1) auxanometer (2) crescograph (3) potometer (4) hygrometer 183. The f o l l o w i n g characteristics are typical f o r troprical evergreen forests (1) 200 - 350 cm of rainfall/year (2) diversity and productivity is maximum (3) soil is highly leached and so poor in nutrients (4) there is hot summer and cold winters 184. Project tiger started in 1973, due to decrease in number of tiger population protected tigers. The national park that include tiger project are (1) Corbett national park (2) Ranthambore national park (3) Bandipur national park (4) Kaziranga national park 185. Which of the following characters are not shown by hydrophytes ? (1) have fleshy organs that store water and mucilage (2) leaves show heterophylly (3) have n e g a t i v e l y g e o t r o p i c r o o t s c a l l e d pneumatophores (4) possess special air storage parenchyma called aerenchyma 186. (1) (2) (3) The diseases caused by fungi in plants are tobacco mosaic disease wilt of pigeon pea citrus canker (4) late blight of potato 187. Triticum aestivum or b r e a d w h e a t is an allohexaploid plant (6n = 42, AABBDD) obtained by crossing the following plants. (1) Aegilops Squarossa (2) Triticum dicoccum (3) Aegilops speltoides (4) Raphanus sativus 188. Bacillus thuringiensis is an important tool in biotechnology. Which of the following are true for the organism? (1) its gene has been used to produce Bt cotton (2) it is used to obtain an insecticide called thurioside (3) hirudin protein is present in the organism ( 4 ) ' its spores are used as bioweapon to produce anthrax 189. Which among the following represents the floral formula of family liliaceae ? (1) ©«? P ^ A , + 3 G a , (2) © Purkinje fibres —> bundle of His —> AV node —» heart muscles (b) AV node —> SA node —> Purkinje fibres —» bundle of His —» heart muscles (c) AV node —> bundle of His —> SA node Purkinje fibres —» heart muscles (d) SA node AV node —» bundle of His —> Purkinje fibres —> heart muscles 65. (a) (b) (c) A person having blood group O can receive blood of groups O, A, B, and AB groups A, B and AB groups B and AB (d) group O only 66. The ability of producing hyperosmotic urine in vertebrates generally depends on (a) area of Bowman's capsule epithelium (b) length of Henle's loop MT B I O L O G Y TODAY | FEBRUARY '07 72 (c) length of the proximal convoluted tubule (d) capillary network forming glomerulus 67. that (a) (c) If diameter of afferent renal arteriole is less than of efferent arteriole, ultrafiltration will be slower (b) faster stop (d) uninfluenced 68. A great trochanter is found in (a) humerus (b) radio-ulna (c) femur (d) tibio-fibula 69. What is the function of calcium ions in muscle contraction? (a) they allow cross-bridges to form between actin and myosin (b) they cause actin and myosin filament to become shorter (c) they make membrane permeable (d) they allow the fibre membrane to depolarise 70. In an accident, a person's brain was injured due to which he could not regulate body temperature, hunger and water balance. Which one of the following parts of his brain was affected? (a) hypothalamus (b) medulla oblongata (c) cerebellum (d) corpora quadrigemina 71. (a) (c) (d) Sound is amplified by the pinna (b) tympanic membrane malleus, incus and stapes round windows 72. Surgical removal of which of the f o l l o w i n g endocrine glands will maximally upset calcium levels in the blood of man? (a) parathyroid (h) adrenal medulla (c) thyroid (d) pancreas 73. Which type of hormone is administered to aid parturition? (a) that which activate smooth muscles (b) that which increase metabolism in the body (c) that which raises blood glucose level (d) that which stimulates the ovary 74. Correct hormonal sequence in the increase of menstruation is (a) estrogen, FSH and progesterone (b) estrogen, progesterone and FSH (c) FSH, progesterone and estrogen (d) FSH, estrogen and progesterone 75. Which of the following set of hormones is produced by single endocrine gland? MT B I O L O G Y TODAY | FEBRUARY '07 (a) (b) (c) (d) oxytocin, prolactin and ACTH oxytocin, vasopressin and aldosterone adrenaline, noradrenaline and ICSH thyroxine, secretin and ACTH 76. Pollinia are sac like structures (a) which are present in anther lobes (b) which secrete yellow substance called pollen kit material (c) in which pollen grains of anthers are present (d) in which pollen sacs are present 77. (a) (b) (c) (d) Meiosis in a plant takes place when there is change from gametophyte to gametophyte from sporopyte to gametophyte from gametophyte to sporophyte from sporophyte to sporophyte 78. During maturation phase of spermatogenesis (a) primary spermatocytes divide twice giving rise to f o u r cells c o n t a i n i n g t h e s a m e n u m b e r of chromosome as the starting cell (b) spermatogonia divides twice giving rise to four haploid cells (c) primary spermatocytes divide once to give rise to two haploid secondary spermatocytes (d) the present cell divides repeatedly to give rise to numerous sperms 79. Cortical granules are associated with (a) oogenesis (b) spermatogenesis (c) cleavage (d) fertilization 80. During regeneration, modification of an organ to other organ is known as (a) accretionary growth (b) morphallaxis (c) morphogenesis (d) epimorphosis 81. When a true breeding tall plant is crossed with a true breeding short plant and the F, produced is self pollinated to produce F 2 ratio of true breeding tall and true breeding short plant in F 2 will be (a) 1 : 2 (b) 1 : 1 (c) 2 : 1 (d) 1 : 3 82. Two bacteria found to be very useful in genetic engineering experiments are (a) Nitrosomonas and Klebsiella (b) Escherichia and Agrobacterium (c) Nitrosomonas and Azotobacter (d) Rhizobium and Diplococcus 83. (a) (c) (d) Tryptophan (trp) operon is repressible system (b) inducible system controlled by three structural genes controlled by regulator gene 73 84. the (a) (c) In DNA replication, which type of enzyme unwinds helix? topoisomerase (b) primase DNA polymerase (d) helicase 85. An abnormal gene is replaced by normal gene. It is called (a) gene therapy (b) cloning (c) mutation (d) gene cloning 95. Technique using b o d y ' s water m o l e c u l e s f o r obtaining images is (a) sonography (b) digital subtraction angiograph (c) radioactive tracers (d) MRI 86. Which of the fossil men given below was expert in making tool, weapons, paintings etc? (a) java ape man (b) peking man (c) rhodesian man (d) cro-magnon man 96. In cellular totipotency roots can be induced by (a) lower concentration of cytokinins and higher concentration of auxins (b) higher concentration o f cytokinins and lower concentration of auxins (c) both in equal proportions (d) only auxins and no cytokinins 87. The biggest opponent of Lamarck was (a) G. Cuvier (b) A. Weismann (c) I. Pavlov (d) Kamrer 97. The scientific study of human population is (a) ecology (b) demography (c) biogeography (d) eugenics 88. Which of the following relieves pain and calm excitements? (a) morphine (b) quinine (c) turmeric (d) resperine 98. Which of the f o l l o w i n g is upright in all t h e ecosystems? (a) pyramid of number (b) pyramid of energy (c) pyramid of biomass (d) all of these 89. G r o w t h of h u m a n p o p u l a t i o n is r e p r e s e n t e d currently by (a) lag phase (b) stationary phase (c) exponential phase (d) exponential phase almost terminating stationary phase 90. Triticale is man-made cereal obtained through hybridisatioirbctween (a) wheat and rye (b) wheat and rice (c) wheat and oat (d) wheat and gram 91. (a) (c) (d) T-cells respond to the pathogens by producing killer T-cells (b) helper T-cells suppressor T-cells killer T-cells, helper T-cells and suppressor T-cells 92. Western blot test is used for confirmation of (a) filaria (b) anaemia (c) malaria (d) AIDS 93. Which of the following is not a part of the body's nonspecific defense system? (a) complement (b) interferons (c) antibodies (d) inflammation 94. Which one of the following techniques is used for improving blood supply to cardiac muscles? (a) pacemaker (b) intra-aortic balloon pump (c) ultra sound imaging (d) laser photo-bleaching 74 99. When little rivulets of running water cut small channels in the soil, the process is called (a) sheet erosion (b) rill erosion (c) gully erosion (d) ravine erosion 100. Pollutant that reduces oxygen carrying capacity of the blood is (a) S 0 2 (b) CO (c) C 0 2 (d) N O ANSWERS 1. 6. 11. 16. 21. 26. 31. 36. 41. 46. 51. 56. 61. 66. 71. 76. 81. 86. 91. 96. (a) (a) (d) (c) (c) (a) (b) (d) (d) (d) (a) (d) (b) (b) (c) (c) (b) (d) (d) (a) 2. 7. 12. 17. 22. 27. 32. 37. 42. 47. 52. 57. 62. 67. 72. 77. 82. 87. 92. 97. (b) (c) (d) (b) (b) (d) (b) (b) (c) (a) (a) (c) (a) (a) (a) (b) (b) (b) (d) (b) 3. 8. 13. 18. 23. 28. 33. 38. 43. 48. 53. 58. 63. 68. 73. 78. 83. 88. 93. 98. MT (b) (b) (b) (a) (a) (c) (c) (a) (d) (d) (a) (a) (c) (c) (a) (b) (a) (a) (c) (b) 4. 9. 14. 19. 24. 29. 34. 39. 44. 49. 54. 59. 64. 69. 74. 79. 84. 89. 94. 99. (d) (c) (d) (a) (a) (a) (c) (b) (c) (b) (b) (b) (d) (a) (d) (d) (d) (c) (b) (b) 5. 10. 15. 20. 25. 30. 35. 40. 45. 50. 55. 60. 65. 70. 75. 80. 85. 90. 95. 100. (d) (b) (a) (b) (b) (d) (a) (b) (d) (a) (d) (b) (d) (a) (a) (b) (a) (a) (d) (a) •• • B I O L O G Y TODAY | FEBRUARY '07 74 For E N G L I S H , INTELLIGENCE & LOGICAL R E A S O N I N G : AIIMS, AFMC, U G E T ENGLISH Directions (Q. 1 to Q.5) : In these questions, choose the word which best expresses the meaning of the given words. 1. Adamant unyielding (a) (c) obnoxious (b) cruel (d) mean 2. Indifferent (a) unlawful (c) importable (b) bloody (d) fickle 3. Redundant (a) warm («•) advanced (b) superfluous (d) irksome 4. Rampant (a) widespread (c) contagious (b) ravaging (d) livid 5. Verdant (a) ever flowing (c) reluctant (b) green (d) fragrant Directions (Q. 6 to Q.10) : In these questii the word opposite in meaning to the given 6. Curse (a) torment (c) bless (b) swear (d) damn 7. Recover (a) relapse (c) improve (b) retrieve (d) redeem 8. Taken aback (a) confused (c) anticipated (b) dumb-founded (d) worried 9. Stagger stumble (a) (c) totter (b) steady (d) startle 10. Emaciated (a) debilitated (c) gaunt (b) decrepit (d) robust MT BIOLOGY TODAY | MARCH '07 Manipal and o t h e r competitive exams. Directions (Q. 11 to Q.13) : In these questions, out of the four words given, one word in misspelt. Find this misspelt word. 11. (a)sucess (c) digress (b) process (d) regress 12. (a) attention (c) suggestion (b) tention 13. (a) mediocre (c) fluterred (b) ordinary (d) flustered (d) digestion Directions (Q. 14 to Q.16) : Fill in the blanks suitable prepositions. 14. the (a) (c) with The driver was unable to account accident. about (b) for of (d) on 15 detected. (a) about (c) upon investigation, the theft could be (b) to (d) for 16. Slums have encroached (a) by (b) upon (c) to (d) in his land. Directions (Q. 17 to Q.20) : In these questions, of the sentences have errors and some have none. out which part of a sentence (a), (b) or (c) has an and mark that part as your answer. If there is no then mark (d) as your answer. some Find error error, 17. 1 have passed (a)/ the examination (b)/ two years ago. (c)/ No error (d) 18. Unless you do not give (a)/ the keys of the safe (b)/ you will be shot, (c)/ No error (d) 19. The value of the dollar (a)/ declines as the rate (b)/ of inflation raises, (c)/ No error (d) 20. A hot and (a)/ a cold spring (b)/ was found near each other, (c)/ No error (d) 27 Directions (Q. 21 to Q.22) : In these questions, four alternatives are given for the underlined idiom/phrase. Choose the alternative which best expresses the meaning of the underlined idiom/phrase. 21. (a) (b) (c) (d) To fight tooth and nail to fight a losing battle to oppose resolutely to have a physical fight to lodge a formal protest 22. The green-eved monster strikes a woman the moment she sees her husband talking to another pretty woman. (a) anger (b) hatred (c) envy (d) jealousy Directions (Q. 23 to Q.25) : In these questions, out of the four alternatives, choose the one which can be substituted for the given words/sentence. 23. One who does not follow the rural rules of social life. (a) bohemian (b) artisan (c) partisan (d) physician 24. One who believes that gaining pleasure is the most important thing in life. (a) hedonist (b) pessimist (c) misanthrope (d) philistine 25. Property handed down after the death of a person, (a) legacy (b) legend (c) patrimony (d) inheritance INTELLIGENCE & LOGICAL REASONING Directions (Q. 26) : Answer this question based on the following information. Five men A, B, C, D and E read newspaper. The one who reads first gives it to C. The one who reads last had taken it from A. E was not the first or the last to read. There were two readers between B and A. 26. B passed the newspaper to whom? (a) A (b) C (c) D (d) E 27. 162.498 - ? = 87.4 + 75 (a) 0.98 (b) 0.098 (c) 9.098 (d) 75.047 28. Which of the following pairs is odd one out ? (a) love, affection (b) abundance, scarcity (c) false, true (d) sharp, blunt 29. Complete the series : 28 1, 3, 10, 21, 64, 129, ?, 777 (a) 356 (b) 259 (c) 388 (d) 144 30. If fifth of the month falls two days after Monday, what day of the week will precede the 19th of the month? (a) friday (b) Wednesday (c) Saturday (d) tuesday 31. If 5 boys write 5 pages in 5 minutes, in how many minutes can one boy write one page ? 1 minute (b) (a) 1 minute 5 (d) 2.5 minutes (c) 5 minutes 32. Candle is to Sun as (a) lagoon (b) boat (c) pond (d) puddle is to Sea. 33. If BAD is coded as YZW and FIGHT is coded as URTSG. How will you encode HIGH ? (a) TRST (b) SRTS (c) STSR (d) TSRT 34. A watch gains 12 seconds every 3 hours, what time will it show at 10 AM on Tuesday if the watch is set right at 3 AM on Sunday? (a) 09 hrs 58 minutes (b) 09 hrs 57 minutes 8 seconds (c) 10 hrs 2 minutes (d) 10 hrs 3 minutes 40 seconds 35. The given figure is a drawing of pile of blocks. When taken apart, how many b l o c k s w o u l d be there? (a) 15 (b) 14 (c) 10 (d) 5 36. In the diagram given below each triangle represents t h e c u s t o m e r s w h o have T.V. c h a n n e l connections. Which triangle(s) show the subscribers who have c o n n e c t i o n s of all t h e channels? (a) ZEE (b) SONY (c) STAR & UDAYA (d) ZEE & SONY ""BIOLOGY TODAY | MARCH '07 37. Which consonant among the given responses is common if three meaningful words are made from the given letter? RTYFD (a) R (b) T (c) F (d) D 38. In this question, arrange the items in a meaningful order. (2) doctor (1) cure (4) diagnosis (3) disease (5) medicine (b) 2, 4, 3, 5, 1 (a) 3, 2, 4, 5, 1 (d) 4, 2, 3, 5, 1 (c) 4, 3, 2, 5, 1 Directions (Q. 39 to Q.41) : In these questions, a series is given with one term missing. Choose the correct alternative from the given ones that will complete the series. 39. B, D, F, I, L, P, ? (a) U (b) R (c) S (d) T 40. C, E, I, K, O, Q, ? (a) R (b) S (c) T (d) U 41. A C B E C G D ? (a) H E (b) E I (c) I E (d) F E 42. F is (a) (c) A is B's brother, C is A's mother, D is C's father, A's son. How is B related to F's child ? aunt (b) cousin nephew (d) grandfather 43. Laxman went 15 km towards North. Then he turned West and covered 10 km. Then he turned South and covered 5 km. Finally turning towards East, he covered 10 km. In which direction is he from his house ? (a) east (b) west (c) north (d) south 44. Sonu is taller than Yatendra. Amit is taller than Sonu. Subhash is taller than Amit. Sattu is tallest of all. If they stand according to their height, then who will be exactly in the middle? (a) Sonu (b) Subhash (c) Yatendra (d) Amit 45. Question Figures o * 29" " B I O L O G YTODAY | MARCH '07 Answer Figures (a) (b) (c) «0 46. Find the missing letters of the series cab _ c _ bd ca _ d _ abd (a) d, a, b, c (b) c, c, a, a (c) b, c, d, a (d) a, b, c, d 47. will (a) (c) Which of the following numbers when added to 7, be divisible by 11 ? 115 (b) 56 3 (d) 2006 Directions (Q. 48): Study the given numerals to answer the question. 4536467365423453642357836732 1 2 3 5 3 6 5 6 7 3 6 7 3 6 4 1 2 5 436 48. How many' 3's are followed b y ' 6' but not preceded by '4' ? (a) 8 (b) 7 (c) 6 (d) 5 49. If A is equal to 1, then what is the difference between LOCK and KEY ? (a) 10 (b) 20 (c) 0 (d) 30 50. From the given alternative words, select the one which cannot be formed using the letters of the given word ? MANIFESTATION (a) ESTIMATE (b) FASTEN (c) NATIONAL (d) MISSION ANSWERS 1. 6. 11. 16. 21. 26. 31. 36. 41. 46. (a) (c) (a) (b) (b) (b) (c) (c) (c) (a) 2. 7. 12. 17. 22. 27. 32. 37. 42. 47. (d) (a) (b) (a) (c) (b) (c) (a) (d) (d) 3. 8. 13. 18. 23. 28. 33. 38. 43. 48. (b) (e) (c) (a) (a) (a) (b) (a) (c) (b) 4. 9. 14. 19. 24. 29. 34. 39. 44. 49. (a) (b) (b) (c) (a) • (c) (d) (d) (d) (c) 5. (b) 10. (d) 15. 20. 25. 30. 35. 40. 45. 50. (c) (c) (c) (d) (b) (d) (d) (c) • • G E N E R A L KNOWLEDGE For : AIIMS AFMC UGET Manipal 1. Who among the following has not been elected twice as the speaker of Lok Sabha? (a) G.M.C. Balayogi (b) P.A. Sangma (c) Dr. Balram Jakhar(d) N. Sanjiva Reddy. 2. Which planet is smaller than the Earth's moon? (a) mercury (b) mars (c) pluto (d) neptune. 3. Naushad who died recently was a famous (a) politician (b) social worker (c) music director (d) sports personality. 4. Who amongst the following players became the first batsman to score 14,000 runs in One Day Internationals (ODIs)? (a) Rahul Dravid (b) Sachin Tendulkar (c) Ricky Ponting (d) Inzamam U1 Haq. 5. 'cMango' whose name was in news recently is a company based in (a) USA (b) South Korea (c) China (d) Japan. 6. Norman Borlaug Awards are given for excellence in which of the following areas? (a) sports (b) journalism (c) politics (d) agriculture. 7. Who a m o n g the f o l l o w i n g is Forbes 'Businessman of the Year' for 2006? (a) Anil Ambani (b) Nandan Nilekani (c) Sunil Mittal (d) Vijay Mallya. Asia's 8. Which State is the largest producer of rubber in India? (a) Tamil Nadu (b) Karnataka (c) Kerala (d) Andhra Pradesh. 9. Which one of the following is the third most populous country of the world? (a) United States of America (b) Brazil (c) Argentina (d) Indonesia. 10. Which one of the following has been proclaimed by UNESCO as a masterpiece of oral and intangible heritages of humanity? (a) Pnrana (b) Ramlila 35 ""BIOLOGY TODAY | MARCH '07 (c) Gita 11. (a) (c) (d) and other competitive exams. (d) Mahabharata. Who was the founder of IN A? Bhagat Singh (b) Bal Gangadhar Tilak Subhash Chandra Bose Chandershekhar Azad. 12. The first two digits from left of pincode indicate (a) post office (b) district (c) postal zone (d) state. 13. Vikram Sarabhai Space Centre is located in (a) Peenya (b) Gujarat (c) Trivandrum (d) Dehradun. 14. The teeth used by a man for biting are called (a) incisors (b) canines (c) molars (d) premolars. 15. Haft is the name of a (a) religious tax (b) contagious disease (c) novel (d) ballistic missile. 16. (a) (b) (c) The source of the Sun's energy is the process of photoelectric emission nuclear fission nuclear fusion (d) thermionic emission. 17. (a) (c) (d) Pycnometer is an instrument used to measure the density (b) intensity of solar radiation intensity of earthquake high temperatures. 18. 'Bull' in Buddhism is associated with which event of Buddha's life? (a) birth (b) great departure (c) enlightenment (d) mahaparinirvan. 19. city (a) (c) Lahore was Ranjeet Singh's Political Capital. Which was called his Religious Capital? Amritsar (b) Anandpur Sahib Gujranwala (d) Peshawar. 20. Who is the author of Harry Potter Book Series? (a) Charles Dickens (b) Nick Middleton (c) J. K. Rowling (d) Edward Klein. 21. Which one of the following is not a constitutional body? (a) Election Commission „ .. Contd. on page no. 48 % Practice Test Paper for E x a m on -2007 CBSE (PMT) 1st April 2007 ~ X' (Full length) PHYSICS 2 19.6 m below, then velocity of water at turbine, is (Take g = 9.8 m/s 2 ) (a) 9.8 m/s (b) 19.6 m/s (c) 39.2 m/s (d) 98.0 m/s 3 1. ML T" are the dimensions of (a) work (b) power (c) momentum (d) force 2. A stone dropped from the top of the tower touches the ground in 4 sec. The height of the tower is (a) 78.4 m (b) 52.2 m (c) 24.0 m (d) 12.8 m 3. A body constrained to move in Y direction, is subjected to a force given by F = ( - 2/+15 j + 6 k)N. What is the workdone by this force in moving the body through a distance of 10 m along Y axis? (a) 190 J (b) 160 J (c) 150 J (d) 20 J 4. The angular speed of an engine wheel making 90 revolutions per minute is (a) 1 .5TE rad/s (b) 3n rad/s (c) 4.571 rad/s (d) 671 rad/s 5. A ball is projected horizontally from the top of a tower with a velocity of 4 ms - 1 . The velocity of the ball after Is is (Take g = 10 ms" 2 ) ms (d) 3 ms" (a) 11 ms"1 (b) 9 ms" 1 (c) 6. . A mass M o f 100 kg is suspended with use of strings A, B and C as shown in figure, where W is vertical wall and R is a rigid horizontal rod. The tension in string B is (a) lOOgN (b) 0 (c) 100V2g N 90° r M = 100 kg w. 100 (d) X! g N 7. 300 (a) (c) If the force on a rocket moving with a velocity of m/s is 210 N, then the rate of combustion of fuel is 0.7 kg/s (b) 1.4 kg/s 0.07 kg/s (d) 10.7 kg/s 8. If water falls from a dam into a turbine wheel 36 9. A bomb of mass 30 kg at rest explodes into two pieces of masses 18 kg and 12 kg. The velocity of 18 kg mass is 6 ms"1. The kinetic energy of the other mass is (a) 524 J (b) 256 J (c) 486 J (d) 324 J 10. The escape velocity on the surface of the Earth is 11.2 km/s. What would be the escape velocity on the 1 surface of another planet of the same mass but — times the radius of the Earth? (a) 44.8 km/s (c) 5.6 km/s 11. (a) (b) (c) (d) (b) 22.4 km/s (d) 11.2 km/s There is no atmosphere on moon as it is closer to Earth it revolves around the Earth it gets light from the Sun the escape velocity of gas molecules is less than their r.m.s. velocity on moon . 12. The temperature of an ideal gas is increased from 120 K to 480 K. If at 120 K, the root mean square velocity of gas molecules is v, at 480 K it becomes (a) 4v (b) 2v (c) v/2 (d) v/4 13. A wooden block, with a coin placed on it top, floats in water as shown in figure. The distances I and h are shown there. After some time, the coin falls into the water. Then (a) / decreases and h increases (b) I increases and h decreases (c) both I and h increases (d) both / and h decreases Coin 14. Water rises upto a height h in a capillary tube of certain diameter. This capillary tube is replaced by a similar tube of half the diameter. Now water will rise to the height of (a) Ah (b) 3h (c) 2/7 (d) h!2 " " B I O L O G Y T O D A Y | MARCH '07 15. An e n g i n e h a s an e f f i c i e n c y o f r When temperature of sink is reduced by 62°C, its efficiency is doubled. Temperature of source and sink are (a) 99°C, 37°C (b) 124°C, 62°C (c) 37°C, 99°C (d) 62°C, 124°C 16. A sample of ideal gas (y = 1.4) is heated at constant pressure. If 100 J of heat is supplied to the gas, the work done by the gas is (a) 28.57 J (b) 56.54 J (c) 38.92 J (d) 6 5 3 8 J 17. An ideal gas is taken through a cycle ABCA as shown in the PV diagram. The work done during the cycle is (a) \PV (b) 2PV J B(2P, V) C(2P, 3 V) A(P, V) (c) 4PV (d) PV 23. When an open pipe is producing third harmonic, number of nodes is (a) 1 (b) 2 (c) 3 (d) 4 24. The electric potential at a point on the axis of an electric dipole depends on the distance x of the point from the dipole as 1 (a) 1 (b) (d) = JC (c) 25. A parallel plate capacitor has a capacitance of 50 pF in air and 105 pF when immersed in oil. The dielectric constant of the oil is (a) 50/105 (b) 1 (c) 2.1 (d) <*> 26. What is effective capacitance between point A' and Y as shown in the figure? C, = 6|iF 18. The time period of a simple pendulum inside a stationary lift is J s second. What will be the time period Q = 6|xF C , = 20jxF C , = 6 n F in s e c o n d w h e n t h e lift m o v e s u p w a r d s w i t h an B acceleration of g/4? (a) 2 (b) V? (c) (d) (2 + V5) 2V5 (a) 6 |J.F 19. Two springs of the same material and same length have their tensions in the ratio 4 : 1 and radii in the ratio 2 : 1 . The ratio of their fundamental frequencies is (a) 2 (b) | (c) 1 (a) (d) 4 20. A particle has displacement y is given by y = 3sin(5m + Tt) where y is in metre and t is in second. What are frequency and period of motion? (a) 0.4 Hz, 2.5 s (b) 2.5 Hz, 0.4 s (c) 2.5 Hz, 2.5 s (d) 0.4 Hz, 0.4 s 21. Two springs of spring constants kx and k, arejoined in series. The effective spring constant of the combination is given by ^ k (c) (&,+£,) 2 (b) (*,+ i y / 2 (d) k,k2/(kl+k2) 22. When a source is going away from a stationary observer with the velocity equal to that of sound in air, then the frequency heard by observer will be (a) same (b) double (c) half (d) one third 37" " B I O L O G YT O D A Y | MARCH '07 (b) 12 nF (c) 18 [iF (d) 24 ^ F 27. Energy per unit volume for a capacitor having area A and separation d kept at potential difference V is given by (c) (a) D C, = 6|liF 1 ICV 2 V (b) 2 (d) 1 V 2s0 d Si 2C 28. Find the resistance of a circuit bet ween A and B in the figure given below RQ -wwwv- (a) 3 R (b) R/3 /?a •AAAAAAAR- (c) -VWWVV- 3R 2 (d) 2R — J 29. Five cells each of internal resistance 0.2 £2 and e.m.f. 2 V are connected in series with a resistance of 4 Q. The current through the external resistance is (a) 4 A (b) 2 A (c) 1 A (d) 0.5 A 30. A metallic wire of 40 Q resistance is drawn to double its length. Its new resistance will be (a) 20 Q. (b) 80 Q (c) 160 Q (d) 320 Q 31. (a) (b) (c) (d) Specific resistance of a conductor increases with increase in temperature increase in cross-section area increase in cross-section area and decrease in length decrease in cross-section area 32. A bulb of 100 W, 220 V is operated on a line of 110 V. then what will be the power consumed? (a) 25 W (b) 75 W (c) 50 W (d) 90 W 33. Lorentz force can be calculated by using the formula (a) F = q(E + vxB) (b) F = (c) F-q (d) F = q(ExB (E+v-B) q(E-vxB) + v) 34. A long solenoid is formed by winding 20 turns/cm. The current necessary to produce a magnetic field of 20 milli tesla inside the solenoid will be approximately (a) 1.0 A (b) 2.0 A (c) 4.0 A (d) 8.0 A 35. At a certain place, the horizontal component of the Earth's magnetic field is B0 and the angle of dip is 45°. The total intensity of the field at that place will be (at B0 (b) J2B0 (c) 2B 0 (d) fi02 36. During a current change from 2 A to 4 A in 0.05 second, 8 V of emf is developed in a coil. The coefficient of self-induction is (a) 0.1 H (b) 0.2 H (c) 0.4 H (d) 0.8 H 37. A step-up transformer has transformation ratio of 3 : 2. What is the voltage in secondary, if voltage in primary is 30 V? (a) 45 V (b) 15 V (c) 90 V (d) 300 V 38. Heat radiations propagate with the speed of (a) a-rays (b) (3-rays (c) light waves (d) sound waves 39. If wavelength of a wave is X = 6000 A, then wave number will be (a) 1.66 x 107 n r 1 (b) 1.66 * 10b n r 1 1 (c) 16.6 x lO-i n r (d) 166 x 103 n r 1 40. For which property are electrons used in an electron microscope? (a) wave nature (b) negative charge (c) spin (d) none of these 41. If the critical angle for total internal reflection from a medium to vacuum is 30°, the velocity of light in the medium is (a) 3 x 10 s m/sec (b) 1.5 x' 10 s m/sec (e) 38 6 108 m/sec (d) v^xlO* in/sec 42. Angle of deviation (8) by a prism (refractive index and supposing the angle of prism A to be small) can be given by (a) 5 = ( n - 1 )A (c) sin 8 =sin (b) 8 = (n + 1 )A x A (A/2) 43. A light ray is incident normally on a plane mirror. The angle of reflection will be (a) 135° (b) 90° (c) 45° (d) 0° 44. A charged oil drop of mass 9.75 x 10 -15 kg and charge 30 x 10 -16 C is suspended in a uniform electric field existing between two parallel plates. The field between the plates is (Take g = 10 m/s 2 ) (a) 3.25 V/m (b) 300 V/m (c) 325 V/m (d) 32.5 V/m 45. For photoelectric emission, tungsten requires light of wavelength 2300 A. If light of wavelength 1800 A is incident then emission (a) takes place (b) don't take place (c) may or may not take place (d) depends on frequency 46. Which one of the following nuclear reaction is a source of energy in the Sun? (a) 4 Be 9 + 2 He 4 - > 6 C 12 + 0n< 4 (b) 2 He 3 + 2 He 3 2 He + ,H' + ,H' 144 92 235 (c) ss Ba + 36 Kr + ^ 92 U (d) 26 Fe 50 + 4gCa" 2 —> 74W16' + 0 «' 47. The density of nucleus is of order of (a) 103 kg/m 3 (b) 1012 kg/m 3 17 3 (c) 10 kg/m (d) 10 24 kg/m 3 48. The value of current in the following diagram will be 200S2 +5V - 0 1 — (a) 0 amp (c) 10 amp -wvww- +3V —• (b) 10"2 amp (d) 0.025 amp 49. A gate has the following truth table P Q R 1 1 1 1 0 0 0 1 0 0 0 0 The gate is (a) NOR • (b) OR (c) NAND (d) AND 50. Avalanche breakdown in a semiconductor diode occurs when ""BIOLOGY TODAY | MARCH '07 (a) (b) (c) (d) forward current exceeds a certain value reverse bias exceeds a certain value forward bias exceeds a certain value the potential barrier is reduced to zero (a) (b) CHEMISTRY 51. KMnO„ oxidises oxalic acid in acid medium. The number of C 0 2 molecules produced as per the balanced equation is (a) 10 (b) 8 (c) 5 (d) 3 I 52. The phase diagram for iL the pure solvent (solid atro lines, and the solution p (non-stable solute) (dashed lines) are recorded. The quantity indicated by L in the figure is (a) AP (b) A7> (c) K/m (d) Kh • m s • L 4- 54. The m a j o r organic product formed from the following reaction is (i) CH NH > < (ii) LiAlH (iii) H 0 3 4 2 2 > O - NHCH, < (b) (c) > NHCHj < OH (d)> < NHCH, OH 55. A bottle of cold drink contains 200 ml liquid in which C 0 2 is 0.1 molar. Suppose C 0 2 behaves like an ideal gas, the volume of the dissolved C 0 2 at STP is (a) 0.224 litre (b) 0.448 litre (c) 22.4 litre (d) 2.24 litre 56. An exothermic chemical reaction occurs in two steps as follows : (i) A + B -> X (fast) ; (ii) X-> AB (slow) ; The progress of the reaction can be best represented by 39 ""BIOLOGY TODAY | MARCH '07 (d) all are correct (c) & » 58. Which of the following ore is chloride? 53. Four successive members of the first row transition elements are listed below with their atomic numbers. Which one of them is expected to have the highest third ionisation enthalpy? (a) vanadium (Z = 23) (b) chromium (Z = 24) (c) manganese (Z = 25) (d) iron (Z = 26) .0 —AB 57. Which of the following hormone contains iodine? (a) adrenaline (b) testosterone (c) thyroxine (d) insulin / y T A+B (a) bauxite (c) magnesite (b) zincite (d) horn silver 59. In which of the following reactions, there is no change in valency? (a) 4 KC10 3 3 KCIO4 + KC1 (b) S0 2 + 2 H 2 S 2 H20 + 3 S (c) Ba0 2 + H 2 S0 4 BaS0 4 + H 2 0 2 (d) 2 BaO + 0 2 2 Ba02 60. The three sets of elements are given below (i) boron, aluminium, gallium, beryllium (ii) boron, aluminium, gallium, indium (iii) boron, aluminium, thallium, rubidium Which of the above set/s contain (s) an element which does not belong to group 13 and yet its properties are quite similar to one of the group 13 elements? (a) (ii) (b) (iii) (c) (i) (d) (i) and (iii) 61. The relative rate of esterification of the following acids with methanol follows the order (a) RCH 2 COOH < R 2 CHCOOH < R 3 CCOOH (b) RCH 2 COOH > R 2 CHCOOH > R3CCOOH (c) RCH 2 COOH > R3CCOOH < R 2 CHCOOH (d) R3CCOOH > RCH 2 COOH > R 2 CHCOOH 62. has (a) (b) (c) (d) Carbon monoxide acts as a Lewis base because it a double bond between C and O atoms a triple bond between C and O atoms a lone pair of electrons on the C atom two lone pairs of electrons on the O atom 63. The existence of a substance in more than one solid modifications is known as (a) isomorphism (c) amorphism (b) polymorphism (d) allotropy 64. Increasing pK a values of o, m and /7-cresols is (a) o < p < m (b) m < p < o (c) m < o < p (d) p < o < m 65. An oxide of nitrogen has The total number of electrons compound (at. no. N = 7, O = (a) 14 (b) 15 (c) a molecular weight 30. in one molecule of the 8) is 7 (d) 16 66. Schiff's bases are formed when aniline is condensed with (a) phenols (b) aryl chlorides (c) aromatic aldehydes (d) aliphatic alcohols 67. Which of the following plots represents correctly the variation of equivalent conductance (A) with dilution for a strong electrolyte? (b) t T I T T (c) t T T t t (d) T t T t 71. An ester used as medicine is (a) ethyl acetate (b) methyl acetate (c) methyl salicylate (d) ethyl benzoate 72. Which of t h e f o l l o w i n g pairs form the same osazone? (a) glucose and fructose (b) glucose and galactose (c) glucose and arabinose (d) lactose and maltose 73. Colloid of which one of the following can be prepared by electrical dispersion method as well as reduction method? (a) sulphur (b) ferric hydroxide (c) arsenious sulphide (d) gold 74. Which one of the following is not an essential amino acid? (a) valine (b) leucine (c) lysine (d) alanine (a) 75. When an organic compound was treated with sodium nitrite and HC1 in the ice-cold, nitrogen gas was evolved. The compound is (a) a nitro compound (b) a primary amine (c) a secondary amine (d) a tertiary amine 76. The atomic number of Sn is 50. The shape of gaseous SnCl, molecule is (c) Dilution - Dilution 68. The m e m b e r s W, X, Y and Z of the naturally occurring radioactive series are related as W ^ + X - Y- -P-*• 3d 40 u T CI (c) 7 0 / Which of the following arrangements of electrons is most likely to be stable? 4I T Sn (b) CI CI 69. One of the acid listed below is formed from P 2 0 , and the rest are formed from P 2 0_. The acid formed from phosphorus (III) oxide is (a) HPO, (b) H 4 P 2 0 7 (c) H , P 0 4 (d) H 3 PO, T CI—Sn—CI Z The isobars among the above are (a) W and X (b) W and Y (c) W and Z (d)XandZ (a) (a) t Sn (d) IC I CI CI 77. The correct s e q u e n c e of i n c r e a s i n g c o v a l e n t character is represented by (a) LiCl < NaCl < BeCl, (b) BeCl 2 < LiCl < NaCl (c) NaCl < LiCl < BeClJ (d) BeCl, < NaCl < LiCl 78. Which of the following structures represents a nitrolic acid? NO, (a) R C = NOH (b) R-C=NOH " " B I O L O G Y T O D A Y | MARCH '07 (c) NO I R2C-N02 (d) R N - N = O 79. The oxide which acts as a reducing, oxidising, bleaching agent and Lewis base is (a) S 0 2 (b) S 0 3 (c) C 0 2 (d) NO 80. T h e increasing order of melting point of the following hydrides is (a) NH 3 < PH. < AsH, < SbH, (b) PH. < NH, < AsH, < SbH, (c) PH, < AsH, < SbH. < N H j (d) AsH 3 < SbH, < NH 3 < PH, 81. The value of En (a) - 0 . 2 0 7 V (c) 0.207 V 0/H (J atm) /Pt at 298 K would be (b) - 0 . 4 1 4 V (d) 0.414 V 82. The table given below lists the bond dissociation energy (£ dlss ) for single covalent bonds formed between C and atoms A, B, D and E Bond £ d i s s (kcal mol" 1 ) C—A C—B 240 382 276 486 C—D C—E Which of the following atoms has smallest size? (a) D (b) E (c) A (d) B 83. Which of the following is used as a dehydrating agent in the conversion of acetic acid into acetic anhydride? (a) concentrated sulphuric acid (b) anhydrous calcium oxide (c) anhydrous aluminium chloride (d) phosphorus pentoxide 84. In a reaction. CH, — CH2 liypochlorus acid » CH2OH M CH2OH where M = molecule and R = reagent. M and R are respectively (a) CH.CHjCl and NaOH (b) CH2C1 - CH,OH and KOH (c) CH,CH 2 OH and HC1 (d) CH 2 = CH 2 and H N 0 3 85. Hydrolysis of one mole of peroxodisulphuric acid produces (a) two moles of sulphuric acid (b) two moles of peroxomonosulphuric acid 41" " B I O L O G YT O D A Y | MARCH '07 (c) one mole of sulphuric acid and one mole of peroxomonosulphuric acid (d) o n e m o l e of s u l p h u r i c a c i d , o n e m o l e of peroxo m o n o s u l p h u r i c acid and one mole of hydrogen peroxide 86. Which one of the following mixed sulphates is not an alum? (a) K 2 S0 4 • A1 2 (S0 4 ) 3 • 2 4 H 2 0 (b) K 2 S0 4 • Cr 2 (S0 4 ) 3 • 2 4 H , 0 (c) Na 2 S0 4 • Fe 2 (S0 4 ) 3 • 2 4 H 2 0 (d) CuS0 4 • A1 2 (S0 4 ) 3 • 2 4 H 2 0 87. Which of the following oxides of nitrogen will be the most stable one? (a) 2 N 0 2 (g) N 2 (g) + 2 0 2 (g), K = 6.7 x 10 16 mol L"1 (b) 2 NO (g) — N 2 (g) + 0 2 (g), K = 2.2 x 1030 (c) 2 N 2 0 5 ( g ) ^ 2 N 2 ( g ) + 5 0 2 (g), K = 1.2 x 1024 mol 5 L"5 (d) 2 N 2 0 ( g ) ^ 2 N 2 ( g ) + 02(g), K = 3.5 x 10" mol L"1 88. The most suitable method of the separation of a mixture of ortho and /wra-nitrophenoi n.ixed in the ratio of 1 : 1 is (a) distillation (b) crystallisation (c) vapourisation (d) colour spectrum 89. Which of the following molecules has trigonal planar geometry? (a) BF3 (b) NH 3 (C) PCI, (d) IF, 90. In a set of reactions acetic acid yielded a product D. CH3COOH SOCI, benzene A HCN ->B anhy. A1C13 > C HOH The structure of D would be COOH (a) CH2 - C - ch 3 CN ^ OH OH (c) CH2 - C • CH, CN (d) I C - C H ,3 I OH OH I C-COOH I CH, 91. A greenish yellow gas reacts with an alkali metal hydroxide to form a halate which can be used in fire works and safety matches. The gas and halate respectively are (a) Br2, KBrO, (b) Cl 2 , KC10 3 (c) I2, NalO, (d) Cl2, NaCIO, 92. for (a) (b) (c) (d) Which one of the following reactions is an example calcination process ? 2 Ag + 2 HC1 + (O) 2 AgCl + H 2 0 2 Zn + 0 2 —» 2 ZnO 2 ZnS + 3 0 2 2 ZnO + 2 S 0 2 M g C 0 3 ™> MgO + C 0 2 93. The pH of a solution is 7.00. To this solution sufficient base is added to increase the pH to 12.0. The increase in OH" ion concentration is (a) 5 times (b) 1000 times (c) 105 times (d) 4 times 94. Which of the following concentrated solution will be able to dissolve Zn metal? (a) (NH 4 ) 2 C0 3 (b) NaCl (c) NaOH (d) NaHCO, 95. When mercuric iodide is added to the aqueous solution of potassium iodide (a) boiling point does not change (b) freezing point is raised (c) freezing point is lowered (d) freezing point does not change 96. pH of pure water was found to be 6.63. The temperature of water is (a) 298 K (b) < 298 K (c) > 298 K (d) cannot be predicted 97. The main reason for larger number of oxidation states exhibited by the actinoids than the corresponding lanthanoids is (a) more energy difference between 5 / a n d 6d orbitals than between 4 / and 5d orbitals (b) lesser energy difference between 5/and 6d orbitals than between 4 / and 5d orbitals (c) smaller atomic size of actinoids than the lanthanoids (d) lesser reactive nature of the actinoids than the lanthanoids 98. In the reaction, I 2 + I I J , the Lewis base is (a) I2 (b) I(c) IJ 99. Tetragonal crystal dimensions (a) a = b = c and a = (b) a = b * c and a = (c) a * b * c and a = (d) a = b * c and a = (d) none of these system has following unit cell 3 = y = 90° (3 = y = 90° 3 = y = 90° P = 90°, y = 120° 100. Which of the following is the electron deficient molecule? (a) C 2 H 6 (b) B 2 H 6 (c) SiH 4 (d) PH 3 42 8I0L0 101.Silviculture concerned with (a) cultivation of (b) cultivation of (c) cultivation of (d) cultivation of is a br of botany, w h i c h is fruit-yielding trees timber-yielding trees silver fern ornamental trees 102.The r e g u l a t i o n by an o r g a n i s m of c h e m i c a l composition of its blood and body fluids and other aspects of its internal environment so that physiological processes can proceed at optimum rates is called (a) metabolism (b) enthalpy (c) entropy (d) homeostasis 103. Hutchinson's primary contribution in the taxonomy is the phylogenetic studies of angiosperms. According to him (a) evolution does not necessarily involve all organs at the same time (b) evolution always involves all the organs of a plant at the same time (c) m o n o c o t y l e d o n s are m o r e p r i m i t i v e t h a n dicotyledons (d) climbers are more primitive than trees 104. Respiratory enzymes are present in bacteria on (a) mitochondria (b) Golgi complex (c) plasma membrane (d) endoplasmic reticulum 105. Photosynthetic protists are (a) slime moulds, euglenoids and diatoms (b) dinoflagellates, diatoms and sarcodines (c) euglenoids, dinoflagellates and diatoms (d) ciliates, dinoflagellates and zooflagellates 106. Classroom cultures of Rhizopus on bread generally do not show any zygospores. This is because (a) the conditions on the bread are not suitable for the formation of zygospores (b) the fungus is generally sterile (c) the gametangia are formed at different places and are unable to fuse in pairs (d) the fungus growing on bread is usual ly of one strain only 107. Which of the f o l l o w i n g g r o u p s i n c l u d e s "amphibians of plant kingdom"? (a) thallophyta (b) bryophyta (c) cormophyta (d) spermatophyta 108. Adaxial outgrowth from the base of the leaf of Selaginella is " " B I O L O G Y TODAY | MARCH '07 (a) (c) ligule stipule (b) velum (d) phyllodes 109. Malarial fever in man coincides with the liberation of which one of the following into the blood? (a) metacryptozoite (b) trophozoite (c) merozoite (d) cryptozoite 110. An association mutually beneficial to both partner is represented by (a) honeybee and man (b) Hydra and waterfleas (c) Zoochlorella and Hydra (d) earthworm and farmer 111. Lateral line system found in fishes has been lost in amphibia because of (a) occurrence of metamorphosis in amphibia (b) evolution of terrestrial habit (c) change over to herbivorous feeding (d) development of sturdy legs 112. Bicarpellary ovary with parietal placentation, tetradynamous condition of stamens and siliqua fruits are characteristic features of the family. (a) asteraceae (b) malvaceae (c) cruciferae (d) caesalpinaceae 113. A lot of starch is stored in potatoes, which are underground. This is made possible by the (a) migration of starch from the aerial parts (b) synthesis of starch by potatoes (c) activity of enzymes which converts starch to sugar and sugar back to starch after it has reached the potato tubers (d) migration of starch from the soil 114. Which of the following is not a characteristic feature of the anatomy of dicotyledonous roots? (a) secondary growth (b) pith little or absent (c) vascular bundles 15-20 (d) radial vascular bundles 117. Cloacal aperture in the frog is the opening of (a) genital duct and urinary bladder (b) urinary bladder and rectum (c) genital duct, urinary bladder and rectum (d) rectum and genital duct 118. An epithelial lining that is one cell thick lying on the basement membrane has cells that are large, taller than wide, but all of them are of same height. This lining is (a) simple columnar epithelium (b) simple squamous epithelium (c) pseudostratified epithelium (d) simple cuboidal epithelium 119. The plasma protein which maintains the osmotic pressure of blood is (a) albumin (b) globulin (c) fibrinogen (d) prothrombin 120. The figures of cork cells as seen by Robert Hooke were published in his book (a) Origin of species (b) Plant kingdom (c) Genera Plantarum (d) Micrographia 121. The chemical substance most abundantly present in the middle lamella is (a) calcium pectate (b) suberin (c) lignin (d) calcium phosphate 1 2 2 . G r a n u l a r e n d o p l a s m i c r e t i c u l u m is m a i n l y concerned with (a) proteolysis (b) peptide bond formation (c) glycosidic bond formation (d) fatty acids & cholesterol synthesis 123. One function of the telomeres in a chromosome is to (a) 'seal' the ends of the chromosomes (b) start RNA synthesis (c) identify the correct member of the homologous pair of chromosomes (d) help two chromatids to move towards poles 115. The function of cork cambium is to produce (a) cork and secondary cortex (b) secondary cortex and phloem (c) cork (d) secondary xylem and secondary phloem 124. For structure of nucleic acid, which of the following statements is wrong? (a) DNA can be single stranded in some viruses (b) RNA can be double stranded occasionally (c) there are as many as 12 bases per turn in Z DNA (d) the length of one helix is 45 A in B DNA 116. (a) (b) (c) (d) 125. T h e s e p a r a t i o n of t w o c h r o m a t i d s of e a c h chromosome at early anaphase is initiated by (a) the interaction of centromere with the chromosomal fibres (b) the elongation of metaphasic spindle How many pair of spiracles-are found in cockroach? 3 pairs in thorax and 10 pairs in abdomen 2 pairs in thorax and 8 pairs in abdomen 2 pairs in thorax and 6 pairs in abdomen 1 pair in thorax and 7 pairs in abdomen 43" " B I O L O G YTODAY | MARCH '07 (c) t h e f o r c e of r e p u l s i o n b e t w e e n t h e divided kinetochores (d) all of the above (b) it promotes stem elongation (c) it promotes cell division (d) it helps hyperelongation 126. Root cap has no role in water absorption because (a) it has no direct connection with the vascular system (b) it has no cells containing chloroplasts (c) it has no root hairs (d) it has loosely arranged cells 135. If a short day plant is grown under conditions of long nights and short days and the dark period is interrupted in the middle by a brief exposure to red light, the plant will (a) flower (b) die (c) fail to flower (d) wilt 127. The insects captured by the insectivorous plants partially fulfill their requirement of (a) enzymes (b) oxygen (c) nitrogen (d) molybdenum 128. Photosynthesis consists of essentially two biological reaction systems, one followed by the other. The second of these systems does which of the following? (a) fixes carbon dioxide (b) traps light energy (c) synthesises starch (d) works only in the presence of light 129. In C 4 plants, Calvin cycle (a) occurs in stroma of bundle sheath chloroplasts (b) occurs in mesophyll chloroplasts (c) occurs in grana of bundle sheath chloroplasts (d) does not occur as C 0 2 is fixed mainly by PEP and no CO, is left for Calvin cycle 130. Which fraction of the visible spectrum of solar radiations are primarily absorbed by carotenoids of higher plants? (a) green and red (b) red and violet (c) violet and blue (d) blue and green 131. Incomplete oxidation of glucose into pyruvic acid with several intermediate steps is known as (a) T.C.A. pathway (b) glycolysis (c) H.M.S. pathway (d) C 4 pathway 136. Which of the following test will you perform to demonstrate the presence of gibberellin? (a) bolting of cabbage (b) differentiation of shoots in tobacco callus culture (c) rapid division in carrot cells (d) elongation of Avena coleoptile 137. The leaves of Mimosa pudica drop down on touch because (a) the plant has nervous system (b) the turgor pressure of the leaf base changes (c) the leaves are very tender (d) the leaf tissues are injured 138. If enterokinase is absent, the digestion of which one of the following dietary components will be impaired? (a) proteins (b) carbohydrates (c) fats (d) minerals 139. Intestinal villi are more numerous and larger in the posterior part of small intestine than in the anterior part because (a) digestion is faster in posterior part (b) blood supply is poor in posterior part (c) there is more digested food in posterior part (d) blood supply is poor in anterior part 132. Largest a m o u n t of phosphate bond energy is produced in the process of respiration during (a) anaerobic respiration (b) glycolysis (c) Krebs cycle (d) photorespiration 140. The combination of haemoglobin oxygen in blood can be promoted by (a) decreasing the oxygen concentration in the blood (b) increasing oxygen concentration in the blood (c) increasing carbon dioxide concentration in blood (d) introducing carbon monoxide into the blood 133. High temperature does not affect the dry seeds as much as they affect germinating seeds because (a) hydration makes the enzyme more sensitive to temperature (b) dry seeds are hard and therefore, are resistant to heat (c) dry seeds have more reserve food (d) the seedlings are tender 141. In which one of the following conditions does the oxygen dissociation curve of haemoglobin shift to the right or normal curve? (a) decrease in pH (b) decrease in C 0 2 concentration (c) decrease in acidity (d) decrease in temperature 134. Which of the following is not true about auxins? (a) it inhibits lateral growth 142. In the heart of man the bicuspid valve is situated between 44 " " B I O L O G Y TODAY | MARCH '07 (a) (b) (c) (d) right ventricle and pulmonary aorta left auricle and left ventricle right auricle and right ventricle postcaval and auricle 143. Parents of blood groups O and AB cannot have a child of group AB because (a) gene O is dominant over gene A (b) gene O is dominant over gene B (c) gene A or B is absent in one of the parents (d) genes A and B are absent in one of the parents 144. The chief function of lymph nodes in mammalian body is to (a) destroy the old and worn-out red blood cells (b) produce white blood cells (c) collect and destroy pathogens (d) produce a hormone 145. If kidney fails to reabsorb water, the effect on tissue would (a) remain unaffected (b) shrink and shrivel (c) take more 0 2 from blood (d) absorb water from blood plasma 146. Fluid within the loop of Henle is most concentrated in the (a) ascending limb (b) descending limb (c) hairpin bend (d) bend between the ascending limb and the distal tubule 147. The lengthening of long bones beyond is produced due to over secretion of a hormone secreted from (a) anterior lobe of pituitary (b) posterior lobe of pituitary (c) pars intermedia of pituitary (d) thymus 148. During contraction and relaxation of striated muscle fibre the length of A-band usually (a) increases (b) remains same and does not change (c) decreases (d) none of these 149. The longitudinal Haversian canals in the bone of mammals are connected to each other by transverse canals, which are known as (a) Volkman's canals (b) inguinal canals (c) Bidder's canals (d) semicircular canal 150. The vagus nerve releases 45" " B I O L O G YTODAY | MARCH '07 (a) (b) (c) (d) adrenaline to slow down the heartbeat noradrenaline to slow down the heartbeat noradrenaline to lengthen each diastole acetylcholine to slow down the heartbeat 151. Receptors of pressure present in deep layers of skin are (a) Krause's end bulb (b) Meissner's corpuscles (c) corpuscles of Ruffini (d) Pacinian corpuscles 152. Which of the following tissues is least likely to be rejected by the body if transplant is performed between two unrelated persons? (a) kidney (b) skin (c) cornea (d) heart 153. Which of the following is not a function of neuron? (a) receive information (b) conduct a signal (c) form the myelin sheath (d) co-ordinate metabolic activities 154. A person going up to 10,000 feet high in a hot balloon may develop severe pain in the ear due to (a) blocked Eustachian tube (b) rupture of fenestra rotunda (c) endolymph getting into semicircular canals (d) fear of great height 155. Surgical removal of pituitary gland will cause, a fall in sodium ions in serum and rise in potassium ion level due to (a) atrophy of adrenal cortex (b) no hormones from pancreas are available (c) atrophy of adrenal medulla (d) none of the above 156. If a pregnant woman having prolonged labour pains, its childbirth has to be hastened. It is advisable to administer a hormone that can (a) activate the smooth muscles (b) increase the metabolic rate (c) release glucose into the blood (d) stimulate the ovary 157. Blood pressure is controlled by (a) adrenal gland (b) thyroid gland (c) thymus (d) corpus luteum 158. Glomerular zone of the adrenal cortex is responsible for controlling (a) carbohydrate metabolism (b) water and electrolyte balance (c) steroid hormone secretion (d) blood pressure 159. Which one of the following pairs correctly matches a hormone with a disease resulting from its deficiency? (a) relaxin-gigantism (b) parathyroid hormone-tetany (c) insulin-diabetes insipidus (d) prolactin-cretinism (c) increased rate of protein synthesis (d) reduced rate of protein synthesis 160. A method in which roots are induced on the stem while it is still attached to the parent plant is called (a) layering (b) cutting (c) grafting (d) vivipary 169. The female children of a haemophiliac man and carrier woman are likely to be (a) all haemophiliac (b) half haemophiliac and half carriers (c) all carriers (d) half normal and half carriers 161. Which part of the reproductive structure produces both enzymes and hormones? (a) archesporium (b) tapetum (c) endothecium (d) middle layers 162. When the ovule is curved and curvature is more pronounced and along with ovule and embryo sac it becomes horeshoe shaped, then such type of ovule is called (a) amphitropous (b) campylotropous (c) anatropous (d) orthotropous 168. "Gametes are never hybrid". It is a statement of law of (a) segregation (b) independent assortment (c) random fertilisation (d) dominance 170. What happended when heat killed S cells were injected along with live R-cells into mice? (a) mice survived and shared live cells (b) mice died and shared live S-cells (c) mice survived and shared live R-cells (d) mice died and shared live R-cells 163. Secondary nucleus formed by the fusion of two polar nuclei is also called (a) definitive nucleus (b) tube nucleus (c) vegetative nucleus (d) generative nucleus 171. Of the following, which sequence is present in Rous sarcoma virus? (a) DNA RNA —> proteins (b) DNA DNA proteins (c) RNA —> DNA —» proteins (d) RNA DNA H> RNA - > proteins 164. Find out correct group of structure, its location and secretion. (a) follicular cells - ovary - progesterone (b) interstitial cells - testes - testosterone (c) oxyntic cells - liver — glucagon (d) alveoli - salivary glands - saliva 172. In 1980, F. Sanger was awarded Nobel Prize second time to be shared by Gilbert for their work on (a) determining amino acid sequence of insulin (b) determining the base sequence of DNA of a virus (c) determining the structure of DNA (d) genetic mapping 165. Menstruation is triggered by an abrupt decline in the amount of (a) luteinising hormone (b) follicle-stimulating hormone (c) estrogen (d) progesterone 173. Which pair of enzymes in necessary to make recombinant DNA? (a) DNA polymerase and ligase (b) restriction enzyme and DNA polymerase (c) DNA polymerase and RNA polymerase (d) ligase and restriction enzyme 166. After a sperm has penetrated an ovum in the process of fertilisation, entry of further sperms is prevented by (a) development of the pigment coat (b) development of the vitelline membrane (c) condensation of yolk (d) formation of fertilisation membrane 174.During the origin and evolution of life, key biological compounds were progressively synthesised in ocean with the help of energy obtainable from (a) lightening (b) ultra violet light (c) lightening as well as ultra violet light (d) combustion of certain compounds 167. With the advancement of age, hair of males starts 175. Animals of cold countries have shorter ears. This is thinning due to (a) Allen's law (b) Cope's law (a) falling of hair ! (c) Bergmann's law (d) Dollo's law (b) low ATP formation 46 " " B I O L O G Y TODAY | MARCH '07 176. Which of the following is used as a component of cough syrup? (a) nicotine (b) morphine (c) codeine (d) resperine 1 7 7 . L S D , m o r p h i n e and b h a n g are r e s p e c t i v e l y obtained from (a) Claviceps, Cannabis and Rauwolfia (b) Cannabis, Claviceps and Fusarium (c) Claviceps, Rauwolfia and Papaver (d) Claviceps, Papaver and Cannabis 178. Hybrid vigour is best maintained in the case of (a) inbreeding species (b) cross pollinated species (c) back crossing (d) vegetatively propagated crop plants 179. A larval stage with the characteristic six spines (hexacanth) is found in the life cycle of (a) Taenia solium (b) Fasciola hepatica and Taenia solium (c) Taenia saginata only, absent in T. solium and Fasciola (d) all the helminthes those are parasitic 180. Antigens are (a) the micro-organism that are the source of disease in the body (b) a foreign body which is harmful to the animal, and the generation of antibodies (c) the chemicals produced by the invading microbes that destroy and damage the body cells (d) the substances generated in the body in response to the infection 181. Surgical removal of thymus of a newborn shall result in failure to produce (a) monocytes (b) B-lymphocytes (c) T-lymphocytes (d) basophils 182. Lysis of foreign cells is mediated through (a) IgM only (b) IgA only (c) IgM and IgG (d) IgD and IgE 183. What is the first step in Southern blot technique? (a) digestion of DNA by restriction endonuclease (b) denaturation of D N A on gel for hybridisation with specific probe (c) production of a group of genetically identical cells (d) isolation of DNA from a nucleated cell such as the one from the scene of crime 1 8 4 . S c i e n t i s t s p i n p o i n t e d t h e l o c a t i o n of c o l o u r processing centres in human visual cortex by means of " ' B I O L O G Y TODAY | MARCH 07 (a) (c) N M R imaging PET scanning (b) CT scanning (d) Ultra-sound imaging 185. Cancer cells are more easily damaged by radiation than norma! cells because they are (a) non-dividing (b) starved of mutation (c) undergoing rapid division (d) different in structure 186. Transgenic animal has (a) foreign DNA in all its cells (b) foreign RNA in all its cells (c) foreign DNA in some of the cells (d) both (b) and (c) 187. Mycorrhiza is used in (a) synthesis of food (b) increasing soil fertility (c) providing resistance against different regulators (d) obtaining nutrients from soil 188. A branch of science that deals with the study of origin of the soil, its classification and its description is known as (a) pedology (b) geology (c) edaphology (d) ecology 189. In which one of the following pairs is the specific characteristic of a soil not correctly matched? (a) black soil - rich in calcium carbonate (b) laterite - contains aluminium compound (c) terra rossa - most suitable for roses (d) chernozems - richest soil in the world 190. Which type of association is f o u n d in between entomophilous flower and pollinating agent? (a) mutualism (b) commensalism (c) co-operation (d) co-evolution 191. If the d e c o m p o s e r s b e c o m e e x t i n c t , t h e m o s t severely affected would be (a) non-cycling of minerals (b) damage to nitrogen fixation (c) biomagnification (d) carnivores will be starved 192. Laterization is a slow and continuous process that occurs due to weathering of rocks. This is (a) a mechanical process (b) a chemical process (c) biological process (d) mechanical as well as chemical process 193. What is social forestry? 47 (a) growing and management of useful plants on common lands (b) management of forests by co-operative societies (c) growing one type of trees (d) growing different types of plants together 194. Five major types of biomes found in India are (a) tundra, taiga, evergreen temperate, deciduous temperate, tropical (b) tundra, taiga, evergreen temperate, evergreen tropical, deciduous tropical (c) alpine tundra, boreal, temperate, tropical evergreen, grasslands (d) t r o p i c a l , m o n t a n e t e m p e r a t e , alpine t u n d r a , grasslands and deserts 195. Which endangered animal is the source of the world's finest, lightest, warmest and most expensive wool-the shahtoosh? (a) nilgai (b) cheetal (c) kashmiri goat (d) chiru 196.Eutrophication leads to death of fish due to (a) increased 0 2 content (b) increased algae content (c) decreased algae content(d) decreased 0 2 content 197. Which of the following gases produces ozone "holes" in the stratosphere? (a) benzopyrene (b) hydrocarbons (c) chlorofluorocarbons (d) UV radiation 198. What minerals are found in the run-off from agricultural land and treated and untreated sewage effluents, which are highly responsible for eutrophication of water bodies? (a) phosphorous and carbon (b) nitrogen and phosphorous (c) potassium and arsenic (d) iron and manganese 199. A poisonous substance is produced in the spores of a fungus (Aspergillus flavus) that grows naturally on peanuts and grains. If ingested it can damage the immune system, cause liver cancer and is also mutagenic inducing chromosomal damage in a wide range of animals. Name this toxin. (a) aflatoxin (b) botulinum toxin (c) dioxin (d) all of these 200. Two geographical regions separated by high mountains are (a) oriental and australian (b) nearctic and palaearctic (c) palaearctic and oriental (d) 48 neotropical and ethiopian ForAns. see page no.50 Contd. from page no. 35 (b) Finance Commission (c) Planning Commission (d) Union Public Service Commission. 22. The right to vote in elections to a Parliament is a (a) fundamental right (b) constitutional right (c) legal right (d) natural right. 23. The largest island in the world is Greenland. It is an integral part of (a) Norway (b) North America (c) Denmark (d) Canada. 24. The term 'Beamer' is associated with (a) football (b) hockey (c) cricket (d) chess. 25. The World Trade Organisation (WTO) was earlier known as (a) GATT (b) UNICEF (c) UNCTAD (d) FAO. 26. Which of the following is a famous book written by Mr. Orhan Pamuk, the recipient of Nobel Prize in Literature for 2006? (a) The grass is singing (b) Tin drum (c) My name is red (d) Eyeless in gaza. 27. Which of the following cities is popularly known as 'The Windy City'? (a) Lhasa (b) Venice (c) Chicago (d) Seoul. 28. Polly Umrigar, who died in November 2006, was a legendary (a) marathi actor (b) sitar player (c) cricketer (d) orthopaedist. 29. Who among the following has been named the International Tennis Federation's World Champion for 2006? (a) Marat Safin (b) Roger Federer (c) James Blake (d) Fernando Gonzalez. 30. Alum stops bleeding in minor cuts because of (a) solvation (b) emulsion (c) dialysis (d) coagulation. ANSWERS 1. 6. 11. 16. 21. 26. (b) (d) (c) (c) (c) (c) 2. 7. 12. 17. 22. 27. (c) (b) (c) (a) (a) (c) 3. 8. 13. 18. 23. 28. (c) (c) (c) (d) (c) (c) 4. 9. 14. 19. 24. 29. (b) (a) (b) (a) (c) (b) 5. 10. 15. 20. 25. 30. (a) (b) (d) (c) (a) (d) • • ""BIOLOGY TODAY | MARCH '07 MCQ'S IN H u m a n Blatogy Must for AIIMS, CBSE, BHU, AFMC, Manipal, UP-CPMT & other PMT's 1. An action potential in the motor end plate rapidly spreads to the central portions of a muscle cells by means of the (a) transverse tubules (b) sarcoplasmic reticulum (c) H zone (d) Z lines 2. The aortic valve (a) prevents the backflow of blood into the aorta during ventricular diastole (b) prevents the backflow of blood into the left ventricle during ventricular diastole (c) prevents the backflow of blood into the left ventricle during ventricular ejection (d) closes when the first heart sound is heard 3. Which of the following steps should a person take first in administering first aid to a person whose forearm is bleeding from a deep, two inch long cut? (a) apply an antiseptic to the wound to prevent infection (b) apply pressure to the wound using a protective barrier (c) press on a pressure point to slow blood flow through the artery (d) raise the arm over the person's head A patient is generally advised to specially consume more meat, lentils, milk & eggs in diet only when he suffers from (a) scurvy (b) rickets (c) kwashiorkar (d) anaemia The spleen performs all of the following functions except (a) maturation of T cells (b) destruction of infectious organisms (c) disposal of old or deformed blood cells (d) production of haematopoietic stem cells Vitamin K is required for synthesis of each of the following coagulation factors except for factor (a) H (b) V (c) VII (d) X In what ways does the interior surface of the membrane of a resting neuron differ f r o m the external surface? (a) negatively charged and contains less sodium (b) positively charged and contains less sodium (c) negatively charged and contains more sodium (d) positively charged and contains more sodium An increase in altitude causes a decrease in gas exchange efficiency because For more these type of questions read Human Biology Wl-fcG- Human Biology 700 + MCQ's from AIIMS, CBSE-PMT, AFMC, BHU, VMMC, Manipal & other National I State PMT's 2000 + High Yield Fact's 400 + Points to remember Available at all leading bookshops all over the country 49" " B I O L O G YTODAY | MARCH '07 Rs. 150 (a) less blood circulates through the lungs (b) there is a decrease in oxygen pressure, therefore less of a g r a d i e n t into the lungs during inspiration (c) the surface area of the alveoli decrease (d) there are fewer red blood cells in the blood at high altitudes 9. An example of the phase of the control of gastric function occurs when a person's stomach "growls" after he sees and smells a meal cooking, (a) cephalic (b) gastric (c) intestinal (d) interdigestive 10 An increase in N a reabsorption in the distal convoluted tubules is due to (a) an increase in the production of aldosterone (b) an increase in the production of ADH (c) an increase in osmolarity of the blood plasma (d) all of the above 11. One primary oocyte will give only one mature ovum after going through all phases of gametogenesis whereas the number of spermatozoa resulting from one spermatocyte is (a) 1 (b) 2 (c) 3 (d) 4 12. What kind of cells wander the interstitial fluid eating whatever bacteria and virus-infected cells they encounter and recognize? (a) neutrophils (b) monocytes (c) leucocytes (d) macrophages 13 Which statement below best characterizes the endosteum of bony tissue? (a) it is a layer of o s t e o c y t e s b e t w e e n the periosteum and cortical bone (b) it is a layer of o s t e o b l a s t s b e t w e e n t h e periosteum and cortical bone (c) it is a layer of osteocytes between the marrow cavity and the inner shell of bone that lines the marrow cavity (d) it is a layer of osteoblasts between the marrow cavity and the inner shell of bone that lines the marrow cavity 14. Which epidermal layer given below contains cells that show 3 H-thymidine incorporation? (a) stratum corneum (b) stratum lucidum (c) stratum basale (d) stratum spinosum 15. Each of the following statements concerning corneal layers is true except (a) the epithelium is stratified squamous (b) the endothelium has a basement membrane (c) the stroma is acellular (d) the stroma contains collagen 50 ANSWERS 1. 6. It. (a) (b) (d) 2. 7. 12. 3. 8. 13. (b) (a) (d) (b) (b) (d) 4. 9. 14. (c) (a) (c) 5. (a) 10. (a) 15. (c) • 4. 9. 14. 19. 24. 29. 34. 39. 44. 49. 54. 59. 64. 69. 74. 79. 84. 89. 94. 99. 104. 109. 114. 119. 124. 129. 134. 139. 144. 149. 154. 159. 164. 169. 174. 179. 184. 189. 194. 199. (b) (c) (c) (C) (b) (b) (d) (b) (d) (d) (b) (c) (b) (d) (d) (a) (b) (a) (c) (b) (c) (c) (c) (a) (d) (d) (d) (c) (c) (a) (a) (b) (b) (b) (c) (a) (c) (c) (d) (a) 5. (a) 10. (b) 15. (a) 20. (b) 25. (c) 30. (c) 35. (b) 40. (a) 45. (a) 50. (b) 55. (b) 60. (c) 65. (b) 70. (c) 75. (b) 80. (c) 85. (c) 90. (d) 95. (b) 100. (b) 105. (c) 110. (c) 115. (a) 120. (d) 125..(c) 130. (c) 135. (c) 140. (b) 145. (b) 150. (d) 155. (a) 160. (a) 165. (d) 170. (b) 175. (a) 180. (b) 185. (c) 190. (a) 195. (d) 200. (c) Contd. from page no. 48 1. 6. 11. 16. 21. 26. 31. 36. 41. 46. 51. 56. 61. 66. 71. 76. 81. 86. 91. 96. 101. 106. 111. 116. 121. 126. 131. 136. 141. 146. 151. 156. 161. 166. 171. 176. 181. 186. 191. 196. (b> (a) (d) (a) (d) (a) (a) (b) (b) (b) (a) (c) (b) (c) (c) (d) (b) (d) (b) (c) (b) (d) (b) (b) (a) (c) (b) (a) (a) (c) (d) (a) (b) (d) (d) (c) (c) (a) (a) (d) 2. 7. 12. 17. 22. 27. 32. 37. 42. 47. 52. 57. 62. 67. 72. 77. 82. 87. 92. 97. 102. 107. 112. 117. 122. 127. 132. 137. 142. 147. 152. 157. 162. 167. 172. 177 182. 187. 192. 197. (a) (a) (b) (d) (c) (a) (a) (a) (a) (c) (d) (c) (c) (b) (a) (c) (b) (a) (d) (b) (d) (b) (c) (c) (b) (c) (c) (b) (b) (a) (c) (a) (b) (d) (b) (d) (c) (d) 5' (c) both (a) and (b) (d) any. 49. Which of the following is correct order of the evolutionary history of man ? (a) peking man, Homo sapiens, neanderthal man, cromagnon man (b) peking man, heidelberg man, neanderthal man, cromagnon man (c) peking man, heidelberg man, neanderthal man, cromagnon man (d) peking man, neanderthal man, Homo sapiens, heidelberg man. 50. 1st life on earth was (a) cyanobacteria (c) autotrophs (b) chemoheterotrophs (d) photoautotrophs. Bundle of His is a network of muscle fibres distributed throughout the heart walls muscle fibres found only in the ventricle wall nerve fibres distributed in ventricles nerve fibres found throughout the heart 56. In a random mating population in equilibrium, which one of the following brings about a change in gene frequency in a non-directional manner ? (a) mutations (b) random drift (c) selection (d) migration 57. Two crosses between the same pair of genotypes or phenotypes in which the sources of the gametes are reversed in one cross is known as (a) test cross (b) reciprocal cross (c) dihybrid cross (d) reverse cross 58. they (a) (b) (c) (d) When a cluster of genes show linkage behaviour, do not show a chromosome map show recombination during meiosis do not show independent assortment induce cell division 59. During transcription, the DNA site at which RNA polymerase binds is called (a) promotor (b) regulator (c) receptor (d) enhancer 51. During generation, modification of an organ to other organ is known as (a) morphogenesis (b) epimorphosis (c) morphollaxis (d) accretionary growth. 60. (a) (b) (c) (d) 52. Darwins theory of pangenesis shows similarity with theory of inheritance of acquired characters then what shall be correct according to it ? (a) useful organs becomes strong and developed while useless organs become extinct (b) size of organs increase with ageing 61. In sugarcane plant 1 4 C0 2 is fixed in malic acid, in which the enzyme that fixes C 0 2 is (a) ribulose biphosphate carboxylase (b) phosphoenol pyruvic acid carboxylase (c) ribulose phosphate kinase (d) fructose phosphatase 56 Stomata of CAM plants are always open open during the day and close at night open during the night and close during the day never open " " B I O L O G Y TODAY | MARCH '07 62. (a) (b) (c) (d) The apical meristem of the root is present only in radicals only in tap roots only in adventitious roots in all the roots 63. In which kingdom would you classify the archaea and nitrogen-fixing organisms, if the five-kingdom system of classification is used ? (a) plantae (b) fungi (c) protista (d) monera 64. (a) (b) (c) (d) Phenetic classification is based on the ancestral lineage of existing organisms observable characteristics of existing organisms dendrograms based on DNA characteristics sexual characteristics 65. (a) (b) (c) (d) The silkworm silk is the product of cuticle of the larva salivary gland of the larva cuticle of the adult salivary gland of the adult 66. Which of the following is the false statement about "antibiotics" ? (a) this term was given by Waksman in 1942 (b) some persons have allergy from antibiotics (c) antibiotics is produced by microorganisms (d) antibiotics are capable of curing all the disease 67. Demineralization of bones is caused by the oversecretion of (a) prolactin (b) epinephrine (c) thyroxine (d) parathormone 68. first (a) (c) The polytene chromosomes were discovered for the time in Drosophila (b) Musca nebulo Chironomus (d) Musca domestica 69. Irr w h i c h of t h e f o l l o w i n g g r o u p s all are polysaccharides? (a) glycogen, sucrose and maltose (b) sucrose, glucose and fructose (c) glycogen, cellulose and starch (d) maltose, lactose and fructose 70. What are the mostly diversed molecules in the cell? (a) lipids (b) carbohydrates (c) proteins (d) mineral salts 71. (a) (b) (c) (d) Thigmotropic movement is best shown by movement in roots movement in tendril insectivorous plants movement in Mimosa pudica 57" " B I O L O G YTODAY | MARCH '07 72. Photorespiration is the characteristic of (a) C 3 -plants (b) CAM plants (c) C 4 -plants (d) all of these 73. Cork cambium and vascular cambium are the examples of (a) apical meristem (b) lateral meristem (c) wound tissue (d) intercalary meristem 74. The citric acid is produced by (a) Aspergillus niger (b) Candida utilis (c) Streptococcus lactis (d) none of these 75. The organism, used for alcohol fermentation, is (a) Pseudomonas (b) Aspergillus (c) Penicillium (d) Saccharomyces 76. What are sex organs provided in some bacteria? (a) plasmid (b) sex pili (c) gametes (d) circular DNA 77. The function of rough endoplasmic reticulum is synthesis of (a) fat (b) protein (c) lipid (d) steroid 78. Human immunodeficiency virus (HIV) has a protein coat and a genetic material which is (a) single stranded DNA (b) double stranded RNA (c) single stranded RNA (d) double stranded DNA 79. The technique of growing plants in water culture is called (a) lkebana (b) tissue culture (c) hydroponics (d) cell culture 80. The total gain of A.T.P. from the breakdown of one molecule of glucose through aerobic respiration is (a) 30 (b) 38 (c) 36 (d) 40 81. Ozone depletion in stratosphere would result in (a) forest fires (b) skin cancer incidence (c) global warming (d) none of these 82. Which pigment is essential for nitrogen fixation by leguminous plants? (a) anthocyanin (b) phycoerythrin (c) phycocyanin (d) leghaemoglobin 83. (a) (c) (d) Synecology is the study of ecosystem (b) population of species single species only communities of species and genera 84. In plant tissue culture, which of the following shows totipotency? (a) xylem vessel (b) sieve tube (c) meristem (d) collenchyma 58 85. The primary photosynthesis is (a) production of (b) production of (c) absorption of 86. (a) (b) (c) (d) f u n c t i o n of the light reaction of ATP ATP + NADPH-, light (d) manufacture of food. Monera includes actinomycetes only cyanobacteria only actinomycetes and cyanobacteria none of the above. 87. When there is a bunch of flagella on one side, the bacteria are known as (a) lophotrichous (b) amphitrichous (c) peritrichous (d) none of these. 88. (a) (b) (c) (d) The area cribrosa occurs at base of medullary pyramid tip of medullary pyramid the major calyx the pelvis. 89. U n d e r t h e wild l i f e p r o t e c t i o n Act of t h e Government of India, the Indian elephant is in the category of (a) protected species (b) endangered species (c) vulnerable species (d) rare species. 90. By weight the most abundant element in a cell is (a) carbon (b) hydrogen (c) oxygen (d) sodium. 91. Which one of the following forms of RNAs is involved in receiving the message of genetic code from DNA for translation during protein synthesis? (a) rRNA (b) mRNA (c) tRNA (d) all of these. 92. A species with several subspecies is called a (a) polytypic species (b) polytopic species (c) super species (d) monotypic species. 93. (a) (b) (c) (d) The disorders of AIDS decrease in the number decrease in the number decrease in the number increase in the number is characterized by of killer T-cells of suppressor T-cells of helper T-cells of helper T-cells. 94. One method of biotechnology for animal breeding programmes to improve yield of milk/meat/wool in catties, goat, sheep, is to incorporate new/foreign genes into the genome of their fertilized eggs to produce (a) hybrids (b) F, generation (c) transgenic individuals (d) F 2 generation. 95. (a) (b) (c) (d) Biosphere consists of basic units known as biomes regional ecosystem patterns ecosystems geographical patterns. 96. Magnification of a compound microscope does not depend upon (a) numerical aperture (b) focal length of eye-piece (c) focal length of objective (d) tube length of microscope. 97. In which of the following units the sedimentation coefficient of a subcellular particle is expressed ? (a) Dalton (b) Newton (c) Svedberg (d) Decibel. 98. (a) (b) (c) (d) Bacterial cells can be stained with safranin crystal violet mercuric chloride crystal violet and iodine. 99. Ultrasound imaging is also known as (a) EEG (b) ECG (c) echography (d) MRI. 100. Most commonly used contrast X-ray techniques are (a) angiography (b) urography (c) both of these (d) none of these. ANSWERS 1. 6. 11. 16. 21. 26. 31. 36. 41. 46. 51. 56. 61. 66. 71. 76. 81. 86. 91. 96. (c) (b) (d) (b) (a) (c) (d) (c) (a) (a) (b) (b) (b) (d) (b) (b) (b) (c) (b) (a) 2. 7. 12. 17. 22. 27. 32. 37. 42. 47. 52. 57. 62. 67. 72. 77. 82. 87. 92. 97. (b) (c) (b) (b) (d) (a) (c) (b) (b) (b) (d) (b) (d) (d) (a) (b) (d) (a) (a) (c) 3. 8. 13. 18. 23. 28. 33. 38. 43. 48. 53. 58. 63. 68. 73. 78. 83. 88. 93. 98. (b) (c) (c) (b) (b) (c) (b) (b) (d) (a) (b) (c) (d) (c) (b) (c) (d) (c) (c) (d) 4. 9. 14. 19. 24. 29. 34. 39. 44. 49. 54. 59. 64. 69. 74. 79. 84. 89. 94. 99. (b) (b) (a) (b) (b) (b) (c) (b) (a) (c) (c) (a) (b) (c) (a) (c) (c) (a) (c) (c) 5. 10. 15. 20. 25. 30. 35. 40. 45. 50. 55. 60. 65. 70. 75. 80. 85. 90. 95. 100. • (a) (d) (c) (c) (c) (d) (c) (d) (d) (b) (b) (c) (b) (c) (d) (b) (b) (c) (a) •(c)• " " B I O L O G Y TODAY | MARCH '0 Column I (Scientists) Column II (Discoveries) (a) Strasburger (i) (b) Leeuwenhoek (ii) (c) Robert Hooke (iii) (d) Swanson (e) Fontana (iv) (v) (vi) (vii) (viii) (ix) (x) Discovered nucleolus Coined the term cytoplasm and nucleoplasm Publication of micrographia Observed hundreds of small polygonal chambers in thin sections of dead cork Described bacteria (1676) and gave the term animalcules First observed nucleus in RBC of Salmon fish Laid the foundations for the science of bacteriology and microbiology Father of modern cytology Described cell as basic unit Father of microscopy. 8. Refer the figure and answer the question on the basis of the given functions (i and ii). (i) Sound transmission (ii) Linear acceleration Some structures marked as V, W, X, Y and Z are associated with the above functions. Select the given statements from (I), (II), (III) and (IV) for the structure V, W, X, Y and Z. (I) If (II) If (III) If (IV) If 9. 28 the the the the item item item item is is is is associated associated associated associated with with with with (i) (ii) both (i) and (ii) neither (i) nor (ii) (a) Fill in the blanks. The B cells produce specialised glycoproteins called which have 3 main functions : of particulate matter, of bacteria to facilitate their subsequent phagocytosis of cells and of toxins is the most abundant antibody. (b) Label the given diagram. ®ir Xsfc(-aii (b) D e n a bank (d) Vijaya bank. I<2>| <•> I II III IV Each of the six faces of a cube is numbered by one of the six digits from I to 6. This cube is shown in its four different positions in the figures I, II, III and IV. Consider the following statements : 1. Figures II and III are sufficient to know as to which face is opposite to the face numbered 6. 2. Figures II and III are sufficient to know as to which face is opposite to the face numbered 4. 3. Figures I and IV are sufficient to know as to which face is opposite to the face numbered 3. 45 Which of the statements given above are correct? (a) 1 and 3 only (b) 1 and 2 only (c) 2 and 3 only (d) 1, 2 and 3. 57. Consider the following statements (1) caffeine, a constituent of tea and coffee is a diuretic (2) citric acid is used in soft drinks (3) ascorbic acid is essential for the formation of bones and teeth (4) citric acid is a good substitution for ascorbic acid in our nutrition. Which of the statements given above are correct ? (a) 1 & 2 only (b) 1, 2 & 3 only (c) 3 & 4 only (d) all the four statements. Directions (Q. 58 to Q.60) : Select the related letters/ •word/number/figure from the given alternatives. 58. Peace : Chaos : : Creation : ? (a) build (b) construction (c) destruction (d) manufacture. 59. ACFJ : ZXUQ : : EG IN : ? (a) VUSQ (b) VTRP (c) VRPM 60. (d) VTQM. o o • (a) (b) 63. Which one of the following departments was created by Allauddin Khilji to improve the functioning of the State Revenues? (a) Diwan-i Mustakharaj (b) Diwan-i Kohi (c) Diwan-i Arz (d) Diwan-i Insha. 64. Which among the following diseases is tested by a test known as 'ELISA'? (b) T.B. (a) AIDS cancer (d) polio. (c) 65. The amount of calories in one litre of water is (b) 1 calorie (a) 100 calories (d) no calorie. (c) 1000 calories 66. (31% of 260) x ? = 12896 (a) 150 (b) 140 (c) 160 (d) 180. Directions (Q. 67 to Q.68) : In each of the following number series one of the given number is wrong. Find out the wrong number. 67. 439 778 1456 2812 5624 10948 (a) 5624 (b) 1456 (c) 778 (d) 2812. 68. 156 468 780 1094 1404 1716 (a) 468 (b) 1094 (c) 1717 (d) 780. Directions (Q. 69 to Q.73) : Choose the word opposite in meaning to the underlined word. (c) (d) 61. Six book PQRSTU are placed side by side. RQT have blue covers and other books have red covers. Only S and U are new books and the rest are old. PRS are law reports and the rest are Gazetteers. Which two books are old Gazetteers with blue cover? (a) Q and R (b) Q and T (c) Q and U (d) T and U. 62. A square paper is folded in a particular manner and a punch is made. When unfolded, the paper appears as given b e l o w - Find out the manner in which the paper is folded and punch is made from the responses given. 69. Nebulous (a) starry (c) porous (b) clear (d) fundamental. 70. Obsession (a) whim (c) indifference (b) addiction (d) delusion. 71. Corroborate (a) establish (c) confirm (b) substantiate (d) contradict. 72. Exhuberant (a) apathetic (c) fervent (b) admiring (d) enchanting. 73. Ingenious (a) unfamiliar (b) inconvenient (d) innovative. (c) unimaginative Directions (Q. 74 to Q.75) : Fill in the blanks the most appropriate word/words. with 74. The child was so spoiled by his parents that he pouted and became when he did not receive all their 46 ""BIOLOGY TODAY | APRIL 07,63 attention. (a) discreet (c) sullen (b) suspicious (d) tranquil. 75. We were amazed that a man who had been till now the most of public speakers could, in a single speech, electrify an audience and bring them cheering to their feet. (a) enthralling (b) accomplished (c) prosaic (d) masterful. vegetarianism, (a)/ who revived and reorganised the Jain doctrine (b)/ and established rules f o r their monastic order, (c)/ No error (d) 85. Microwaves are the principle carriers (a)/ of television, t e l e p h o n e and data t r a n s m i s s i o n s (b)/ between stations on earth and between the earth and satellites, (c)/ No error (d) 76. St. George's is the capital of (a) H o n d u r a s (b) Grenada (c) Kiribati (d) Malawi. 86. Introducing Kamla, Mahesh said, "Her father is the only son of my father". How was Mahesh related to Kamla ? (a) brother (b) father (c) uncle (d) son. 77. Which among the following scientists is the first recipient of the India Science Award? (a) C.N.R. Rao (b) R.S. Paroda (c) J. Swaminathan (d) R. Kasturirangan. 87. In a certain c o d e ' D I V I S I O N ' is w r i t t e n as 'DVISIOIN'. How is 'STATES' written in that code ? (a) SATETS (b) STAETS (c) STATTES (d) SAETTS. 78. T h e C o u n c i l of M i n i s t e r s is c o l l e c t i v e l y responsible to (a) the President of India (b) the Parliament (c) the Prime Minister (d) the Rajya Sabha. 88. B is to south west of A, C is to the east of B and south east of A and D is to north of C in line with BA. In which direction of A is D located ? (a) north (b) east (c) south east (d) north east. 79. (a) (b) (c) (d) Ecosounding is the technique applied to measure the depth of the sea measure the amplitude of the sound waves record earthquake waves record the density of air in the atmosphere. 80. Which state in India is the major producer of antimony? (a) Punjab (b) Bihar (c) Orissa (d) Tamil Nadu. Directions (Q. 81 to Q.85) : In each of the following question each sentence has three parts, indicated by (a), (b) and (c). Read each sentence to find out whether there is an error. If you find an error in any one of the parts (a), (b) and (c), indicate that part as your answer. If a sentence has no error, indicate this by the letter (d), which stands for "No error". 81. The Prime Minister's good looks won him (a)/ the election but he has still to prove (b)/ that he's not a just pretty face, (c)/ No error (d) 82. The two books are the same (a)/ except for the fact that this (b)/ has an answer in the back, (c)/ No error (d) 83. He e s t i m a t e d h i s i n c o m e t a x bill (a)/ by extrapolation over figures (b)/ submitted in previous years, (c)/ No error (d) 84. Mahavira was an advocate of non-violence and ""BIOLOGY TODAY | APRIL 07 , Directions (Q. 89 to Q.90) : In these questions, the first and the last sentences of the passage are numbered (I) and (6). The rest of the passage is split into four parts and named P, Q, R and S. These four parts are not given in their proper order. Read the sentence and find out which of the four combinations is correct. Then choose the correct answer. 89. 1. The tiny bacterial plants that live in the soil help to prepare food for the plants we cultivate. P. The farmer works very hard to make the soil favourable. Q. But these soil bacteria are very necessary and helpful. R. There are millions of bacteria in a cubic inch of fertile soil. 5. Some kinds of bacteria are harmful. 6. They do not need sunlight as do most plants, (a) SQPR (b) QSPR (c) RPSQ (d) PRQS. 90. 1. P. Q. R. S. My uncle Martin went to live in a hamlet. But it was a very lazy parrot. So Martin bought a parrot. Martin's neighbour told him that he must buy a parrot. Every home there had a parrot as a custom. 47 truth. 6. The parrot did not like to speak, (a) RSQP (b) SRPQ (c) PQSR (d) QPSR. 96 Directions (Q. 91 to Q.92) : In each of the following questions arrange the given words in a meaningful sequence and then choose the most appropriate sequence from amongst the alternatives provided below each question. 91. (1) birth (3) funeral (5) education (a) 4 . 5 . 3 , 1 , 2 (c) 1 . 5 . 4 , 2 , 3 (2) death (4) marriage 92. (1) site (3) rent (5) building (a) 4, 1 , 2 , 5 , 3 (c) 2 , 3 , 5 , 1 , 4 (2) plan (4) money (b) 2, 3, 4, 5, 1 (d) 1 , 3 , 4 , 5 , 2 . (b) 3, 4, 2, 5, 1 (d) 1 , 2 , 3 , 5 , 4 . Directions (Q. 93 to Q.95) Choose synonym the given words from each set. 93. GROUSE (a) brave (c) lazy (b) complain (d) tired. 94. ADHERE (a) believe (c) withdraw (b) disbelieve (d) renounce. 95. ACUMEN (a) b l u n t n e s s (c) dullness from (b) cleverness (d) drive. Directions (Q. 96 to Q. 100) : Read the following passage carefully and answer the questions given below. Certain words/phrases in the passages are given in bold to locate them while answering some of the questions. The world of today has achieved much, but for all its declared love f o r h u m a n i t y it has based itself far more on hatred and violence than on the virtues that make man human. War is the negation of truth and humanity. War may be unavoidable sometimes but its progeny are terrible to contemplate. Not mere killing, for man must die, but the deliberate and persistent propagation of hatred and falsehood, which gradually become the normal habits of the people. It is dangerous and harmful to be guided in our l i f e ' s course by hatreds and aversions, for they are wasteful of energy and limit and twist the mind, and prevent if from perceiving the 48 Hatred and aversions are unwholesome as they are (b) d a n g e r o u s (a) narrow (c) harmful (d) barriers in seeing the truth. 97. Man should be guided by (a) scientific discoveries (b) generous human feelings (d) materialism. (c) practical wisdom 98. According to the author the world's declared love of humanity is (a) false (b) non-existent (c) true (d) not to be taken seriously. 99. War is the negation of truth means (a) wars do not exist (b) wars kill human beings (c) wars are evil (d) wars spread and advertise falsehood. 100.According to the author the achievements of the world are not impressive because (a) there is nothing much to boast of (b) its love of humanity is a pretence (c) they are mostly in the field of violence (d) the world hasn't made any achievement. ANSWERS 1. 6. 11. 16. 21. 26. 31. 36. 41. 46. 51. 56. 61. 66. 71. 76. 81. 86. 91. 96. (c) (a) (c) (c) (a) (c) (c) (C) (b) (d) (a) (d) (b) (c) (d) (b) (c) (b) (c) (d) 2. 7. 12. 17. 22. 27. 32. 37. 42. 47. 52. 57. 62. 67. 72. 77. 82. 87. 92. 97. (b) (a) (b) (c) (a) (b) (b) (b) (a) (b) (d) (a) (a) (a) (a) (a) (c) (a) (a) (b) 3. 8.' 13. 18. 23. 28. 33. 38. 43. 48. 53. 58. 63. 68. 73. 78. 83. 88. 93. 98. (b) (a) (b) (a) (c) (b) (b) (c) (d) (a) (c) (c) (a) (b) (c) (b) (c) (d) (b) (d) 4. 9. 14. 19. 24. 29. 34. 39. 44. 49. 54. 59. 64. 69. 74. 79. 84. 89. 94. 99. (b) (b) (b) (a) (b) (b) (c) (c) (c) (a) (d) (d) (a) (b) (c) (b) (c) (d) (a) (d) 5. 10. 15. 20. 25. 30. 35. 40. 45. 50. 55. 60. 65. 70. 75. 80. 85. 90. 95. 100. (a) (a) (c) (d) (c) (b) (d) (c) (d) (d) (c) (d) (d) (c) (c) (d) (a) (a) (b) (b) ""BIOLOGY TODAY | APRIL 07,63 V'/ E N G L I S H , INTELLIGENCE & LOGICAL R E A S O N I N G For : AIIMS, AFMC, UGET Manipal I 7. ENGLISH Directions (Q. 1 to Q . 5 ) : In these questions, sentences are given with blanks to be filled in with an appropriate word(s). Four alternatives a, b, c and d are suggested for each question. Choose the correct alternative out of the four. 1. The meeting is have not arrived. (a) put in because the funds (b) put off (d) put out (c) put away 2. As he proved inefficient the company. (a) rejected him. (b) ejected (c) evicted (d) expelled 3. Most people are influenced by advertisements and tend to believe the claims made about the product, (a) colourful (b) aggressive (c) efficient (d) vigorous 4. The cost of city. (a) being (c) surviving is rising rapidly in this (b) existing (d) living 5. Children enjoy (a) to see (c) to look at the TV programmes. (b) to watch (d) watching Directions (Q. 6 to Q.10): In the paragraph given below certain blanks have been numbered which correspond to question numbers 6 to 10. Choose from the given choices that word that should come in the place of the blank. In both his domestic and ...6... demeanour he was admirably ...7... and orderly, and in all things courteous and civil beyond any other. In food and ...8... he was most temperate, both in partaking of them at the ...9... hours and in not passing the limits of ...10... . 6. (a) open (c) private (b) (d) "TBIOLOGY TODAY I APRIL 07 public government and other competitive exams. (a) behaved (c) composed (b) elderly (d) proposed 8. (a) eating (c) drink (b) rest (d) sleep 9. (a) appointed (c) random (b) choosen (d) disorderly 10. (a) decency (c) necessity (b) privacy (d) speed Directions (Q. 11 to Q . 1 3 ) : Four alternatives are given for the idiom/phrase underlined in the sentence. Choose the alternative which best expresses the meaning of the idiom/phrase. 11. To die in harness means to die while (a) riding a horse (b) in a stable (c) in a uniform (d) still in service 12. To keep under wraps means to keep something (a) covered (b) protected (c) unpacked (d) secret 13. After independence Indian agriculture rose like a phoenix due to the Green Revolution. (a) with a new life (b) with a start (c) with royal gait (d) with vengeance Directions (Q. 14 to Q . 1 5 ) : A sentence has been given in Active/Passive voice. Out of the four alternatives suggested, select the one which best expresses the same sentence in Passive/Active voice. 14. (a) (b) (c) (d) We waste much time on trifles. much time was wasted on trifles. much time will be wasted on trifles. much time is wasted by us on trifles. much time is wasted on trifles. 15. (a) (b) (c) (d) Mohan gave the beggar an old shirt. an old shirt was given to Mohan by the beggar. an old shirt was given to the beggar by Mohan. the beggar was gave an old shirt by Mohan. an old shirt was gave to the beggar by Mohan. 49 Directions (Q. 16 to Q. 17): Out of thefour alternatives, choose the one which best expresses the meaning of the given word. 16. SUPERANNUATED (a) experienced (b) accepted (c) retired (d) senile 17. TRANSITION (a) position (c) change Dorsal peripheral inactive (b) central (d) ventral Sagacious foolish casual (b) false (d) cunning INTELLIGENCE & LOGICAL REASONING (b) translation (d) movement Directions (Q. 18 to Q.20) : In each question below, some words are given, one of which may be wrongly spelt. Find out that word where the spelling is wrong. If all the words are spelt correctly. 18. (a) pilgrimage (b) enormous (c) temparament (d) spontaneous 19. (a) exaggeration (b) expectation (c) explaination (d) extermination 20. (a) truce (c) cruise 24. (a) (c) 25. (a) (c) (b) bruise (d) deduse Directions (Q. 21 to Q . 2 2 ) : It is provided with the first and last parts of a sentence. The remaining sentence is broken into four parts labelled P, Q, R and S. It is required to arrange these parts so as to form a complete meaningful sentence. 21. P, Q. R. 5. 6. (a) (c) 1. The man whom I hit on the head Says that when he meets me On my way back home from school On the road He will beat me Till I .cry for mercy. RPSQ (b) RQSP PSRQ (d) QPRS 22. P. Q. R. 5. 6. (a) 1. It was obvious Made by him Submitted at the meeting From the comments On the draft proposals That he was not satisfied with them RPSQ (b) SQRP (c) PSRQ (d) QRSP 26. I was born on August 11. Mohan is younger to me by 11 days. This year Independence Day falls on Monday. The day on which Mohan's birthday will fall this year will be (a) monday (b) tuesday (c) Sunday (d) thursday 27. There are seven persons up on the ladder. 'A' is further up than 'E' but is lower than ' C ' . - ' B ' is in the middle. ' G ' is between 'A' and ' B ' . 'E' is between ' B ' and 'F'. I f ' F ' is between 'B' and 'D', then the person on the top of the ladder will be (a) A (b) B (c) C (d) D 28. If one couple has seven daughters and each daughter, has a brother, how many members are there in the family? (a) 15 (b) 16 (c) 10 (d) 9 29. Find the missing number in the series : 3, 5, 6, 12, 12, ?, 24, 26 (a) 19 (b) 14 (c) 17 (d) 15 30. If GREEN is coded as FSDFM, PINK will be coded as (a) OHOJ (b) OJOL (c) OJNJ (d) OJML Directions (Q. 23 to Q.25): Choose the one alternative which is opposite in meaning to the given word. 31. X, Y and Z are three professionals - a lawyer, an engineer and a doctor - but not in the same order. P, Q and R are three ladies. R marries an engineer, Q does not want to marry a lawyer. Y is a doctor. P married Z who is not an engineer. Who is married to the doctor ? (a) Q (b) P (c) R (d) can't say Directions (Q. 32 to Q.35) : In the following figure, the circle stands for insurance agents, the square stands for hard-working, the triangle stands for rural and the rectangle stands for graduates. Study the figure carefully and answer the questions that follow. 23. Ostentatious (a) ignorant (c) awkward 32. Non-rural and hard working insurance agents who are graduates are indicated by the region ? (a) 5 (b) 7 .(c) 9 (d) 10 50 (b) unpretentious (d) bankrupt ""BIOLOGY TODAY | APRIL 07,63 33. Insurance agents who are n either graduates nor hard working but rural, are represented by the region ? (a) 8 (b) 10 (c) 11 (d) 12 34. Non-graduates insurance agents who are not hard working and who do not belong to rural areas are represented by the region ? (a) 5 (b) 6 (c) 8 (d) 11 35. Find t h e m i s s i n g n u m b e r amongst the given alternatives at the place of sign of interrogation (?). (a) 35 (b) 40 (c) 49 (d) 53 Directions (Q. 36 to Q.38) : In each of the following questions a letter series is given. Some of the letters of the series are missing. These missing letters are given in that order as one of the four alternatives below the series. Find out the correct alternative. 36. a b - c a b b - c a a - b c c a b - c a b - c c (a) a b b c c (b) b a a b c (d)bcaac (c) b c b b b 37. a b - a - b c a b c - b - a b b a b b (b)aaccb (a) b b a c c (d)bbcaa (c) b c c a a 38. a a c — a — c b a b - b - a c c a b — b a - c b (b) a c b a b a (a) b c a c b a c b c a c b (d) cabcab (c) 39. Four words are given. Which one pf them will appear third if arranged in the dictionary order? (a) hick (b) hide (c) high (d) hay 40. In a certain language, Rum Pum Po means Boy is mad. Turn Po To means Girl is beautiful and Dum Pum Ko means they are mad. Which word in that language means Boy ? (a) Rum (b) Pum (c) Dum (d) Po 41. 717161==? (a) 129 (b) 119 (c) 131 (b) o°o (c) (d) 43. Which of the following figures is exactly the mirror image of the given figure when the mirror is held at AB. ""BIOLOGY TODAY | APRIL 07 , (c) (d) : Select the related letters/ the given alternatives. White flag : Surrender War : Liberty 45. Sculptor : Chisel :: Author : ? (b) paper (c) book (a) table (d) pen 46. 63 : 9 :: ? : 14 (b) 42 (c) 96 (d) 56 (a) 68 47. Book : Bookcase : : Clothes : ? (b) press (a) rack wardrobe (d) naphthalene balls (c) 48. In the following series, the number of letters skipped in between the adjacent letters in the series is the same. Which of the following series observe this rule? (a) URNJ (b) ZVRO (c) HDAW (d) CYUQ 49. In the given question, some letters have been paired and have been arranged by skipping the preceeding letter. Which one of the given responses follow this rule? (a) TSWVZA (b) TSWVZY (c) HILKON (d) POSRUV 50. Select the letter from the given responses, which can form a new meaningful word when it is added to the end of each of the following words. PAR MAR CAR (a) K (b) T (c) E (d) S (d) 141 42. If each circle represents a class of objects/ideas, written below, then find out the answer figure which illustrates the better relationship among them. "Cats, Rats, Animals" (a) (a) (b) Directions (Q. 44 to Q.47) words/numbers/figures from 44. Pigeon : Peace :: ? (a) Crown : Head (b) (c) Laurels : Victory (d) ANSWERS 1. 6. 11. 16. 21. 26. 31. 36. 41. 46. (b) (b) (c) (c) (d) (c) (a) (c) (c) (a) 2. 7. 12. 17. 22. 27. 32. 37. 42. 47. (d) (c) (d) (c) (a) (c) (d) (a) (d) (c) 3. '(b) 8. (c) . 13. (a) 18. (c) 23. (b) 28. (c) 33. (d) 38. (c) 43. (c) 48. (d) 4. 9. 14. 19. 24. 29. 34. 39. 44, 49. (d) (b) (c) (c) (a) (a) (a) (b) (b) (d) 5. 10. 15. 20. 25. 30. 35. 40. 45. 50. • (d) (a) (b) (d) (a) (d) (b) (a) (d) (b) • • 51 MCQ'S .n . W u inn €i n 1311^^l^s^^yp^^ Must for AIIMS, CBSE, BHU, AFMC, Manipal, UP-CPMT & other PMT's 1. Damage to the 9th cranial nerve (a) will not affect the oral phase of swallowing (b) will affect the pharyngeal phase of swallowing (c) will not a f f e c t the e s o p h a g e a l p h a s e of swallowing (d) all of the above are correct. Goitre, a bilateral enlargement of the thyroid gland can s o m e t i m e s o c c u r in both h y p o - and hyperthyroidic states when (a) thyroid stimulating hormone levels are high because of low thyroxine negative feedback or because of a pituitary tumor, respectively (b) iodine in the diet is too low or thyroid releasing hormone decreases below normal, respectively (c) either Hashimoto's thyroiditis or a thyroid tumor are present, respectively (d) thyroid stimulating hormone level increase in the presence or absence of thyroid releasing hormone, respectively. Fertilization of the ovum by the sperm cell (a) normally occurs in the uterus (b) can take place several days after ovulation (c) is an event in which the egg plays only a passive role (d) i n v o l v e s c o m p l e x m o l e c u l a r i n t e r a c t i o n between the sperm cell membrane and the zona pellucida. 4. Chief cell secretion of pepsinogen will as secretin levels increase in the blood (a) increase (b) remains unchanged (c) decrease (d) none of these. During resting conditions, for normal expiration to occur (a) the alveoli must actively contract (b) the alveolar pressure must be greater than atmospheric pressure (c) the diaphragm must forcefully contract (d) the pressure inside the pulmonary capillaries must fall. During exercise, which of the following is expected to decrease? (a) heart rate (b) total peripheral resistance (c) O, consumption (d) stroke work. For more these type of questions read Human Biology Wl-fcG- Human Biology 700 + MCQ's from AIIMS, CBSE-PMT, AFMC, BHU, VMMC, Manipal & other National I State PMT's 2000 + High Yield Fact's 400 + Points to remember Available at all leading bookshops all over the country 52 ""BIOLOGY TODAY | APRIL 07,63 There are given some transport characteristics shared by thick ascending limb cells and the cells of the early distal tubule. I Both are impermeable to water II Both reabsorb sodium and chloride ions III Both act to reduce the osmolarity of the tubular fluid Identify which of the following statements are true? (a) I, II and III (b) I and II (c) II and III (d) none of these. I. Regarding the regulation of body temperature (a) in a temperate climate under normal conditions, the greatest loss of body heat occurs through radiation (b) during water immersion, heat is mainly lost via radiation (c) the thalamus is the centre for integrating thermal information (d) as the skin possesses thermoreceptors, its temperature is regulated more closely than the core temperature. >. In the testis (a) Sertoli cells permit free diffusion of watersoluble substances between the seminiferous tubules and the blood (b) leydig cells secrete testosterone (c) Sertoli cells respond to t e s t o s t e r o n e by synthesizing androgen binding protein (d) Sertoli cells line the seminiferous tubules and directly give rise to the developing sperm. 10. During the ovarian cycle (a) the first part of the menstrual cycle is known as the luteal phase (b) the initiation of the preantral phase of follicular development is under the control of LH (c) the development of the antral follicle depends on the expression of receptors for FSH and LH (d) ovulation occurs in response to a sudden increase in plasma FSH. II. In what ways does the interior surface of the membrane of a resting neuron differ from the external surface? (a) negatively charged and contains less sodium (b) positively charged and contains less sodium (c) negatively charged and contains more sodium (d) positively charged and contains more sodium. ""BIOLOGY TODAY | APRIL 07 , 12. Triglycerides travel through lymphatic vessels in the form of small particles called (a) chylomicrons (b) lipid globules (c) micelles (d) ascites cells. 13. The white scar tissue in the ovary representing a former site of an ovarian follicle is called (a) corpus haemorrhagicum (b) corpus luteum (c) corpus albicans (d) corpuscle. 14. Which of the following kinds of protein circulates in the blood and coats the surfaces of microbes to form a membrane attack complex? (a) complement (b) interferon (c) histamine (d) antigen. 15. The major functions of loose connective tissue include (a) o c c u p y i n g spaces between organs and supporting epithelia (b) supporting and surrounding blood vessels and nerves (c) c u s h i o n i n g organs, storing lipids, and facilitating diffusion (d) all of the above. ANSWERS I. 6. II. (d) (b) (a) 2. 7. 12. (a) (a) (a) 3. 8. 13. (d) (a) (c) 4. 9. 14. (a) (b) (a) 5. (b) 10. (c) 15. (d) mmm of your Favourite M a g a z i n e s Volumes of the following years are available : Mathematics Today 2006,2005, 2004 Chemistry Today 2006,2005,2001 Physics For You 2006,2005 Biology Today 2006,2005,2004,2003,2002,2001 Price of e a c h v o l u m e : Rs.170 A d d R s . 2 5 (for each volume) for p o s t a g e . How to order: Send money by demand draft/money order. Demand Dralt should be drawn in favour of MTG Learning Media (P) Ltd. Mention the volume you require along with your name and address. Mail your order to : Circulation Manager, MTG Learning Media (P) Ltd., 406, Ta] Aptt, Ring Road, Near Safdarjung Hospital, New Delhi - 29. Tel.: 26197344 e-mail: info@mtg.in 53 Very Similar £ Examora B H U (Screening) - 2007 1. Organisms included under fungi by Whittaker possess (a) ingestive nutrition (b) absorptive nutrition (c) holophytic nutrition (d) holozoic nutrition. 2. (a) (c) (d) Which one is transferred in non-HFR conjugation ? nuclear genes (b) F-plasmid F-gene from F-plasmid any plasmid. 3. (a) (b) (c) (d) Heterocysts are specialised in nitrogen fixation under aerobic conditions nitrogen fixation under anaerobic conditions formation of internal hormogones saprotrophism. 4. Communal slime moulds are named so because they show (a) aggregation of myxamoebae (b) fusion of myxamoebae (c) formation of naked spores (d) both (b) and (c). 5. A parasite that is flagellate in alternate host and nonflagellate in human body is (a) Trypanosoma (b) Leishmania (c) Trichomonas (d) Plasmodium. 6. (a) (b) (c) In gametangial contact there is syngamy or fusion of two similar gametes fusion of two gametangia contact between sex organs for transfer of male gamete or nucleus (d) transport of male gamete to the tip of female sex organs. ST Mty20CfT v. (c) union between two nonmotile gametes (d) union between two young individuals. 9. (a) (b) (c) (d) In Marchantia. the sex organs are embedded in thallus developed in axils of leaves formed on stalked receptacles formed ventrally on thallus. 10. Plants which produce spores and embryo but lack vascular tissue and seeds are (a) bryophytes (b) pteridophytes (c) gymnosperms (d) algae. 11. Radial symmetry generally occurs in animals which possess (a) incomplete digestive system (b) filter feeding (c) aquatic mode of living (d) sedentary life. 12. Sponges do not have (a) sensory cells (b) gland cells (c) nerve cells (d) all of these. 13. Stages in which Fasciola hepatica intermediate host and primary host are (a) miracidium and metacercaria (b) redia and miracidium (c) metacercaria and cercaria (d) cercaria and redia. infects its 14. Cyclops is intermediate host of (a) Ancylostoma (b) Echinococcus (c) Dracunculus (d) Planaria. 7. A toadstool which is hallucinogenic in small quantities is (a) Amanita caesarea (b) Amanita phalloides (c) Amanita virosa (d) Amanita muscaria. 15. (a) (b) (d) 8. Isogamous species of Chlamydomonas show (a) clumping (b) transfer of protoplast of one into other 16. In bivalves cilia of gills help in (a) feeding (b) swimming (c) reproduction (d) all of these. 54 ' What is present in crustaceans but not in insects ? two pairs of antennae bilateral symmetry (c) chitinous exoskeleton paired limbs. ""BIOLOGY TODAY | APRIL 07,63 17. (a) (c) (d) Which is not typical of mammals? thecodont dentition (b) seven cervical vertebrae alveolar lungs ten pairs of cranial nerves. 18. An inflorescence having a single achlamydeous female flower surrounded by a number of achlamydeous male flower is (a) spadix (b) verticillaster (c) cyathium (d) capitulum. 19. The tissue system formed by dermatogen is (a) cortex (b) pith (c) epidermis (d) vascular bundles. 20. (a) (b) (c) (d) Myofibril is made of short thin myosin and long thick short thick myosin and long thin long thin myosin and short thick long thick myosin and short thin actin actin actin actin filaments filaments filaments filaments. 23. Which are believed to be absent in neurons ? (a) centrioles (b) mitochondria (c) golgi complexes (d) free ribosomes. 24. Cockroach of genus Blatta is called (a) German cockroach (b) Oriental cockroach (c) American cockroach (d) Australian cockroach. 25. Structure present in rat but absent in frog is (a) salivary glands (b) pancreas (c) liver (d) adrenal glands. 26. Mouth of earthworm is located on (a) prostomium (b) stomium (c) protostomium (d) peristomium. 27. If one wants to obtain precise information regarding the exact time and location of synthesis of new DNA, which of the following methods would be most effective ? (a) isolating and extracting DNA after regular intervals and estimating DNA amount (b) using radioactive precursors of nucleic acids ""BIOLOGY TODAY | APRIL 07 , 28. Match the biological m o l e c u l e s listed u n d e r column I with their biological functions listed under column II; choose the answer which gives the correct combination of the alphabets of the two columns. A. B. C. D. (a) (b) (c) (d) Youngest secondary xylem occurs between pith and primary xylem just inner to cork cambium just inner to vascular cambium just outer to vascular cambium. 21. Frictional damage during j o i n t movements is prevented by (a) elastic cartilage (b) hyaline cartilage (c) cellular cartilage (d) calcified cartilage. 22. (a) (b) (c) (d) (c) electron microscopy (d) carbon dating. Column-! (Biological molecules) Glycogen Globulin Steroids Thrombin A A A A = = = = Column-H (Functions) P. Hormone q- Biocatalyst r. Antibody s. Storage product q, B = s, C = r, D = p s, B = r, C = p, D = q r, B = q, C = s, D = p s, B = q, C = p, D = r. 29. During DNA replication, the term leading strand is applied to the one which replicates in (a) 5' —> 3' direction continuously (b) 3' —> 5' direction continuously (c) 5' —> 3' direction discontinuously (d) 3' —» 5' direction discontinuously. 30. Which of the following statements regarding a double helical molecule of DNA is true ? (a) each strand is identical (b) each strand replicates itself (c) bases are perpendicular to the axis (d) all hydroxyl groups are involved in linkage. 31. (a) (b) (d) Polyribosomes are aggregation of ribosomes and r-RNA only r-RNA (c) peroxisomes several ribosomes held together by a string of mRNA. 32. Which of the following organelles are the cells 'garbage disposal system' ? (a) peroxisomes (b) golgi complex (c) phagosomes (d) lysosomes. 33. The main component of the synaptonemal complex is (a) carbohydrate (b) fat (c) nucleic acid (d) protein. 34. The phragmoplast is organized (a) at the beginning of anaphase (b) at the end of anaphase 55 (c) at the beginning of telophase (d) at the-end of telophase. 35. (a) (b) (c) (d) Which event involves crossing over ? chromosomes are short and thick exchange of genetic material pairing of chromosomes addition of chromosomes. 36. Cyanophage is a virus that attacks blue-green algae. In cyanophage the genetic material is (a) double stranded RNA (b) double stranded DNA (c) both (a) and (b) (d) proteins. 37. The interaction not included under Bateson's factor hypothesis (a) complementary genes (b) epistasis (c) blending (d) supplementary genes. 38. The number of genotypes in a Mendelian dihybrid cross is (a) 3 (b) 16 (c) 12 (d) 9. 39. Which enzyme is responsible for the synthesis of t-RNA ? (a) RNA replicase (b) RNA polymerase (c) aminoacyl-t-RNA synthetase (d) ribosomal enzymes. 40. T h e g e n e s are r e s p o n s i b l e f o r g r o w t h and differentiation in an organism through regulation of (a) translocation (b) transformation (c) transduction and translation (d) translation and transcription. 41. In which of the following diseases, the man has an extra X-chromosome? (a) bleeder's disease (b) Down's syndrome (c) Turner's syndrome (d) Klinefelter's syndrome. 42. (2n-l) condition represent (a) tetrasomy (b) trisomy (c) monosomy (d) nullisomy. 43. Genetic variation arises by (a) recombination (b) mutation (c) evolution (d) both (a) and (b). 44. (a) (b) (c) (d) Drosophila is used in genetic studies because its chromosome complement is simple a single mating produces over 100 offspings life cycle time is small (10-20 days) all of the above. 45. What form of inheritance does a trait in humans have, which is found in the siblings of parents, where 56 the female has the trait, but is never found in siblings of parents, where only the male has the trait ? (a) X linked inheritance (b) Y linked inheritance (c) autosomal inheritance (d) maternal (extra nuclear) inheritance. 46. The Ti plasmid, is often used for making transgenic plants. This plasmid is found in (a) Azotobacter (b) Rhizobium of the roots of leguminous plants (c) Agrobacterium (d) yeast as a 2 (im plasmid. 47. Introduction of foreign gene for improving genotype is called (a) tissue culture (b) vernalization (c) genetic engineering (d) eugenics. 48. Which one of the following is useful in identifying the different strains of a causal microbe of an infectious disease ? (a) colchicine (b) Agrobacterium (c) complementry DNA (d) crystal violet. 49. A nutritionally wild type organism, which does not require any additional growth supplement is known as (a) phenotype (b) holotype (c) autotroph (d) prototroph. 50. Which of the following is a test cross ? (a) Ww x ww (b) WW x ww (c) Ww x Ww (d) ww x ww. 51. Temporary wilting occurs during noon due to (a) respiration (b) photosynthesis (c) transpiration (d) water absorption. 52. A sudden increase in C 0 2 conc. around a leaf will cause (a) wider opening of stomata (b) increase in transpiration (c) closure of stomata (d) decrease in transpiration due to closure of stomata. 53. Meristem degeneration and irregular swellings in roots occur during deficiency of (a) magnesium (b) iron (c) potassium (d) calcium. 54. (a) (b) (c) Hydroponics is growing plants in tissue culture medium solution of mineral nutrients soil culture (d) water. ""BIOLOGY TODAY | APRIL 07,63 55. (a) (b) (c) (d) Anatomy of C 4 plant leaf shows presence of peroxisomes presence of bundle sheath cells absence of mitochondria absence of bundle sheath cells. 56. the (a) (c) (d) In sugarcane, l 4 C 0 2 is fixed into malic acid with help of enzyme RuBP carboxylase (b) PEP carboxylase ribulose phosphate kinase fructose phosphatase. 57. are (a) (c) (d) Blue light is less efficient than red light though both equally effective in photosynthesis because of smaller wavelength (b) fluorescence wastage of energy inability to bring about photolysis. 58. (a) (c) (d) Photorespiration is favoured by high O z and low C 0 2 (b) high C 0 2 and low 0 2 high temperature and low 0 2 high humidity and temperature. 65. Two sets of a plant are exposed to 12 hr day and 12 hr night. In one set, the dark period is interrupted by a flash of light. There was no flowering while flowering occurred in the other set. This plant is (a) long day (b) day neutral (c) indeterminate (d) short day. 66. Monoglycerides, fatty acids and glycerol are absorbed by (a) colon (b) stomach (c) lacteals of villi (d) capillaries of villi. 67. Enzyme which does not directly act upon food substrate is (a) trypsin (b) lipase (c) enterokinase (d) amylopsin. 68. (a) (b) (c) (d) Respiratory centre of brain is stimulated by carbon dioxide content in venous blood carbon dioxide content in arterial blood oxygen content in venous blood oxygen content in arterial blood. 59. ATP formation in chloroplast and mitochondria is explained by (a) Cholodny-Went model (b) chemi-osmotic theory of Mitchell (c) Munch's mass flow theory (d) relay pump theory of Godlewski. 69. and (a) (b) (c) (d) During high blood pressure, regulations of heart beat circulation are controlled by vasodilator and vasconstrictor centres cardio-stimulatory and vasoconstrictor centres cardio-inhibitory and vasoconstrictor centres cardio-inhibitoiy and vasodilator centres. 60. A fat shall enter respiratory pathway as (a) dihydroxy acetone 3-phosphate from glycerol and acetyl CoA from fatty acid (b) glyceric acid from glycerol and acetyl CoA from fatty acid (c) only as acetyl CoA (d) only as DiHAP. 70. Oxygenated blood coming from lungs enters heart through (a) pulmonary vein (b) coronary vein (c) pulmonary artery (d) azygos. 61. (a) (b) (c) End products of anaerobic respiration are alcohol + C 0 2 + energy C02 + H20 CO, + H 2 0 + energy (d) H z O + energy. 62. Number of ATP molecules produced by one NADH is (a) 3 (b) 4 (c) 5 (d) 6 63. Growth promoter hormones are (a) IAA, ABA and CK (b) IAA, GA and ABA (c) IAA, GA and CK (d) ABA, CK and GA. 64. (a) (b) (c) (d) What is true about phytochrome? Pr absorbs red light and becomes P fr Pr absorbs yellow light and becomes P fr P fr absorbs yellow light and becomes P r P fr absorbs red light and becomes P r . ""BIOLOGY TODAY | APRIL 07 , 71. If loops of Henle were absent from mammalian nephrons, what would be expected? (a) no urine formation (b) no change in quantity or quality of urine (c) more concentrated urine (d) more dilute urine. 72. Two halves of pelvic girdle are joined together by (a) pubic symphysis (b) ischiac symphysis (c) ischiopubic symphysis (d) by fusion. 73. Nucleus pulposus occurs in (a) brain (b) liver (c) intervertebral disc (d) kidney. 74. A student is able to learn playing of harmonium more easily than type writing. Playing of harmonium is a case of (a) residual learning (b) conditioned reflex (c) short term homeostasis (d) long term homeostasis. 57 75. H-shaped grey matter is found in (a) spinal cord (b) cerebrum (c) medulla (d) cerebellum. (a) epimorphosis (b) compensatory hypertrophy (c) morphallaxis (d) autotomy. 76. (a) (b) (c) (d) 86. Evolution of man took place in (a) central America (b) Australia (c) central Asia (d) Africa. Node of Ranvier is found where nerve is covered with myelin sheath neurilemma and myelin sheath are discontinuous myelin sheath is discontinuous neurilemma is discontinuous. 77. Glucagon produced by a - c e l l s of islets of Langerhans (a) converts glucose to glycogen (b) converts glycogen to glucose (c) decreases concentration of glucose in blood (d) none of the above. 78. Release of milk from mother's breast is mediated through (a) prolactin (b) relaxin (c) oxytocin (d) progesterone. 79. Which is a gastro-intestinal hormone ? (a) prolactin (b) enterokinase (c) cholinesterase (d) secretin. 80. A person passing excessive urine and drinking excess water with normal glucose level suffers from (a) reduction in insulin secretion (b) reduction in vasopressin secretion (c) increased secretion of glucagon (d) reduced glucose release in urine. 81. (a) (b) (c) The ovule of angiosperms might be evolved from integumented megasporangium megasporangium microgametangium (d) microsporangium. 82. (a) (b) (c) (d) Insect pollinated flowers usually possess sticky pollens with rough surface large quantities of pollens brightly coloured pollens dry pollens with smooth surface. 87. The book named "Philosophic Zoologique" published in 1809 and was written by (b) Darwin (a) Mendel De Vries (d) Lamarck. (c) 88. (a) (b) (c) (d) was Genetic drift is an orderly change in gene frequencies produces greatest fluctuations in large populations is the random change in gene frequencies has nothing in common with inbreeding. 89. The disease iumpy jaw of cattle' is a (a) fungal disease (b) viral disease (c) bacterial disease (d) protozoan disease. 90. Short-lived immunity acquired from mother to foetus across placenta or through mother's milk to the infant is categorised as (a) active immunity (b) passive immunity (c) cellular immunity (d) innate non-specific immunity. Wl-fcG- BHU EXPLORER 83. In oogenesis mitotic division occurs during the formation of all the following stages except (a) first polar body (b) oogonia (c) oocytes (d) second polar body. 84. Graafian follicle contains (a) many oocytes (b) many sperms (c) a single oocyte (d) site for egg fertilisation. ^ g - M T G BOOKS |jj«| 503, Taj Apt., Ring Road Near Safdarjung Hospital New Delhi-110 029 Tel.: 26191601,26194317 85. Regeneration of a limb or tail is an example of 58 MT BIOLOGY TODAY | APRIL '07 91. Ketone bodies are byproduct of metabolism of (a) carbohydrate (b) protein (c) fat (d) all of these. 92. The science of engineering and technology applied to life sciences is (a) genetic engineering (b) pathology (c) biotechnology (d) biological science. 93. The age distribution pyramid with a wide base indicates that the (a) pre-reproductive group is the largest group (b) population size will continue to expand fast (c) the country is more likely to be industrially advanced (d) both (a) and (b). 94. Who proposed the concept of ecological pyramids ? (a) Odum (b) Clements (c) Tansley (d) Elton. 95. Soil erosion can be prevented by (a) overgrazing (b) removal of vegetation (c) afforestation (d) deforestation. 96. (a) (b) (c) (d) Thermal pollution results in depletion of oxygen increase in temperature of water bodies death of aquatic animals all of the above. 97. Minamata and itai-itai are caused by pollution of (a) mercury and lead (b) mercury and cadmium (c) lead and tin (d) lead and strontium. 98. Which one is employed for image making in CT scan ? (a) ultrasound (c) X-rays (b) positrons (d) hydrogen ions. 99. Which one of the following diseases is sexually transmitted ? (a) cancer (b) gonorrhoea (c) diphtheria (d) myocarditis. 100. Psychotropic drugs include (a) sedatives and tranquillisers (b) opiate narcotics (c) stimulants and hallucinogens (d) all of the above. ANSWERS 1. 6. 11. 16. 21. 26. 31. 36. 41. 46. 51. 56. 61. 66. 71. 76. 81. 86. 91. 96. 2. 7. 12. 17. 22. 27. 32. 37. 42. 47. 52. 57. 62. 67. 72. 77. 82. 87. 92. 97. (b) (c) (d) (a) (b) (d) (d) (b) (d) (c) (c) (b) (a) (o) (d) (c) (a) (d) (c) (d) (b) (d) (c) (d) (d) (b) (d) (c) (c) (c) (d) (c) (a) (6) (b) (b) (a) (d) (c) (b) 3. 8. 13. 18. 23. 28. 33. 38. 43. 48. 53. 58. 63. 68. 73. 78. 83. 88. 93. 98. (a) (a) (a) (c) (a) (b) (d) (d) (d) (c) (d) (a) (c) •(d) (C) (C) (a) (c) (d) (c) 4. 9. 14. 19. 24. 29. 34. 39. 44. 49. 54. 59. 64. 69. 74. 79. 84. 89. 94. 99. (a) (c) (c) (c) (b) (a) (b) (b) (d) (d) (b) (b) (a) (b) (b) (d) (c) (a) (d) (b) 5. 10. 15. 20. 25. 30. 35. 40. 45. 50. 55. 60. 65. 70. 75. 80. 85. 90. 95. 100 (b) (a) (a) (c) (a) (a) (b) (d) (d) (a) (b) (a) (d) (a) (a) (b) (a) (b) (c) (d) • • • This year UGET MANIPAL is an ONLINE examination from 03-04-2007 to 10-05-2007 N o w MTG UGET Manipal Explorer is available with a CD to give your t h o r o u g h practice of the online e x a m i n a t i o n o n your h o m e P C . M&2 UGET M A N I R PMT6XPL0R6R Dr. Sandeep fthlawal CD contains Very Similar ONLINE tests as per latest pattern Each test covers 240 questions (i) Physics (ii) Chemistry (iii) Biology (iv) English & General Aptitude - 60 60. 80 40 Book your copy TODAY! ""BIOLOGY TODAY | APRIL 07 , i m a Price : Rs. 250 59 VERY SIMILAR MODEL TEST PAPER, for AIIMS 2007 1. Maize has ten pairs of chromosomes. How many linkage groups will be present, if all the genes are mapped? (a) 20 (b) 5 (c) 40 (d) 10. 2. Which of the following is known as 'resurrection plant'? (a) Rafflesia (b) Selaginella (c) Chlorella (d) Wehvitschia. 3. Inflorescence, which begins as a dichasial cyme and ends in a monochasial cyme, is called (a) cyathium (b) biparoiis (c) verticillaster (d) thyrsus. 4. roof (a) (c) The shade of a tree is cooler than the shade of a due to transpiration (b) guttation photosynthesis (d) green leaves. 5. A vertebrate bone, which directly develops from mesenchyme, is called (a) endochondrial bone (b) dermal bone (c) replacing bone (d) all of these. 6. Where the conversion of harmful prussic acid into potassium sulphocyanide takes place ? (a) bone marrow (b) spleen (c) lymph glands (d) liver. 7. Sharpey's perforating fibres are related with (a) muscle contraction (b) fixing of teeth (c) heart contraction (d) all of these. 8. Which of the f o l l o w i n g is not applicable to coelenterates? (a) choanocytes (c) radial symmetry (b) coelenteron (d) nematoblasts. 9. A pregnant woman, who has done amniocentesis test, finds an extra barr body in her embryo. The syndrome which is likely to be associated with embryo is (a) Edward's syndrome (b) Down's syndrome 36MTBIO LOGY TODAY | MAY 07 81 (c) KJinefelter's syndrome (d) Patau's syndrome. 10. The endocrine gland of insects, which secretes the juvenile hormone, is (a) corpora albicans (b) corpora allata (c) corpora myecaena Id) ail of these. 11. Scientists pin-pointed processing perception centres a method named (a) CT scanning (c) ultra-sound imaging the location of colourin human visual cortex by (b) PET scanning (d) NMR imaging. 12. The proper scientific name of eellobiose is (a) 4-O-p-D-glucopyranosyl-D-a-gIucopyranose (b) 8-O-p-D-glucopyranosyl-D-glucose (c) 4NH 2 S0 4 -P-D-reductase (d) 6NH 2 P0 4 -a-D-reductase. 13. Which one of the following is true diiriiv.' :i reader sending the maximum complete and correct -questions. Other conditions apply. The decision of the Editor, MTG shall be Final and binding. : ""BIOLOGY TODAY |APRIL07,63 VERY SIMILAR MODEL TEST PAPER : 2007 B H U MAINS SECTION A 1. The genes controlling seven traits in pea, as studied by Mendel, were later found to be located on how many number of chromosomes? (a) five (b) four (c) seven (d) six 2. Biological weathering of rock is initially brought about by lichens that are (a) foliose (b) crustose (c) leprose (d) fruticose 3. (a) (b) (c) (d) The balancing organ of ear is lagena and sacculus semicircular canal and utriculus semicircular canal and otolith otolith and lagena 4. (a) (b) (c) (d) Stratum lucidum is found in dermis and secrete keratin epidermis and situated below stratum corneum dermis and release keratin epidermis and originates from hair follicle 5. In Opuntia, the spine is the modification of (a) leaf (b) root (c) stem (d) flower 6. Conjoint, collateral and open vascular bundles are present in (a) monocot root .(b) dicot stem (c) monocot stem (d) dicot root 7. by (a) (c) When the pollen grain is transferred to the stigma air, then this type of pollination is known as zoophily (b) anemophily entomophily (d) none of these 8. Which of the following class adult and bilateral symmetrical (a) echinodermata (b) (c) amphibia (d) had radial symmetrical larva? reptilia nemathelminthes 9. Food vacuole of Amoeba is analogous to which organ of rabbit? (a) kidney (b) stomach (c) lung (d) alimentary canal 36 MT BIO LOGY TODAY | MAY 07 ™ 10. Which fossil man has been known from Shivalik hills in India? (a) Sinanthropus (b) Ramapithecus (c) Pithecanthropus (d) Zinjanthropus 11. Which of the following is the hardest wood? (a) Cedrus devodara (b) Tectona grandis (c) Shorea robusta (d) Dalbergia sisso 12. If flowers are cut and dipped in dilute NaCl solution, then (a) transpiration is low (b) endo-osmosis occurs (c) no bacterial growth takes place (d) absorption of solute inside flower cell takes place 13. (a) (b) (c) (d) Which of the following is haploid in gymnosperm? megaspore mother cell, root, leaf pollen grain, megaspore, nucleus pollen grain, megaspore, root endosperm, pollen grain, megaspore 14. The excretory material of bony fish is (a) amino acid (b) urea (c) ammonia (d) protein 15. (a) (b) (c) (d) The pacemaker is placed on the interventricular septum on the interauricular septum in wall of right atrium in the wall of left atrium 16. and (a) (b) (c) What is difference between ABO incompatibility Rh + factor? less haemorrhagic does not require transfusion 1st child dies (d) all of these 17. The 'witches broom' legume is caused by (a) fungus (b) bacteria (c) virus (d) mycoplasma 18. (a) (b) (c) (d) Glaucoma is caused due to which of the following? canal of Schlemn is blocked increase in the size of eye ball opacity of lens vitreous humour becomes dry 19. Trilobites were evolved during which of the following period? 47 (a) ordovician (c) Cambrian 20. (a) (b) (c) (d) (b) pre-cambrian (d) Silurian Duramen is present in inner region of secondary wood part of sap wood outer region of secondary wood region of pericycle 21. A plant has 25 chromosomes in "microspore mother cell". The number of chromosomes in its endosperm will be (a) 36 (b) 24 (c) 12 (d) 48 22. 'Ozone hole' refers to (a) r e d u c t i o n in the t h i c k n e s s of ozone layer in stratosphere (b) reduction in ozone layer in stratosphere (c) hole in the ozone layers (d) increased concentration of ozone 23. Stem cuttings are commonly used for propagation of (a) banana (b) rose (c) mango (d) cotton 24. Halophytes grow on physiologically dry soil due to presence of (a) excessive salt in water (b) excessive salt in plants (c) excessive humidity outside (d) dry soil 25. A 'drunk person' has earliest effect on which part of brain? (a) cerebrum (b) cerebellum (c) pons (d) medulla oblongata 26. Fertilised ovum in humans is transplanted in the uterus, how many days after fertilisation ? (a) 1 day (b) 7 days (c) 8 days (d) 10 days 27. on (a) (b) (c) Vitamin D is synthesised by skin, by action of sunlight cephano-cholesterol 7-hydroxy cholesterol cholesterol (d) all of these 28. Hand of man, wing of bat and flipper of seal represents (a) homologous organs (b) vestigial organs (c) analogous organs (d) evolutionary organs 29. for (a) (b) 48 The factor which is not limiting in normal conditions photosynthesis is light chlorophyll content of leaf (c) water (d) C 0 2 30. Embryo from egg without fertilisation is (a) parthenogenesis (b) apogamy (c) parthenocarpy (d^allogamy 31. Enzymes which help in ele6tfc&-transfer are (a) cytochromes (b) isomerases (c) chlorophylls (d) Krebs cycle enzymes 32. Resin duct of a gymnospermous stem is an example of (a) big vacuole (b) intercellular space (c) lysigenous cavity (d) schizogenous cavity 33. (a) (c) (d) Mulching helps in soil fertility (b) mud formation fish cultivation soil and moisture conservation 34. due (a) (c) During rainy seasons, the ground becomes slippery to dense growth of lichens (b) bacteria green algae (d) cyanobacteria 35. In C 4 pathway of photosynthesis, carbon dioxide combines with (a) phosphoglyceric acid (b) oxaloacetic acid (c) phosphoenol pyruvate (d) ribulose 1, 5 diphosphate 36. During conjugation in Paramecium (a) out of the four micronuclei formed, three nuclei degenerate (b) out of the twelve macronuclei formed, four nuclei degenerate (c) zygote nucleus undergoes eight successive divisions in each conjugant (d) out of the sixteen nuclei formed from zygote, 12 become macronuclei and 4 micronuclei 37. What is the similarity between fly, mosquitoe and cockroach ? (a) 13 chamber heart (b) all have 3 pairs of legs (c) open excretory system (d) all belong to class insecta 38. Which animal has a notochord throughout its life? (a) bird (b) fish (c) snake (d) Amphioxus 39. Recombinant DNA technology is related with (a) C. Darwin (b) Stanley Cohen (b) Herbert Boyer (d) both (b) and (c) 40. In an ecosystem, bacteria are considered as (a) micro consumers (b) macro consumers (c) primary consumers ""BIOLOGY TODAY |APRIL07,63 (d) secondary consumers 41. Nerve impulse initiates with movements of (a) K* (b) Mg + + (c) Ca (d) Na + 42. Which of the following is an example of conditioned reflex? (a) cycling (b) withdrawal of hand on touching a hot plate (c) watering of mouth at the smell of food (d) flowing of tears while cutting onions 43. In a healthy adult man, the commonest and smallest type of leucocyte, is called (a) basophils (b) measles (c) eosinophils (d) lymphocytes 44. (a) (b) (c) (d) Nucleotide consist of one nitrogenous base nitrogenous base + sugar nitrogenous base + sugar + phosphate none of the above. 45. Haemoendothelial placenta is found in (a) man and ape (b) cow and goat (c) deer and camel (d) rat and rabbit. 46. Genes for antibiotic resistance are located on (a) nucleus (b) plasmid (c) chromosome (d) plastid 47. Fibrous root system is better adapted than tap root system for (a) storage of food (b) anchorage of plant to soil (c) absorption of water and mineral (d) transport of organic matter. 48. Edible part of coconut (a) mesocarp (b) endosperm (c) ectocarp (d) all of these. 49. Triticale is obtained by crossing wheat with (a) Raphanus (b) Secale (c) Agelops (d) Oryza. 50. Formation of glucose from protein is (a) gluconeogenesis (b) glycogenolysis (c) glycogenesis (d) glycolysis. SECTION B Direction : In the following: items more than one of the answers given may be correct. Select the correct answers and mark it according to the code. Code: (a) 1. 2 and 3 are correct (b) 1 and 2 are correct (c) 2 and 4 are correct (d) 1 and 3 are correct 36 MT BIO LOGY TODAY | MAY 07 51. Which of the following are modes of reproduction of both cyanobacteria and bacteria ? 1. binary fission 2. budding 3. fragmentation 4. endosperm. 52. Below are given few importances of algae. Which among them describes about industrial uses of algae? 1. antibiotic chlorellin is obtained from Chlorella 2. a jelly like substance called agar is obtained from Gelidium 3. Spirulina is a fast growing-, nontoxic blue green alga 4. carrageenin is obtained from Chondrus crispris. 53. 1. 2. 3. 4. Ascomycetes fungi are characterised by occurrence of crozier formation absence of motile cells asexual reproduction by conidia clamp connection on dikaryotic hyphae. 54. The common Indian Cycas species are 1. Cycas rumphii 2. Cycas circinalis 3. Cycas beddomei 4. Cycas media. 55. Which among the following, denote the correct match? 1. legume, siliqua, follicle - dehiscent fruit 2. sorosis and syconus - develops from complete inflorescence 3. achene, cremocarp, drupe - succulent fruits 4. Impatiens, Acanthus, Andrographis - dispersal by wind. 56. Dichogamy is 1. the condition of bisexual flowers in which male and female reproductive part matures at different times 2. divided into two types protogyny and protandry 3. is a mode of adaptation for cross pollination 4. is observed in Calotropis, Primula. 57. Students of a class, were given two different slides containing transverse section of dorsiventral and isobilateral leaves. Under microscope, they observed few characters. Which of the following would are characters of isobilateral leaf? 1. the leaves are amphistomatic 2. undifferentiated mesophyll cells 3. palisade and spongy parenchyma 4. vascular bundles are conjoint, collateral and closed 58. The drug Henbane is obtained from Hyoscyamus niger is obtained from 1. stem 2. dried leaves 3. seeds 4. . flowering tops. 59. Deficiency of zinc is responsible for 49 1. 2. 3. 4. 1. Khaira disease of rice Heart rot of sugar beet White bud of maize Die back of Citrus. 60. Which of the following statements are correct regarding respiratory quotient ? 1. it is measured by Ganong's respirometer 2. in CAM plants the value of R.Q. is zero 3. for organic acids R.Q. is more than one 4. in anaerobic respiration R.Q. is negative. 61. 1. 2. 3. 4. Dark reaction is also termed as Pentose phosphate pathway Calvin cycle Hatch Slack Pathway Blackman's reaction. 62. The physiological mechanism of flowering is associated with 1. vernalization 2. photoperiodism 3. senescence 4. abscission. 63. Bioassay of GA includes 1. dwarf maize leaf sheath 2. 3. a-amylase test 4. avena curvature test tobacco pith culture. 64. The indicator of gold deposits are 1. Amaranthus 2. Thuja 3. Astragallus 4. Equisetum. 65. Exotic species introduced in India include 1. water hyacinth 2. Lantana camara 3. Eupatorium odoratum 4. Nile Perch. 66. 1. 2. 3. 4. Heterosis is superiority of hybrid over parents termed by G.H. Shull results from hybridization method of tissue culture. 67. Examples of organophosphates (a type of chemical pesticide) are 1. malathion 2. ethion 3. aladrin 4. carbaryl. 68. 1. 2. 3. Z-DNA is characterised by which of the following? 1 turn has 12 base pairs repeating unit is dinucleotide diameter is 18A 4. right handed coiled. 69. 1. 2. 3. 4. Reverse transcriptase enzyme is discovered by Roger RNA dependent DNA polymerase enzyme have been reported in Drosophila associated with reverse transcription. 70. Terminalzation is 50 2. 3. 4. a s s o c i a t e d with s e p a r a t i o n of h o m o l o g o u s chromosomes observed both in diplotene and diakinesis chiasma shifts towards the chromosome end beginning of RNA synthesis. 71. Besides nucleus DNA is also present in 1. mitochondria 2. chloroplast 3. ribosomes 4. golgi bodies. 72. 1. 2. 3. 4. Cystolith is calcium oxalate crystals like bunch of grapes excretory material of plants calcium carbonate crystals. 73. cell 1. 3. Which of the following terms are associated with wall ? plasmodesmata 2. symplasm apoplasm 4. trilaminar. 74. The genetic code deciphering associates 1. Nirenberg 2. Robert Holley 3. H. G. Khorana 4. F. H. C. Crick 75. 1. 2. 3. 4. Funaria is included in mossy bryophyte because absence of elaters rhizoids are multicellular presence of peristome teeth dehiscence of capsule is regular. 76. Which of the f o l l o w i n g are the f u n c t i o n s of phospholipid ? 1. help in the digestion and absorption of lipids by aiding emulsification of lipids in the intestine and by f o r m i n g t h e l i p o p r o t e i n layer a r o u n d t h e chylomicrons 2. act as surfactants in the lungs and help keep the alveoli their shape and function 3. its formation in the liver seems to be an essential pre-requisite for the rapid oxidation of fatty acids in that viscera 4. used for conjugation (detoxication) with halogenated aromatic compounds (eg bromobenzene). 77. Which of the following statements are true ? 1. The cytoskeleton of the erythrocyte is formed by three groups of proteins - spectrin, actin and ankrin 2. H a e m o g l o b i n ( R B C ) , m y o g l o b i n ( m u s c l e ) , cytochromes, peroxidase and catalase (present in all cells) are all heme containing proteins 3. In sickle cell haemoglobin (HbS), the 6th amino acids of the beta chain is glutamic acid instead of the normal valine of HbA ""BIOLOGY TODAY |APRIL07,63 4 IgA is the first antibody formed in response to an antigen. 2. 78. All enzymes are broadly divided into the groups based on their function. These groups are 1. oxidoreductases 2. hydrolases 3. isomerases 4. acid phosphatase. 3. 79. Which of the following examples belong to class crustacea of phylum arthropoda ? 1. Astacus 2. Lepisma saccharina 3. Daphnia 4. Julus. 80. The penis contains three cylindrical masses of erectile tissue. These are 1. two dorsal corpora cavernosa 2. one ventral corpus spongiosum 3. two ventral corpora cavernosa 4. fibrous tissue tunica albuginea. 81. 1. 2. 3. 4. Steps of transcription (synthesis of RNA) involves formation of aminoacyl enzyme complex binding of RNA polymerase to DNA duplex modification of released polypeptides base pairing. 82. Which of the following features are the characteristics of protosome ? 1. spiral cleavage 2. indeterminate cleavage 3. determinate cleavage 4. enterocoely. 4. An inactive form of pepsin Serotonin - Argentaffin cells - S m o o t h m u s c l e stimulant Intrinsic factor - Chief cells - Helps in absorption of vitamin C. 86. Metabolic consequences by the effect of insulin hormone on muscle are 1. decreased fat breakdown in fat cells 2. increased protei n synthesis 3. plasma glucose i s converted to alpha glycerophosphate and used in fat synthesis 4. increased musc'le glycogen. 87. When depolarization of axolemma during nerve conduction takes pllace 1. Na + move insid e smd k+ mo ve outside 2. equal a m o u n t s of Na + and k+ move out across axolemma 3. it reverses the membrane potential with the inner s u r f a c e b e c o m i n g p o s i t i v e and outer s u r f a c e electronegativ e 4. more Na + m o v e outside. 88. Factors controlling regeneraition seem to be 1. neural 2. Ihormonal 3. genetic 4. chemical. 89. 1. 2. 83. The left ventricle is larger than the right ventricle ; 3. because 1. the oxygenated blood that it receives from the left 90. atrium has to be pump throughout the body 1. 2. the chamber of the left ventricle has walls that are 2. three times the thickness of the right ventricle 3. 3. it pumps less blood, but it pumps it harder 4. 4. the blood in it contains more oxygen than any other 91. chamber. 1. 84. Which of the following is part of the mononuclear 2. phagocyte system ? 3. 1. macrophages 2. osteoclasts 4. 3. effector T cell 4. memory B cells. 92. 85. Which of the f o l l o w i n g match (the chemical 1. constituents, source & their functions) are correct? 1. HC1 - Parietal cells Acid environment needed 2. for destruction of bacteria, 3. protozoa & worms. Acid 4. medium essential for the conversion of pepsinogen 93. to pepsin. ""BIOLOGY TODAY |APRIL07 , Pepsinogen - Ch ief cells - Viral disease; of animals are foot and mouth disease mastitis rinderpest 4. coccidiosis. Metastasis is regeneration of cancer cells spread of cancer cells rapid division in cancer cells connected with malignant tumor. NMR is considered better than C'T scan in ability t o obtain images in any plane study o f tissue metabolism not using ionising radiation low frequency. Sea anemone may o f t e n occur associated with hermit crab, protecting the latter from enemies by its stinging cells shows commensalism with hermit crab t a n swim only has a slit like mouth and only single whorl of tentacles Laser is 51 1. 2. 3. 4. low amplitude surface energy resonance. light amplified by stimulated emission of radiations meant for improving blood supply to heart walls and other organs by emission of radiation meant for breaking of kidney stones and gall bladder stones into fine powder for removal through natural excretory process instead of surgery 3. 4. in meiosis homologous pairs of chromosomes are pulled apart in meiosis chromosomes do not exchange genetic material. ANSWERS 1. (c) 7. (b) 94. Which of the following have pneumatic bone and 13.(d) keeled sternum? 19.(b) 1. peafowl 2. flying bat 25.(b) 3. pigeon 4. Archaeopteryx. 31. (a) 95. Post mating isolation takes place due to 37. (d) 1. gametic incompatibility 2. hybrid breakdown 43.(d) 3. zygotic mortality 4. geographic isolation 49. (b) 96. Autosomal genetic disorders are 55. (b) 1. Down's syndrome 2. Kwashiorkar 61. (c) 3. Cri-du-chat syndrome 4. phenylketonuria. 67. (b) 97. Which of the following statements are incorrect? 73.(a) 1. Earthworm shows bilateral symmetry 79.(d) 2. Endoskeleton of earthworm is sclerotized 85.(a) 3. Vibrissae are stiff and tactile hair. | 91.(a) 4. Anus of frog is the common urinogenital organ for i 97. (c) outlet for faeces, nitrogenous wastes and sex 98. Which of the following statements are true? 1. The Aedes mosquito is primarily responsible for the transmission of malaria. 2. The term "black d e a t h " refers to blue-black haemorrhages under the skin seen in bubonic plague victims 3. In a d d i t i o n to spreading epidemic typhus, mosquitoes also are primarily responsible for transmitting the organisms associated with trench fever and relapsing fever. 4. A biological vector is an organism, usually an arthropod, in which the agent of disease normally passes through some developmental stage (s) including sexual reproduction, before being transmitted by the vector to susceptible host. 99. 1. 2. 3. Bioherbicides are Phytophthora palmivora Chrysolina beetles Bauveria bassiana 4. 3. (b) 9. (d) 15. (c) 21. (a) 27. (b) 33. (d) 39. (d) 45. (d) 51. (b) 57. (b) 63.(d) 69. (c) 75.(a) 81. (c) 87. (d) 93.(c) 99. (b) 4. (b) 10. (b) 16. (b) 22. (a) 28. (a) 34. (d) 40. (a) 46. (b) 52. (c) 58. (c) 64. (c) 70.(a) 76.(a) 82. (d) 88.(bl 94. (a) 100.(c) 5. (a) 11.(c) 17. (d) 23.(b) 29. (b) 35. (c) 41. (a) 47. (b) 53. (a) 59. (d) 65. (a) 71.(b) 77. (b) 83.(b) 89.(d) 95.(a) 6. (b) 12. (b) 18. (a) 24. (a) 30. (a) 36. (a) 42. (a) 48. (b) 54. (a) 60. (a) 66. (a) 72.(c) 78.(a) 84. (b! 90. (c) 96.(d) Wtf/G- BHU EXPLORER Available at wading book-shops' throughout India Send D.D/M.O in favour of MTG Books. Add Rs. 35 for postage. Bacillus popilliae 100.Which of the following statements is/are not true about meiosis? 1. meiosis occurs in reproductive cells 2. meiosis results in four diploid daughter cells. 52 2. (b) 8. (a) 14. (c) 20. (a) 26.(b) 32. (d) 38. (d) 44. (c) 50. (a) 56. (a) 62.(b) 68. (a) 74. (a) 80. (b) 86.(c) 92.(b) 98. (c) gjfe©- M T G B O O K S gS? eooo 503, Taj Apt.. Ring Road' Near Safdarjung Hospital New Delhi-110 029 Tel.: 26191601, 2619431 MT B!OLOC,Y TODAY | MAY 07 MCQ'S in Human Biofegy Must for AIIMS, CBSE, BHU, AFMC, Manipal, UP-CPMT & other PMT's 1. Which of the following is not an action of atrial natriuretic peptide? (a) inhibition of A D H secretion (b) inhibition of renin secretion (c) constriction of the afferent arteriole (d) inhibition of inner medullary collecting duct sodium reabsorption. 2. N o n c i l i a t e d s i m p l e c o l u m n a r epithelium often contains , which increases the surface area for secretion and absorption. (a) flagella (b) microvilli (c) collagen fibres (d) all of these. 3. Nonshiveringthermogenesis is the major mechanism by which rodents and human newborns raise their body temperature by increasing the catabolism of fats in brown adipose tissue (b) changing metabolic rates without increasing 0 2 consumption (c) increasing subcutaneous temperature along with 0 2 consumption (d) activation of |3 receptors of brown adipose tissue temperature sensors. 5. An increase in which of the following shifts the haemoglobin oxygen dissociation curve to the left? (a) oxygen affinity of haemoglobin (b) HT concentration (c) p C 0 2 (d) temperature. Certain members of the bacterial genus Clostridium are ubiquitous in the soil and water but only cause disease in humans under highly specific conditions. For example, C.tetani can cause t e t a n u s w h e n introduced into the body in a puncture wound and C. septicum can cause gangrene when introduced into dead and dying tissue. The best explanation for the restrictions on the ability of these bacteria to cause disease is that member of this genus are easily destroyed by white blood cells that are present in living tissue (b) require other bacteria to break down living cells in order to feed on the cell components (c) can only grow and reproduce in the absence of oxygen (d) requires high temperatures associated with localized inflammation to grow and reproduce. (a) (a) 6. In normal human blood For more these type of questions read Human Biology Human Biology 700 + MCQ's from AIIMS, CBSE-PMT, AFMC, BHU, VMMC, Manipal & other National I State PMT's 2000 + High Yield Fact's I 400 + Points to remember Available at all leading bookshops all over the country 66 ""BIOLOGY TODAY|APRIL07,63 7. 8. (c) a positive charge on both sides (a) the eosinophil is the most common type of white (d) a negative charge on both side.s. blood cell (b) the iron is mostly in haemoglobin I 12. Zona glomerulosa or glomerular area of adrenal (c) there are more white blood cells than red blood cortex is involved in cells (a) water and electrolyte balance (d) there are more platelets than red cells. (b) carbohydrate metabolism (c) steroid and hormone secretion Which of the following is not synthesized in post (d) blood pressure. ganglionic sympathetic neurons? (a) histamine (b) dopamine 13. In ageing there is (c) norepinephrine (d) acetylcholine. (a) decrease in cholesterol level (b) increase in calcium content of arteries and cartilage (c) decrease in calcium content of arteries and cartilage (d) decrease in blood area. Which of the following sensations is not generated by impulses initiated in'naked nerve endings? (a) touch (b) pain (c) cold (d) taste. 9. Ovulation in human female normally takes place during the menstrual cycle j 14. At the end of the first meiotic division, male germ (a) at the mid secretory phase cell differentiates into (b) just before the end of the secretory phase (a) secondary spermatocyte (c) at the beginning of the proliferative phase (b) primary spermatocyte (d) at the end of the proliferative phase. (c) spermatogonium (d) spermatid. 10. Which is true of muscle contraction? 2+ 15. Which set is mixed with the food in small intestine? (a) sarcolemma becomes permeable to Ca ions (a) saliva, gastric juice, bile (b) sarcolemma becomes permeable to Na + ions (b) gastric juice, bile, pancreatic juice (c) sarcolemma becomes nonpermeable to Na+ ions (cl bile, pancreatic juice and succus entericus (d) concentration of Ca 2+ ions is reduced in (d) bile, pancreatic juice and saliva. myoplasm. 11. A nerve fibre is depolarized when it acquires (a) a negative charge in the intracellular fluid and positive charge outside (b) a positive charge in the intracellular fluid and negative charge outside ANSWERS I6. II- (c) (b) (b) 2. 7. 12. (b) (a) (a) 3. 8. 13. (a) (d) (b) 4. 9. 14. (a) (d) (a) 5. (c) 10. (b) 15. (c) This year UGET MANIPAL is an ONLINE examination from 03-04-2007 to 10-05-2007 N o w MTG UGET Manipal Explorer is available with a CD to give you t h o r o u g h practice of the online e x a m i n a t i o n on your h o m e P C . EK23 UGET MANIPJfi PMT€XPlOR€R CD contains 3 Very Similar ONLINE tests as per latest pattern csw x IMTMmt PMieXPLOfi^R Each test covers 240 questions (i) Physics (ii) Chemistry (iii) Biology (iv) English & General Aptitude 60 60 80 40 B o o k your c o p y TODAY! ""BIOLOGY TODAY |APRIL07 , 67 Solved Paper 2007 CBSE-PMT 1. (a) (b) (c) (d) ICBN stands for International Code of Botanical Nomenclature International Congress of Biological Names Indian Code of Botanical Nomenclature Indian Congress of Biological Names. 2. W h i c h p a i r of t h e f o l l o w i n g Basidiomycetes? (a) puffballs and Claviceps (b)i Peziza and stink horns (c) Morchella and mushrooms (d) birds nest fungi and puffballs. belongs to 3. Biological organisation starts with (a) cellular level (b) organismic level (c) atomic level (d) submicroscopic molecular level. 4. Identify the odd combination of the habitat and the particular animal concerned. (a) Sunderbans - Bengal Tiger (b) Periyar - Elephant (c) R a n n o f K u t c h - Wild Ass (d) Dachigam National Park - Snow Leopard. 5. If you suspect major deficiency of antibodies in a person, to which of the following would you look for confirmatory evidence? (a) serum globulins (b) fibrinogen in the plasma (c) haemocytes (d) serum albumins. 6. A common test to find the genotype of a hybrid is by (a) crossing of one F 2 progeny with female parent (b) studying the sexual behaviour of F, progenies (c) crossing of one F, progeny with male parent (d) crossing of one F 2 progeny with male parent. 7. (a) The Okazaki fragments in DNA chain growth polymerize in the 3'- to - 5' direction and forms replication fork (b) prove semi-conservative nature of DNA replication (c) polymerize in the 5'- to - 3' direction and explain 3' - to - 5' D N A replication (d) result in transcription. 8. (a) 68 Which one of the following statement is correct? there is no evidence of the existence of gills during embryogenesis of mammals (PRELIMS) (b) all plant and animal cells are totipotent (c) ontogeny repeats phylogeny (d) stem cells are specialized cells. 9. In w h i c h o n e of t h e f o l l o w i n g t h e B O D (Biochemical Oxygen Demand) of sewage (S), distillery effluent (DE), paper mill effluent (PE) and sugar mill effluent (SE) have been arranged in ascending order? (a) S E < P E < S < D E (b) PE < S < SE < DE (c) S < D E < P E < S E (d) SE < S < PE < DE. 10. (a) (b) (c) The concept of chemical evolution is based on interaction of water, air and clay under intense heat effect of solar radiation on chemicals possible origin of life by combination of chemicals under suitable environmental conditions (d) crystallization of chemicals. 11. Which one of the following is surrounded by a callose wall? (a) male gamete (b) egg (c) pollen grain (d) microspore mother cell. 12. (a) (b) (c) (d) Probiotics are cancer inducing microbes new kind of food allergens live microbial food supplement safe antibiotics. 13. One of endangered species of Indian medicinal plants is that of (a) Ocimnm (b) garlic (c) Nepenthes (d) Podophyllum, 14. What is true about Nereis, scorpion, cockroach and silver fish? (a) they all possess dorsal heart (b) none of them is aquatic (c) they all belong to the same phylum (d) they all have jointed paired appendages. 15. T h e living o r g a n i s m s can be u n e x c e p t i o n a l l y distinguished from the non-living things on the basis of their ability for (a) interaction with the environment and progressive evolution (b) reproduction (c) growth and movement (d) responsiveness to touch. 16. A person who is on a long hunger strike and is surviving only on water, will have MT BIOLOGY TODAY|APRIL'07 (a) less amino acids in his urine (b) more glucose in his blood (c) less urea in his urine (d) more sodium in his urine. 17. The length of DNA molecule greatly exceeds the dimensions of the nucleus in eukaryotic cells. How is this DNA accommodated? (a) super-coiling in nucleosomes (b) DNase digestion (c) through elimination of repetitive DNA (d) deletion of non-essential genes. 18. A sequential expression of a set of human genes occurs when a steroid molecule binds to the (a) messenger RNA (b) DNA sequence (c) ribosome (d) transfer RNA. 19. In a coal fired power plant electrostatic precipitators are installed to control emission of (a) N O x (b) SPM (c) CO (d) S 0 2 . 20. Select the wrong statement from the following. (a) Both chloroplasts and mitochondria have an internal compartment, the thylakoid space bounded by the thylakoid membrane (b) Both chloroplasts and mitochondria contain DNA (c) The chloroplasts are generally much larger than mitochondria (d) Both chloroplasts and mitochondria contain an inner and an outer membrane. 21. Geometric representation of age structure is a characteristic of (a) population (b) landscape (c) ecosystem (d) biotic community. 22. During transcription, RNA polymerase holoenzyme binds to a gene promoter and assumes a saddle - like structure. What is it's DNA-binding sequence? (a) A ATT (b) CACC (c) TATA (d) TTAA. 23. A plant requires magnesium for (a) protein synthesis (b) chlorophyll synthesis (c) cell wall development (d) holding cells together. 24. In the prothallus of a vascular cryptogam, the antherozoids and eggs mature at different times. As a result (a) there,is high degree of sterility (b) one can conclude that the plant is apomictic (c) self fertilization is prevented (d) there is no change in success rate of fertilization. 25. Ergot of rye is caused by a species of (a) Uncinula (b) Ustilago (c) Claviceps (d) Phytophthora. 36 MT BIO L O G Y T O D A Y | MAY 07 26. The Finches of Galapagos islands provide an evidence in favour of (a) evolution due to mutation (b) retrogressive evolution (c) biogeographical evolution (d) special creation. 27. Which one of the following is a slime mould? (a) Physarum (b) Thiobacillus (c) Anabaena (d) Rhizopus. 28. The population of an insect species shows an explosive increase in numbers during rainy season followed by its disappearance at the end of the season. What does this show? (a) the food plants mature and die at the end of the rainy season (b) its population growth curve is of J-type (c) the population of its predators increases enormously (d) S-shaped or sigmoid growth of this insect. 29. Which of the following is a flowering plant with nodules containing filamentous nitrogen-fixing microorganism? (a) Crotalaria juncea (b) Cycas revoluta (c) Cicer arietinum (d) Casuarina equisetifolia. 30. Which one of the following is being utilized as a source of biodiesel in the Indian countryside? (a) beetroot (b) sugarcane (c) Pongamia (d) Euphorbia. 31. For a critical study of secondary growth in plants, which one of the following pairs is suitable? (a) teak and pine (b) deodar and fern (c) wheat and maiden hair fern (d) sugarcane and sunflower. 32. Which one of the following is a fat-soluble vitamin and its related deficiency disease? (a) Retinol Xerophthalmia (b) Cobalamine Beri-beri (c) Calciferol Pellagra (d) Ascorbic acid Scurvy. 33. Two cells A and B are contiguous. Cell A has osmotic pressure 10 atm, turgor pressure 7 atm and diffusion pressure deficit 3 atm. Cell B has osmotic pressure 8 atm, turgor pressure 3 atm and diffusion pressure deficit 5 atm. The result will be (a) no movement of water (b) equilibrium between the two (c) movement of water from cell A to B (d) movement of water from cell B to A. 34. In which one of the following preparations are you likely to come across cell junctions most frequently? (a) thrombocytes (b) tendon (c) hyaline cartilage (d) ciliated epithelium. 69 35. if y'Gu arc ? s ked to classify the various algae into distinct groups, which of the following characters you should choose? (a) nature of stored food materials in the cell (b) structural organization of thallus (c) chemical composition of the cell wa|J (d) types of pigments present in the cell. 36. About 98 - £ m a s s Qf ev£ry ,ivjng organism is composed of just six elements including carbon, hydrogen, nitrogen, oxygen and (a) sulphur and magnesium (b) magnesium and sodium (c) calcium and phosphorus (d) phosphorus and sulphur. 37. Which one of the fallowing statements is correct? (a) Both Xtoiobacier and Rhizobium fix atmospheric nitrogen in root nodules of plants. (b) Cyanobacteria such as Anabaena and Nostoc are important mobilizers of phosphates and for plant nutrition in soil (c) At present it is not possible to grow maize without chemical fertilizers (d) Extensive use of chemical fertilizers may lead to eutrophication of nearby water bodies. 38. In the hexaploid wheat, the haploid (n) and basic (x) numbers of chromosomes are (a) n = 21 and * = 21 (b) n = 21 and = 14 (c) n = 21 and x = 1 (d) n = 7 and Jt = 21. 39. Passage cells are thin - walled cells found in (a) phloem elements that serve as entry points for substance for transport to other plant parts (b) testa of seeds to enable emergence of growing embryonic axis during seed germination (c) central region of style through which the pollen tube grows towards the ovary (d) endodermis of roots facilitating rapid transport of water from cortex to pericycle. 40. What is common between parrot, platypus and kangaroo? (a) toothless j a w s (b) functional post-anal tail (c) ovoparity (d) homoiothermy. 41. Bowman's glands are located in the (a) anterior pituitary (b) female reproductive system of cockroach (c) olfactory epithelium of our nose (d) proximal end of uriniferous tubules. 42. Which one of the following pairs is wrongly matched? (a) Yeast Ethanol (b) Streptomycetes Antibiotic (c) Coliforms Vinegar 70 (d) Methanogens Gobar gas. 43. Which part of ovary in m a m m a l s acts as an endocrine gland after ovulation? (a) stroma (b) e ^ - j , ; ' , epithelium Ccl (d) Graafian follicle v i ! ! ! : : : ; "membrane 44. Opening of flo~» ^ m t 0 f l o w e r S i is a t y p e of (s) autonomic movement of variation (b) paratonic movement of growth (c) autonomic movement of growth (d) autonomic movement of locomotion. 45. Which one of the following is a matching pair of a body feature and the animal possessing it? (a) Ventral central Leech nervous system (b) Pharyngeal gill slits Chamaeleon absent in embryo (c) Ventral heart Scorpion (d) Post-anal tail Octopus. 46. All enzymes of TCA cycle are located in the mitochondrial matrix except one which is located in inner mitochondrial membranes in eukaryotes and in cytosol in prokaryotes. This enzyme is (a) isocitrate dehydrogenase (b) malate dehydrogenase (c) succinate dehydrogenase (d) lactate dehydrogenase. 47. The first acceptor of electrons from an excited chlorophyll molecule of photosystem II is (a) iron-sulphur protein (b) ferredoxin (c) quinone (d) cytochrome. 48. Differentiation of organs and tissues in a developing organism, is associated with (a) differential expression of genes (b) lethal mutations (c) deletion of genes (d) developmental mutations. 49. Which one of the f o l l o w i n g statements about mycoplasma is wrong? (a) They are pleomorphic (b) They are sensitive to penicillin (c) They cause diseases in plants (d) They are also called PPLO. 50. Which one of the following pairs is mismatched? (a) Apis indica honey (b) Kenia lacca lac (c) Bombyx mori silk (d) Pi la g/obosa pearl. 51. A person is having problems with calcium and phosphorus metabolism in his body. Which one of the following glands may not be functioning properly? (a) parotid (b) pancreas (c) thyroid (d) parathyroid. ""BIOLOGY TODAY|APRIL07,63 (a) have more than 90 per cent similar genes 52. A genetically engineered micro-organism used successfully in bioremediation of oil spills is a species of (b) look similar and possess identical secondary (a) Trichoderma (b) Xanthomonas metabolites (c) have same number of chromosomes (c) Bacillus (d) Pseudomonas. 53. In the leaves of C 4 plants, malic acid formation (d) can reproduce freely with each other and form seeds. during C 0 2 fixation occurs in the cells of 61. Inheritances of skin colour in humans is an example of (a) bundle sheath (b) phloem (a) point mutation (b) polygenic inheritance (C) epidermis (d) mesophyll. 54. Flagellated male gametes are present in all the three (c) codominance (d) chromosomal aberration. of which one of the following sets? 62. When two species of different genealogy come to (a) Zygnema, Saprolegnia and Hydrilla resemble each other as a result of adaptation, the (b) Fucus, Marsilea and Calolropis phenomenon is termed (c) Riccia, Dryopteris and Cycas (a) microevolution (b) co-evolution (d) Anthoceros, Funaria and Spirogvra. 55. In the mean and the median pertaining to a certain (c) convergent evolution (d) divergent evolution. character of a population are of the same value, the 63. Increased asthmatics attacks in certain seasons are related to following is most likely to occur (a) eating fruits preserved in tin containers (a) a bi-modal distribution (b) inhalation of seasonal pollen (b) a T-shaped curve (c) a skewed curve (c) low temperature (d) a normal distribution. 56. One gene - one enzyme relationship was established (d) hot and humid environment. 64. Among the human ancestors the brain size was for the first time in more that 1000 CC in (a) Salmonella typhimurium (a) Homo erectus (b) Ramapithecus (b) Escherichia coli (c) Homo habilis (d) Homoneanderlhalensis. (c) Diplococcus pneumoniae (d) Neurospora crassa. 65. Industrial melanism as observed in peppered moth 57. Two genes R and Y are located very close on the proves that chromosomal linkage map of maize plant. When RRYY (a) the melanic form of the moth has no selective and rryy genotypes are hybridized, the F2 segregation advantage over lighter form in industrial area will show (b) the lighter-form moth has no selective advantage either in polluted industrial area or non-polluted (a) segregation in the expected 9 : 3 : 3 : 1 ratio area (b) segregation in 3 : I ratio (c) melanism is a pollution-generated feature (c) higher number of the parental types (d) higher number of the recombinant types. (d) the true black melanic forms arise by a recurring random mutation. 58. In cloning of cattle a fertilized egg is taken out of j the mother's womb and 66. A high density of elephant population in an area (a) in the eight cell stage, cells are separated and can result in cultured untill small embryos are formed which (a) intra specific competition are implanted into the womb of other cows (b) inter specific competition (b) in the eight cell stage the individual cells are (c) predation on one another s e p a r a t e d u n d e r e l e c t r i c a l field f o r f u r t h e r (d) mutualism. development in culture media 67. A drop of each of the following, is placed separately (c) from this upto eight identical twins can be produced on four slides. Which of them will not coagulate? (d) the egg is divided into 4 pairs of cells which are (a) blood serum implanted into the womb of other cows. (b) sample from the thoracic duct of lymphatic system 59. Ultrasound of how much frequency is beamed into (c) whole blood from pulmonary vein human body for sonography? (d) blood plasma. (a) 15 - 30 MHz (b) 1 - 15 MHz 68. Which one of the following ecosystem types has (c) 45 - 70 MHz (d) 30 - 45 MHz. the highest annual net primary productivity? 60. Two plants can be conclusively said to belong to (a) tropical deciduous forest the same species if they I (b) temperate evergreen forest MT BIO LOGY TODAY | MAY 07 71 (c) temperate deciduous forest (d) tropical rain forest. 69. In human body, which one of the following is anatomically cor recti (a) Collar bones 3 pairs (b) Salivary glands 1 pair (c) Cranial nerves 10 pairs (d) Floating ribs 2 pairs. 70. Telomere repetitive DNA sequences control the function of eukaryotic chromosomes because they (a) are RNA transcription initiator (b) help chromosome pairing (c) prevent chromosome loss (d) act as replicons. 71. Spore dissemination in some liverworts is aided by (a) indusium (b) calyptra (c) peristome teeth (d) elaters. 72. Which one of the following elements is not an essential micronutrient for plant growth? (a) Zn (b) Cu (c) Ca (d) Mn. 73. The overall goal of glycolysis, Krebs cycle and the electron transport system is the formation of (a) ATP in one large oxidation reaction (b) sugars (c) nucleic acids (d) ATP in small stepwise units. 74. Adaptive radiation refers to (a) evolution of different species from a common ancestor (b) migration of members of a species to different geographical areas (c) power of adaptation in an individual to a variety of environments (d) adaptations due to geographical isolation. 75. Which one of the following pairs, is not correctly matched? (a) Gibberellic acid - Leaf fall (b) Cytokinin - Cell division (c) IAA - Cell wall elongation (d) Abscissic acid - Stomatal closure. 76. Select the correct statement from the following? (a) Fitness is the end result of the ability to adapt and gets selected by nature (b) All mammals except whales and camels have seven cervical vertebrae (c) Mutations are random and directional (d) Darwinian variations are small and directionless. 77. Male gametes in angiosperms are formed by the division of (a) generative cell (b) vegetative cell 72 (c) microspore mother cell (d) microspore. 78. In pea plants, yellow seeds are dominant to green. If a heterozygous yellow seeded plant is crossed with a green seeded plant, what ratio of yellow and green seeded plants would you expect in F, generation? (a) 9 : 1 (b) 1 : 3 (c) 3 : 1 (d) 50 : 50. 79. Which one of the following mammalian cells is not capable of metabolising glucose to carbon-dioxide aerobically? (a) unstriated muscle cells (b) liver cells (c) red blood cells (d) white blood cells. 80. A human male produces sperms with the genotypes AB, Ab, aB, and ab pertaining to two diallelic characters in equal proportions. What is the corresponding genotype of this person? (a) AaBB (b) AABb (c) AABB (d) AaBb. 81. What is common to whale, seal and shark? (a) thick subcutaneous fat (b) convergent evolution (c) homoiothermy (d) seasonal migration. 82. One of the important consequences of geographical isolation is (a) preventing speciation (b) speciation through reproductive isolation (c) random creation of new species (d) no change in the isolated fauna. 83. Lysozyme that is present in perspiration, saliva and tears, destroys (a) certain types of bacteria (b) all viruses (c) most virus-infected cells (d) certain fungi 84. In the human female, menstruation can be deferred by the administration of (a) combination of FSH and LH (b) combination of estrogen and progesterone (c) FSH only (d) LH only. 85. Which one of the following is not a constituent of cell membrane? (a) glycolipids (b) proline (c) phospholipids (d) cholesterol. 86. Compared to a bull a bullock is docile because of (a) higher levels of cortisone (b) lower levels of blood testosterone (c) lower levels of adrenaline/noradrenaline in its blood (d) higher levels of thyroxine. ""BIOLOGY TODAY | JULY 07 87. During the transmission of nerve impulse through a nerve fibre, the potential on the inner side of the plasma membrane has which type of electric change? (a) first positive, then negative and continue to be negative (b) first negative, then positive and continue to be positive (c) first positive, then negative and again back to positive (d) first negative, then positive and again back to negative. 88. Which one of the following pairs of organisms are exotic species introduced in India? (a) Lantana camara, water hyacinth (b) water hyacinth, Prosopis cinereria (c) nile perch, Ficits religiosa (d) Ficits religiosa, Lantana camara. 89. In gymnosperms, the pollen chamber represents (a) a cavity in the ovule in which pollen grains are stored after pollination (b) an opening in the megagametophyte through which the pollen tube approaches the egg (c) the microsporangium in which pollen grains develop (d) a cell in the pollen grain in which the sperms are formed. 90. Molecular basis of organ differentiation depends on the modulation in transcription by (a) ribosome (b) transcription factor (c) anticodon (d) RNA polymerase. 91. Which of the following is an example of negative feedback loop in humans? (a) secretion of tears after falling of sand particles into the eye (b) salivation of mouth at the sight of delicious food (c) secretion of sweat glands and constriction of skin — _ Jblood vessels when it is too hot (d) constriction of skin blood vessels and contraction of skeletal muscles when it is too cold. 92. The two polynucleotide chains in DNA are (a) discontinuous ~ (b) antiparallel (c) semiconservative (d) parallel. 93. Which of the following pairs are correctly matched? Animals Morphological features (i) Crocodile 4-chambered heart Parapodia (ii) Sea urchin Metagenesis (iii) Obelia Thecodont (iv) Lemur (b) only (i) and (iv) (a) (ii), (iii) and (iv) (d) (i), (iii) and (iv). (c) only (i) and (ii) 94. Which one of the following pairs of structures MT BIO LOGY TODAY | MAY 07 distinguishes a nerve cell from other types of (a) vacuoles and fibres (b) flagellum and medullary sheath (c) nucleus and mitochondria (d) perikaryon and dendrites. 95. (a) (b) (c) (d) In maize, hybrid vigour is exploited by crossing of two irbred parental lines harvesting seeds from the most productive plants inducing mutations bombarding the seeds with DNA- 96. Which one of the following is a viral disease of poultry? (a) coryza (b) new castle disease (c) pasteurellosis (d) salmonellosis. 97. The wavelength of light absorbed by Pr form of phytochrome is (a) 680 nm (b) 720 nm (c) 620 nm (d) 640 nm. 98. Which one of the following is not a bioindicator of water pollution? (a) blood-worms (b) stone flies (c) sewage fungus (d) sludge-worms. 99. Feeling the tremors of an earthquake a scared resident of seventh floor of a multistoryed building starts climbing d o w n the stairs rapidly. Which h o r m o n e initiated this action? (a) adrenaline (b) glucagon (c) gastrin (d) thyroxine. 1 0 0 . " F o o l i s h s e e d l i n g " d i s e a s e of rice led to t h e discovery of (a) ABA (b) 2, 4-D (c) IAA (d) GA. ANSWER 1. (a) 7. (c) 13.(d) 19. (b) 25.(c) 31.(a) 37. (d) 43.(d) 49.(b) 55. (d) 61.(b) 67.(a) 73.(d) 79. (c) 85.(b) 91.(d) 97. (a) 5. (d) 3. (d) 4. (d) 11. (c) 9. (b) 10. (c) 17. (a) 15. (b) 16. (c) 23. (a) 21. (a) 22. (c) 29. (c) 27. (a) 28. (b) 35. (a) 33. (c) 34. (d) 41. (c) 39. (d) 40. (d) 47. (c) 45. (a) 46. (c) 53. (d) 51. (d) 52. (d) 59. (d) 57. (c) 58. (a) 65. (c) 63. (b) 64. (d) 71. (d) 69. (d) 70. (c) 77. (a) 75. (a) 76. (a) 83. (d) 81. (b) 82. (b) 89. (b) 87. (d) 88. (a) 95. (b) 93. (d) 94. (d) (b) 99. (a) 100. (d) For detailed solutions read MTG's 2. 8. 14. 20. 26. 32. 38. 44. 50. 56. 62. 68. 74. 80. 86. 92. 98. (a) (d) (a) (b) (d) (d) (c) (c) (d) (b) (d) (d) (a) (a) (c) (a) 6. 12. 18. 24. 30. 36. 42. 48. 54. 60. 66. 72. 78. 84. 90. 96. (c) (c) (b) (c) (c) (d) (c) (a) (c) (d) (a) (c) (d) (b) (d) (b) •• updated C B S E - P M T Explorer (Screening) 73 Solved Paper 2007 KERALA-PMT The primary CO z acceptor in plants having C 4 pathway is (a) phosphoglyceric acid (b) glyceraldehyde phosphate (c) phosphoenol pyruvate (d) oxaloacetic acid (e) aspartic acid. (b) steady state phase, lag phase and log phase (c) slow growing phase, lag phase and steady state phase (d) lag phase, steady state phase and logarithmic phase (e) lag phase, log phase and steady state phase. 2. Choose the correct combinations of labelling the Identify the wrong statements regarding postfertilisation development. (a) The ovary wall develops into pericarp (b) The outer integument of ovule develops into tegmen (c) The fusion nucleus (triple nucleus) develops into endosperm (d) The ovule develops into seed (e) The ovary develops into fruit. 1. carbohydrate molecule involved in the Calvin cycle. Atmosphere I CO. + HjO ATP + NADPHj z l Match the items in Column -1 with Column - II and choose the correct option. Column - II Column - I Sucrose, Starch (a) (b) (c) (d) (e) (i) (i) (i) (i) (i) ADP + NADP RuBP (ii) Triose phosphate (iii) PGA PGA (ii) RuBP (iii) Triose phosphate PGA (ii) Triose phosphate (iii) RuBP RuBP (ii) PGA (iii) Triose phosphate Triose phosphate (ii) PGA (iii) RuBP The Respiratory Quotient (R. Q.) of some of the compounds are 4, 1 and 0.7. These compounds are identified respectively as (a) malic acid, palmitic acid and tripalmitin (b) oxalic acid, carbohydrate and tripalmitin (c) tripalmitin, malic acid and carbohydrate (d) palmitic acid, carbohydrate and oxalic acid (e) oxalic acid, carbohydrate and malic acid. 4. Given below is a graph drawn on the parameters of growth v e r s u s t i m e . A, B, C respectively represent (a) exponential phase, log phase and steady state phase Size Time 36 MT BIO LOGY TODAY | MAY 07 A. B. C. D. E. (a) (b) (c) (d) (e) Human urine Gibberella fujikuroi Herring fish DNA Ripening fruits Aged leaves of plants A A A A A - 2, 2, 1, 5, 3, B B B B B - 5, 3, 5, 4, 2, C C C C C - 4, 2, 3, 1, 1. 2. 3. 4. 5. D D D D D - 3, 5, 4, 2, 5, Cytokinin Auxin Ethylene Abscisic acid Gibberellins E E E E E - 4 1 3 1 4. The natural plant honnone isolated from corn kernels and coconut milk is (a) florigen (b) GA 3 (c) free auxins (d) zeatin (e) indole acetic acid. When pollen is transferred from anther of a flower to stigma of another flower of the same plant it is referred to as (a) allogamy (b) xenogamy (c) geitonogamy (d) autogamy (f) cross pollination. 35 9. 6-furfuryl amino purine, 2- 4-dichlorophenoxy acetic acid and i n d o l e - 3 a c e t i c acid are e x a m p l e s respectively for (a) synthetic auxin, kinetin and natural auxin (b) gibberellin, natural auxin and kinetin (c) natural auxin, kinetin and synthetic auxin (d) kinetin, synthetic auxin and natural auxin (e) natural auxin, gibberellin and kinetin. (d) A - 2 , B - 4 , C - 1, D - 3 (e) A - 5, B - 4 , C - 3 , D - 2 . 10. In a pyramid of numbers, in a grassland ecosystem, the largest population is that of (a) producers (b) tertiary consumers (c) secondary consumers (d) primary consumers (e) herbivores. 15. Some of the stages in the hydrarch are labelled as A. Marsh meadow stage B. Reed swamp stage C. Submerged plant stage D. Phytoplankton stage and E. Submerged free floating plant stage Identify the choice that represents the correct sequence of these stages. (a) D, C, E, B and A (b) C, E, A, B and D (c) B, D, C, A and E (d) D, E, C, B and A (e) E, C, B, A and D. 11. Black-foot disease is caused due to groundwater contaminated with excess of (a) nitrate (b) fluoride (c) arsenic (d) sulphur (e) mercury. 16. Choose the wrong pair. (a) Salvodora - Desert (b) Cenchrus - Savanna (c) Abies - Coniferous forest (d) Quercus - Broad leaf forest (e) Tectona - Temperate forest. 12. Consider the following statements A. By the end of twentieth century, the forest cover in India was reduced to 19.4 per cent B. National Forest Policy was implemented in the year 1988 C. The average annual production of dry grass or hay in India is about 250 million tons D. About 10% of the world's population lives in arid or semi arid regions Of these statements (a) A and B are true (b) A, C and D are not true (c) A, B and C are true (d) C is not true (e) C and D are true. 17. Under Column -1, a list of gases that are known to have a 'greenhouse effect' is given. Relate them to their main source selecting from the list given under Column - II. 13. Which of the f o l l o w i n g group of gases cause photochemical smog? (a) 0 3 , PAN and CO (b) HC, NO and PAN j c ) O z , PAN and N 0 2 (d) 0 2 , PAN and N 0 3 (e) 0 3 , PAN and N 0 2 . 14. Match the f o l l o w i n g and c h o o s e t h e c o r r e c t combination from the options given A. B. C. D. Column - I Column - II Visible light Ultraviolet X-Rays Infrared 1. 2. 3. 4. 5. (a) A - 1, B - 3, C - 4, D - 5 (b) A - 3 , B - 2 , C - 1, D - 5 (c) A - 4, B - 3, C - 2, D - 1 36 0.1 to 1 nm 400 to 700 nm Longer than 740 nm 100 to 400 nm < 0.1 nm Column - II Column - I 1. secondary pollutant from car exhausts 2. combustion of fossil fuels, wood, etc 3. denitrification 4. refrigerators, aerosol, sprays 5. cattle, rice fields, toilets. A. nitrous oxide B. chlorofluorocarbons (CFCs) C. methane D. ozone (0 3 ) E. carbon dioxide (a) (b) (c) (d) (e) A A A A A - 3, 5, 4, 1, 2, B B B B B -4, - 1, - 5, - 3, - 4, C C C C C - 5, 3, 1, 4, 5, D D D D D - 1, 4, 2, 5, 1, EE EEE- 2 2 3 2 3. 18. Blue-baby syndrome is caused by (a) cadmium pollution (b) mercury poisoning (c) chronic exposure to arsenic (d) excess nitrate in drinking water (e) excess fluoride in drinking water. 19. Which of the following statements regarding species interdependence are true? A. An association of two species where one is benefitted and other remains unaffected is called mutualism ""BIOLOGY TODAY |APRIL07,63 B. An interspecific association where both partners d e r i v e b e n e f i t f r o m each other is called commensalism C. A direct food relation between two species of animals in which one animals kills and feeds on another is referred as predation D. A relationship between two species of organism where both the partners are benefitted from each other is called symbiosis. (a) A and B only (b) C and D only (c) A and C only (d) B and C only (e) B and D only. 20. Which one of the following regarding ecological pyramid is not correct ? (a) In most ecosystems, the pyramid of numbers and biomass are upright (b) In tree-dominated ecosystem the pyramid of numbers is inverted (c) The pyramid of energy expresses mainly the rate of food production (d) In deep water ecosystem, the pyramid of biomass is upright (e) The total energy flow at successive trophic level always decreases. 21. The species of plants that play a vital role in controlling the relative abundance of other species in a community are called (a) edge species (b) link species (c) keystone species (d) pioneer species (e) successional species. 22. Which of the following is incorrectly matched ? (a) Explant — Excised plant part used for callus formation (b) Cytokinins - Root initiation in callus (c) Somatic embryo - Embryo produced from a vegetative cell (d) Anther culture - Haploid plants Undifferentiated mass of (e) Callus cells. 23. Which one of the following pathogen cause canker disease ? (a) Meloidogyne incognita (b) Anguina tritici (c) Xanthomonas citri (d) Pseudomonas rubilineans (e) Phytophthora infestans. 24. Find out the pairs, which are correctly matched ? A. Cyanobacteria 1. Biopesticides B. Mycorrhiza - 2. Solubilization of phosphate ""BIOLOGY TODAY |APRIL07 , C. Bacillus thuringiensis D. Single cell protein (a) A and 2 (c) C and 4 (e) B and 4. - 3. Cry protein - 4. Rhizobia. (b) B and 3 (d) A and 3 25. Which of the following is/are true ? A. Biowar - Biowar is the use of biological weapons against humans and or their crops and animals B. Bioethics - Bioethics is the unauthorised use of bioresources and traditional knowledge related to bioresources for commercial benefits C. Biopatent - Exploitation of bioresources of other nations w i t h o u t p r o p e r authorisation (a) B only (b) A only (c) A and B only (d) A and B only (e) B and C only. 26. W h o d i s c o v e r e d r e c o m b i n a n t D N A ( r D N A ) technology ? (a) Har Gobind Khorana (b) James D. Watson (c) Stanley Cohen and Herber Boyer (d) Walter Sutton and Avery (e) Williams Bateson and Hugo de Vries. 27. Match List - I and List - II and select the correct option. List - I List - II A. Biological pigments B. Chemical messengers C. Important constituent of blood D. Four carbon rings (a) (b) (c) (d) (e) A A A A A - 2, 2, 3, 4, 3, B B B B B - 4, 1, 4, 3, 4, C C C C C - 3, 4, 2, 1, 1, i. Sodium chloride ii. Steroids iii. Prostaglandins iv. Terpenes D D D D D - 1 3 1 2 2. 28. Choose the correct sequence in the hierarchy of taxonomic categories in descending order. (a) species - genus - family - order - class - division (b) division - o r d e r - class - family - genus - species (c) division - class - family - order - genus - species (d) species - genus - family - class - order - division (e) division - class - order - family - genus - species. 37 29. From w h i c h of the f o l l o w i n g algae, agar is commercially extracted ? A. Gracilaria B. Fucus C. Sargassum D. Gelidium E. Turbinaria (a) C and E (b) B and C (c) D and E (d) A and B (e) A and D. 30. Match the following with correct combination. Column - I A. B. C. D. E. (a) (b) (c) (d) (e) Column - II Anthoceros Adiantum Sargassum Prothallus Asterales A A A A A - 6, 5, 5, 3, 1, 1. 2. 3. 4. 5. 6. B - 5, B - 4, B - 1, B - 2, B-4, C 1, D - 3 , C • 3, D - 2 , C • 2, D - 4, C • 1, D - 5, C 3, D - 5, Walking fern Alga Inferae Gametophyte Hornwort Liverwort EEEEE- 4 1 3 4 2. 31. Match Column - 1 with Column - II and select the correct option. Column - I (Type of Chloroplast) A. B. C. D. (a) (b) (c) (d) (e) Cup shaped Girdle shaped Stellate Reticulate A A A A A - 2, - 3, - 3, -4, -3, B B B B B - 4, - 1, - 4, - 3, -4, Column - II (Algae) 1. 2. 3. 4. C - 3, C-4, C - 2, C - 1, C - 1, Ulothrix Oedogonium Chlamydomonas Zygnema D - 1 D-2 D- 1 D- 2 D - 2. 32. Which of the following gymnosperm is a bushy trailing shrub ? (a) Ephedra (b) Cycas (c) Pimts (d) Araucaria (e) Cedrus. 33. Which of the following correctly represents the type of fruits given ? (a) 1. Berry; 2. Caryopsis; 3. Drupe; 4. Sorosis; 5. Aggregate (b) 2. Berry; 3. Caryopsis; 4. Drupe; 1. Sorosis; 5. Aggregate (c) 2. Berry; 3. Caryopsis; 4. Drupe; 5. Legume; 1. Aggregate (d) 1. Beccate; 3. Caryopsis; 4. Drupe; 1. Sorosis; 5. Composite (e) 2. Berry; 3. Caryopsis; 4. Drupe; 1. Sorosis; 5. Legume. 34. Uniparous, biparous and multiparous systems of branching are found respectively in (a) Mirabilis, Datura and Vine (b) Saraca, Mirabilis and Euphorbia (c) Vine, Polyalthia and Saraca (d) Casuarina, Saraca and Croton (e) Euphorbia, Croton and Polyalthia. 35. Match the items in Column - 1 with Column - II and choose the correct alternative. A. B. C. D. E. Tubercular storage roots 1. Tinospora 2. Heritiera Pneumatophores Haustoria 3.. Asparagus 4. Viscum Prop-roots Assimilatory roots 5. Screwpine A - 2, A - 3, A - 3, A-5, (e A - 3, (a (b) (c (d) B - 3, B - 4, B - 1, B-4, B - 2, C-4, C - 5, C-2, C-5, C - 4, D D D D D - 5, - 1, -5, -2, -5, E E E E E - 1 - 2 -4 - 1 - 1. 36. Match Column - I with Column - II and choose the correct answers. Column - II Column - I Coleorhiza Food storing tissue Parthenocarpic fruit Single seeded fruit developing from monocarpellary superior ovary E. Membranous seed coat A. B. C. D. (a) (b) (c) (d) (e) 38 Column - II Column - I A A A A A - 3, 4, 5, 1, 4, B B B B B - 1, 2, 1, 3, 5, C-4, C - 5, C - 3, C - 2, C - 1, D D D D D 1. 2. 3. 4. Grapes Mango Maize Radicle 5. Endosperm -2, - 1, -4, -5, -2 E- 5 E —3 E-2 E-4 E-3. ""BIOLOGY TODAY|APRIL07,63 37. Plants with single whorl of perianth are placed under (a) Class : Monocot Sub class : Monochlamydeae (b) Class : Dicot Series : Monochlamydeae (c) Class : Dicot Sub class : Monochlamydeae (d) Class : Monocot Sub class : Gamopetalae (e) Class : Dicot Series : Bicarpellatae. 38. The floral formula of the given floral diagram is (b) Br K Pappus C(5) A(5) G ( l ) (c) Br £ • K Pappus C(5) A ( s ) , G (d) Br ^Pappus C (5) A(5) , G p ) (e) Br £ K Pappus C 5 A 5 G - . 39. Which of the following is not a characteristic feature of Fabaceae ? (a) D e s c e n d i n g l y i m b r i c a t e , ten s t a m e n s , diadelphous, ovary superior (b) Sepals five, gamosepalous, imbricate aestivation, placentation marginal (c) Monocarpellary, ovary superior, style long, slightly bent at the apex (d) Zygomorphic flowers, diadelphous stamens, many ovules (e) Corolla five petals, polypetalous, anterior one large and outermost. 40. Which of the following are floral characters of Malvaceae ? (a) P e d i c e l l a t e , bracteate, hermaphrodite, t e t r a m e r o u s , a c t i n o m o r p h i c c o m p l e t e and superior ovary (b) Compound spike, flowers bracteate, bracteolate, incomplete, bi or unisexual and hypogynous (c) P e d i c e l l a t e , h e r m a p h r o d i t e , z y g o m o r p h i c , complete and superior ovary (d) Head inflorescence, bracteate, hermaphrodite or unisexual, actinomorphic, or zygomorphic and inferior ovary (e) J o i n t e d p e d i c e l , b r a c t e a t e , b r a c t e o l a t e , hermaphrodite, pentamerous, actinomorphic, complete and superior ovary. 36 MT BIO LOGY TODAY | MAY 07 41. Select the wrong statement. (a) Persistent calyx is seen in Solanaceae (b) Flowers are hypogynous in Asteraceae (c) Santonin is obtained from Artemisia (d) In Poaceae, p e r i a n t h is r e p r e s e n t e d by membranous scales called lodicules (e) Parietal p l a c e n t a t i o n is c h a r a c t e r i s t i c of Brassicaceae. 42. All the following statements regarding sieve tube elements are true except (a) Their end walls have perforated sieve plates which become impregnated with lignin at maturity (b) They possess a peripheral cytoplasm as well as a large vacuole (c) Distinct proteinaceous inclusions, the P-proteins are seen evenly distributed throughout the lumen (d) Long, slender, tube-like structures arranged in longitudinal series (e) They are devoid of nucleus at maturity. 43. Match the items in Column -1 with Column - II and choose the correct option. Column - I Column - II A. Radial Vascular Bundle B. Collateral Vascular Bundle C. Bicollateral Vascular Bundle D. Amphicribral Vascular Bundle E. Amphivasal Vascular Bundle (a) (b) (c) (d) (e) A A A A A - 3, 2, 3, 4, 3, B B B B B - 4, C - 3, C - 4, C — 5, C - 1, C - 1. Cucurbita 2. Dracaena pepo 3. Roots of angiosperms 4. Sunflower stem 5. Fern 1, D - 5, E - 2 1, D - 5, E - 4 5, D - 1, E - 2 1, D - 2, E - 3 2, D - 4, E - 5. 44. Which of the following statement is/are not true ? A. Cork cambium is otherwise called phellogen B. Cork is otherwise called phellem C. Secondary cortex is otherwise called periderm D. Cork cambium, cork and secondary cortex are collectively called phelloderm (a) C and D only (b) A and B only (c) B and C only (d) B and D only (e) A and D only. 45. In meiosis I, a bivalent is an association of 39 (a) (b) (c) (d) (e) four chromatids and four centromeres two chromatids and two centromeres two chromatids and one centromere two chromatids and four centromere four chromatids and two centromeres. 46. Given below is the chemical formula of O CH3(CHJ)I4 — C — OH (a) palmitic acid (b) stearic acid (c) glycerol (d) galactose (e) fumaric acid. 47. Find out the mis-matched pair. polymer of glucose and (a) Agar sulphur containing carbohydrates - polymer of glucosamine (b) Chitin - polysaccharide linked to (c) Peptidoglycan peptides (d) Lipopolysaccharides - a complex of lipid and polysaccharide (e) Glycogen - polymer of glucose. 48. Which of the following is a water soluble vitamin ? (a) vitamin A (b) vitamin B (c) vitamin D (d) vitamin E (e) vitamin K. 49. Select the wrong statement. (a) The building blocks of lipids are amino acids (b) Majority of enzymes contain a non-protein part called the prosthetic group (c) The thylakoids are arranged one above the other like a stack of coins forming a granum (d) C r o s s i n g - o v e r occurs at pachytene stage of meiosis I (e) Steroids are complex c o m p o u n d s commonly f o u n d in cell m e m b r a n e s a n d a n i m a l hormones. 50. Which of the following element is very essential for u p t a k e and u t i l i z a t i o n of C a 2 + and m e m b r a n e function ? (a) phosphorus (b) molybdenum (c) manganese (d) copper (e) boron. 51. The cell wall of bacterium is made up of (a) cellulose (b) hemicellulose (c) lignin (d) peptidoglycan (e) glycogen. 52. Which of these is mis-matched ? 40 (a) (b) (c) (d) Amyloplasts Elaioplasts Chloroplasts Chromoplasts (e) Leucoplasts Store protein granules Store oils or fats Contain chlorophyll pigments Contain coloured p i g m e n t s other than chlorophyll Contain colourless pigment. 53. Match the following with correct combination. Column - II Column - I A. B. C. D. E. 1. 2. 3. 4. 5. Triglycerides Lactose RNA P pleats Bee wax (a) (b) (c) .(d) (e) A - 4, A - 5, A - 3, A-2, A - 3, B B B B B - 1, C - 5, D - 1, C - 4, D - 1, C - 4, D — 1, C — 4, D - 1, C - 4, D - Galactose Glycerol Palmitic acid Uracil Secondary structure 2, E 2, E 5, E — 5, 2, E E - 3 3 2 —3 5. 54. Which of the following statements is/are true ? A. T h e a p o p l a s t i c m o v e m e n t of w a t e r o c c u r s e x c l u s i v e l y t h r o u g h t h e cell w a l l w i t h o u t crossing any membranes B. Solutes present in a cell (or in any solution) increase the f r e e energy of w a t e r or w a t e r potential C. The symplastic movement occurs from cell to cell through the plasmodesmata D. M e m b r a n e p e r m e a b i l i t y d e p e n d s on t h e membrane composition, as well as the chemical nature of the solute (a) A and B only (b) B and D only (c) A, C and D only (d) A, B and D only (e) C only. 55. Which of the following is pentose phosphate pathway (a) pyruvic acid (b) (c) N A D H 2 (d) (e) ATP. produced in oxidative ? acetyl CoA NAD(P)H 56. N 2 + 8 ^ + 8H + + 16ATP 2NH + H 2 + 16ADP+ 16Pi The above equation refers to (a) ammonification (b) nitrification (c) nitrogen fixation (d) denitrification (e) reductive amination. 57. Photolysis of each water molecule in light reaction will yield MT BIOLOGY TODAY |APRIL'07 (a) (b) (c) (d) (e) 2 4 4 2 1 electrons and 4 protons electrons and 4 protons electrons and 3 protons electrons and 2 protons electron and 2 protons. (b) (c) (d) (e) 58. Which one of the following statements is wrong ? (a) Water potential is the chemical potential of the water (b) Solute potential is always negative (c) Pressure potential is zero in a flaccid cell (d) Water potential equals solute potential in a fully turgid cell (e) Pressure potential is negative in a plasmolyzed cell. 59. Which of the following represents the correct molecular formula of chlorophyll-6 ? (a) C 5 5 H 7 2 0 6 N 4 Mg (b) C 5 5 H 7 2 O s N 4 Mg (c) C 5 5 H 7 2 0 4 N 4 Mg (d) C 55 H 70 O 5 N 4 Mg (e) C 5 5 H 7 0 O 6 N 4 Mg. 60. Match the number of carbon atoms given in List - 1 with that of the compounds given in List - II and select the correct option. List - II List - I A. B. C. D. (a) (b) (c) (d) (e) 4C 2C 5C 3C A A A A A 1. 2. 3. 4. 5. Compound Compound Compound Compound - 2, 5, 3, 5, 3, B B B B B - 5, - 1, - 1, - 3, -4, C - 3, C-4, C - 4, C - 1, C - 1, D D D D D - Acetyl CoA Pyruvate Citric acid a-keto glutaric acid Malic acid 1 2 2 2 5. 61. Which of the following statements is not true ? (a) The partial pressure of oxygen in deoxygenated blood is 40 mm Hg (b) The partial pressure of oxygen in oxygenated blood is 95 mm Hg (c) The partial pressure of oxygen in the alveolar air is 104 mm Hg (d) The partial pressure of carbon dioxide in the alveolar air is 40 mm Hg (e) The partial p r e s s u r e of carbon dioxide in deoxygenated blood is 95 mm Hg. 62. Which one of following statements is false ? (a) Presence of albumin in urine is albuminuria ""BIOLOGY TODAY |APRIL07 , Presence of glucose in urine is glycosuria Presence of ketose sugar in urine is ketonuria Presence of excess urea in blood is uremia P r e s e n c e of h a e m o g l o b i n in u r i n e is haemoglobinuria. 63. Statements A. Plasma constitutes 45% of the human blood B. Albumin is a plasma protein which helps in osmotic balance C. Factors responsible for the blood clotting process are present in the blood D. Plasma without clotting factors is called serum E. Minerals are not generally found in blood Of the above statements (a) only E is wrong and all other 1 to 4 are correct (b) A and B are correct and C, D and E are wrong (c) B and D are correct and A, C and E are wrong (d) A and E are correct and B, C and D are wrong (e) B, C and D are correct and A and E are wrong. 64. The globular protein molecule, which masks the active sites on the F-actin is (a) troponin (b) tropomyosin (c) myosin (d) light meromyosin (e) heavy meromyosin. 65. Choose the correct pathway of the transmission of impulses in the heart beat. (a) AV node - 4 SA node —> Bundle of His —» Purkinje fibres (b) SA node AV node —> Bundle of His - > Purkinje fibres (c) SA node —> Bundle of His —> AV node —> Purkinje fibres (d) AV node Bundle of His SA node Purkinje fibres (e) SA node —» Purkinje fibres —> Bundle of His —> AV node. 66. Find out the correct order of number of bones in the parts of skull such as cranial bone, facial bone, hyoid bone and middle ear bone respectively. (a) 14, 8, 1 and 3 (b) 3, 8, 14 and 1 (c) 14, 8, 3 and 1 (d) 8, 3, 14 and 1 (e) 8, 14, 1 and 3. 67. In an ECG, the depolarization of atria is indicated by (a) P - wave (b) Q - wave (c) R - wave (d) S - wave (e) T - wave. 41 68. Which of the following prevents internal reflection of light within the eye ? (a) cornea (b) choroid (c) sclera (d) conjunctiva (e) ciliary body. 69. The region of the nephron found in the renal medulla is (a) malpighian corpuscle (b) proximal convoluted tubule (c) distal convoluted tubule (d) Henle's loop (e) glomerulus. 70. Which of the following statements are false / true ? A. Calcitonin regulates the metabolism of calcium B. Oxytocin stimulates contraction of uterine muscles during birth C. Grave's disease is caused by malfunctioning of adrenal gland D. ADH stimulates absorption of water and increase the urine production (a) A and C are true; B and D are false (b) A and B are true; C and D are false (c) A and D are false; B and C are true (d) A, B and C are true; D only false (e) A only true; B, C and D are false. 71. Statements A. A-bands of the muscle is dark and contain myosin B. I-bands are the light bands and contain actin C. During muscle contraction the A-band contracts D. The part between the two Z-lines is called as sarcomere E. The central part of thin filament, not overlapped by thick filament is called H-zone. Of the above statements (a) A, B and C are correct while D and E are incorrect (b) A, C, E are correct while B, D are incorrect (c) A and B are correct while C, D and E are incorrect (d) A, B, C and E are correct while D is incorrect (e) A, B and D are correct while C and E are incorrect. 72. Identify the correct sequence of organs/regions in the organization of human ear as an auditory mechanoreceptor organ. (a) P i n n a - C o c h l e a - Tympanic m e m b r a n e Auditory canal - Malleus - Stapes - Incus Auditory nerve 42 (b) Pinna - Tympanic membrane - Auditory canal Incus - Malleus - Stapes - Cochlea - Auditory nerve (c) Pinna - Malleus - Incus - Stapes - Auditory canal - Tympanic membrane - Cochlea - Auditory nerve (d) Pinna - Tympanic membrane - Auditory canal Cochlea - Malleus - Incus - Stapes - Auditory nerve (e) Pinna - Auditory canal - Tympanic membrane Malleus - Incus - Stapes - Cochlea - Auditory nerve. 73. Which of the following animal is having longitudinal binary fission ? (a) Englena (b) Plasmodium (c) Planaria (d) Paramecium (e) Hydra. 74. Find out the wrong statement. (a) Amnion is the outer layer containing amniotic fluid that acts as shock absorber to the soft embryo (b) Yolk-sac is a foetal membrane that helps in the nourishment of the embryo in general (c) In mammals allantois is not excretory in function (d) Chorio-allantoic membrane develops villi and c o n t r i b u t e m u c h to t h e d e v e l o p m e n t of placenta (e) A m n i o n and c h o r i o n d e v e l o p as u p w a r d projecting folds of somatopleure called amniotic folds. 75. Match the items in Column - 1 with - II and choose the correct alternatives Column - I (Animal) A. B. C. D. E. (a) (b) (c) (d) (e) Column - II (Max. Life Span) Carp Cobra Turtle Giant Tortoise Swan A A A A A - 2, 1, 2, 1, 3, B B B B B - 4, 4, 3, 3, 4, 1. 2. 3. 4. 5. C C C C C - 5, 3, 4, 2, 5, D D D D D - 3, 5, 5, 5, 2, 102 years 47 years 152 years 28 years 123 years E E E E E - 1 2 1 4 1. 76. Match the numbers of genes given in Column - I with names of organisms in Column - II and choose the correct alternatives. ""BIOLOGY TODAY |APRIL07,63 Column - I Column - II A. 450 to 700 genes B. 4000 genes 1. Escherichia coli 2. Drosophila * melanogaster C. 13,000 genes 3. Mycoplasma D. 32,000 to 50,000 genes 4. Homo sapiens E. 35,000 to 45,000 genes 5. Oryza saliva (a) A - 2, B - 1, C - 5, D - 3, E — 4 (b) A - 3, B - 1, C - 2, D - 5, E - 4 (c) A - 3, B - 2, C - 1, D - 5, E - 4 (d) A - 2, B - 3, C - 1, D - 5, E - 4 (e) A - 1, B - 3, C - 2, D - 5, E - 4. 77. T h e d i v e r s i t y of t h e h a b i t a t s over the total geographical area is called (a) alpha diversity (b) beta diversity (c) gamma diversity (d) delta diversity (e) omega diversity. 78. The psychological disorder, which is characterized by sadness, hopelessness, low self-esteem, decline in interest, energy, concentration and changes in sleep pattern and appetite is called (a) anxiety disorder (b) obsessive-compulsive disorder (c) attention deficit disorder (d) mood disorder (e) borderline personality disorder. 79. Identify the wrong statements. A. The tumor of haematopoietic cells is called leukemia B. Cancer arising from the epithelial tissues of internal organs and g l a n d s is referred as melanoma C. Sarcoma is a type of cancer where bone and cartilages are involved D. Only benign tumors are called as true cancer or neoplasm (a) A and B only (b) B and C only (c) B and D only (d) A and C only (e) C and D only. 80. Chancroid is a sexually transmitted disease caused by (a) Treponema (b) Haemophilus (c) Nisseria (d) Chlamydia (e) Trichomonas. 81. The function of IgE is (a) mediate in allergic response (b) activation of B-cells ""BIOLOGY TODAY |APRIL07 , (c) protection from inhaled and ingested pathogens (d) stimulation of complement system, passive immunity to foetus (e) present on lymphocyte surface as receptors 82. Select the wrong pair. (a) Haldane (b) Oparin — (c) Fox (d) Spallanzani (e) Francisco Redi - Hot dilute soup Protobiont Coacervates Abiogenesis Biogenesis. 83. When two related populations occupy geographically or spatially separate areas, they are called (a) allopatric population (b) quantum population (c) saltational population (d) parapatric population (e) sympatric population. 84. Which one of the fol lowing groups are not analogous organs ? (a) Wings of birds and wings of butterfly (b) Eye of octopus and eye of mammals (c) Flippers of penguin and flippers of dolphin (d) Thorns ofbougainvillaand tendril of Cucurbita (e) Tuberous root of sweet potato and stem tuber of potato. 85. The radial symmetry is observed in A. Platyhelminthes B. Coelenterates C. Aschelminthes D. Annelids E. Echinoderms (a) B, C and E only (b) A, B, C and E only (c) B, C and A only (d) A, C and E only (e) B and E only. 86. Match the following. Column - I A. B. C. D. E. (a) (b) (c) (d) (e) Column - 11 Euplectella Physalia Pennatula Enlerobius Alytes A A A A A - 5, 5, 4, 3, 2, B B B B B 1. 2. 3. 4. 5. -4, - 3, - 5, -5, - 1, C C C C C - 3, 4, 1, 1, 3, D D D D D -2, - 2, - 2, - 2, - 4, Sea pen Pinworm Venus flower basket Midwife toad Portuguese man of war E- 1 E- 1 E- 3 E-4 E - 5. 87. Which one of the following is not a characteristic 43 feature of the sub phylum vertebrata ? (a) dorsal tubular nerve cord (b) ventral muscular heart (c) presence of notochord in the adult ( d ) p r e s e n c e of k i d n e y s (e) two pairs of lateral appendages, fins or limbs. 88. Which one of the following is correctly paired ? (a) Trygon Monitor (b) Ichthyophis Crow (c) Varanus Stingray (d) Corvus - Limbless amphibian (e) Pristis Sawfish. 89. The excretory organ in cockroach is (a) malpighian corpuscle (b) malpighian tubules (c) hepatic caecae (d) metanephridia (e) green glands. 90. Which one of the following is correctly matched regarding earthworm ? (a) Buccal cavity 1 st to 5th segment (b) Stomach 11th to 12th segment (c) Typhlosole 26th to 95th segment (d) Testes 10th to 14th segment (e) Gizzard 6th to 8th segment. 91. The male cockroach can be identified by the presence of (a) collateral gland (b) green gland (c) broad abdomen (d) anal cercus (e) anal style. 92. In mammals the teeth are (i) of different types (ii) embedded in the cup-like socket of the j a w bones (iii) only two sets, present throughout life These conditions are referred as (a) heterodont, thecodont and diphyodont (b) thecodont, heterodont and diphyodont (c) diphyodont, thecodont and heterodont (d) heterodont, diphyodont and thecodont (e) thecodont, diphyodont and heterodont. 93. T h e t y p e o f t i s s u e l i n i n g t h e n a s a l p a s s a g e , bronchioles and fallopian tubes is (a) columnar ciliated epithelium (b) cuboidal epithelium (c) neurosensory epithelium (d) germinal epithelium (e) stratified columnar epithelium. 94. Find out the wrongly matched pair. 44 skin of frog peritoneum of body cavity bronchioles oesophagus (a) Squamous epithelium (b) Columnar epithelium (c) Ciliated epithelium (d) Stratified cuboidal epithelium (e) Glandular epithelium salivary gland. 95. Chromosome theory of inheritance was proposed by (a) Gregor Mendel (b) Hugo de Vries (c) Bridges (d) Sutton and Bovery (e) Bateson and Punnet. 96. W h i c h o f t h e c h r o m o s o m a l f o r m u l a t i o n is responsible for the expression of meta-male character in Drosophila ? (a) 2A + 3X (b) 3A + 3X (c) 4A + 3X (d) 3A + X Y (e) 2A + XY. 97. The process that involves inter-genic suppression or the masking effect which one gene locus has upon the expression of another is called (a) epistasis (b) dominance (c) incomplete dominance (d) recessive (e) pleiotroDy. 98. Gynaecomastia is a condition seen in (a) D o w n ' s syndrome (b) Turner's syndrome (c) Klinefelter's syndrome (d) Patau's syndrome (e) Edward's syndrome. 99. Cri-du-chat syndrome is caused by (a) para centric inversion (b) duplication (c) translocation (d) deletion (e) pericentric inversion. 100. Match the genetic phenomena with their respective ratios. Column - I A. Inhibitory gene ratio B. Complementary gene ratio C. Recessive epistasis ratio D. Dihybrid test cross ratio E. Dominant epistasis ratio C o l u m n - II 1. 2. 9:3:4 1:1:1:1 3. 12:3:1 4. 13 : 3 5. 9 : 7 (a) A - 5, B - 4, C - 3, D - 2, E - 1 (b) A - 4, B - 5, C - 1, D - 2, E - 3 (c) A - 1, B - 2 , C - 4 , D - 3 , E - 5 ""BIOLOGY TODAY |APRIL07,63 (d) A - 2, B - 1, C - 4, D - 5, E - 3 (e) A - 5, B - 4, C - 1, D - 2, E - 3. 101. In regulation of gene expression in prokaryotes A. L a c t o s e acts as t h e s u p p r e s s o r f o r gene expression B. T r y p t o p h a n acts as t h e i n d u c e r f o r gene expression C. Regulator gene is the one that produces the repressor molecule (a) A alone correct (b) B alone correct (c) C alone correct (d) B and A are correct (e) B and C are correct 102. Match the items in Column - 1 with Column - II and choose the correct alternative. Column - II Column - I A. B. C. D. E. Sickle-cell anaemia Phenylketonuria Cystic fibrosis Huntington's disease Colour blindness 1. 2. 3. 4. 5. 7th chromosome 4th chromosome 11th chromosome X-chromosome 12th chromosome A - 1, B - 3, C - 4 , D - 2 , E - 5 A - 2, B - 3, C - 4, D - 5, E - 1 A - 2 , B - 1, C - 3, D - 5 , E - 4 A - 4, B - 5, C - 3, D - 2 , E - 1 A - 3, B - 5, C - 1, D - 2 , E - 4 . (e: 103. Find out the correct statement. (a) Monosomy and nullisomy are the two types of euploidy (b) Polyploidy is more common in animals than in plants (c) Polyploids occur due to the failure in complete separation of sets of chromosomes (d) 2n-l condition results in trisomy (e) N o n - h o m o l o g o u s chromosomal duplication results in autopolyploidy. (a (b) (c (d) 104. Which of the following is not relevant to the structure of double helical DNA ? (a) The helix makes one complete spiral turn every 34A (b) The diameter of the helix is 20A (c) The distance between adjacent nucleotide is 3.4A (d) Each strand of helix has a backbone made up of alternating ribose sugar and phosphate (e) The two adjacent sugar molecules joined with phosphate by phosphodiester bond. 105. Down's syndrome and Turner's syndrome occur in human beings due to ""BIOLOGY TODAY |APRIL07 , (a) (b) (c) (d) (e) monosomic and nullisomic conditions respectively monosomic and trisomic conditions respectively trisomic and monosomic conditions respectively trisomic and tetrasomic conditions respectively n u l l i s o m i c and m o n o s o m i c c o n d i t i o n s respectively. 106. Which is the initial step in m-RNA maturation process ? (a) polyadenylation (b) 5' capping (c) splicing (d) endonucleolytic cleavage (e) sealing by ligase. 107. Statements A. The four nucleotide bases are not necessarily present in DNA in exact equal proportions B. The total amount of purines are equal to the total amount of pyrimidines C. D N A ligase e n z y m e act to h y d r o l y s e or breakdown a polynucleotide chain into its component nucleotides D. Nuclease enzymes are capable of restoring an intact DNA duplex Of the above statements (a) B is correct but A, C and D are wrong (b) A and B are wrong but C and D are correct (c) A, B and C are correct but D is wrong (d) A and B are correct but C and D are wrong (e) B, C and D are correct but A is wrong. 108. Which of the following group of codons code for amino acid serine ? (a) CUU, CUC, CUA and CUG (b) UAU, UAC, UGU and UGC (c) UCU, UCC, UCA and UCG (d) UGU, UGC, UGA and UAG (e) GUU, GUC, GCU and GCC. 109. Choose the wrong statement in the process of protein synthesis. (a) After uncoiling of DNA molecule, one strand acts as a template for the formation of w-RNA (b) In the presence of DNA polymerase enzyme the OT-RNA is formed based on the triplet codes (c) The m-RNA that leaves nucleus reaches cytoplasm and gets attached with 30S ribosomal subunit (d) The amino acids are transferred from the intracellular amino acid pool to the active ribosomes by the ;-RNA (e) Translation is the process in which proteins are synthesized from the RNA 45 llO.Match the items in Column - 1 with Column - II and choose the correct alternative. Column - I Column - II A. Calcitonin 1. B. Gonadotropin 2. C. Erythropoietin 3. D. Interferon 4. E. Interleukin 5. (a (b) (c (d) (e A-3, A - 3, A -4, A - 2, A -2, B B B B B - 1, 2, 3, 3, 5, C C C C C -4, - 1, -2, - 4. -4, D D D D D - 2, 5 1 5 1, Treatment of viral infections Treatment of rickets Enhancement of immune action Formation of erythrocytes Treatment of infertility E- 5 E-4 E- 5 E- 1 E - 3. 111.Find out the wrong statement. (a) Mobile genetic elements, transposons were visualized by Barbara McCIintock (b) Udder cell, a somatic cell is used to produce the cloned sheep by nuclear transplantation method (c) In pedigree analysis, a person immediately affected by an action is called propositus (d) Dr. Ian Wilmut produced a cloned sheep called Dolly (e) DNA ligases are used to cleave a DNA molecule. 112. The genome of Caenorhabditis elgans consists of (a) 3 billion base pairs and 30,000 genes (b) 180 million base pairs and 13,000 genes (c) 4.7 million base pairs and 4,000 genes (d) 97 million base pairs and 18,000 genes (e) 12 million base pairs and 6,000 genes. 113.Consider the following statements. A. The anti pellagra vitamin is nicotinamide present in milk, yeast, meat and leafy vegetables B. Crypts of Lieberkuhn are present in the liver C. Steapsin is the pancreatic amylase (a) A and B correct (b) B and C correct (c) A and C incorrect (d) A and C correct (e) B and C incorrect. 114.Cod and shark liver oil is a source of (a) energetic nutrients (b) constructive nutrients (c) energetic and constructive nutrients (d) protective nutrients (e) protective and constructive nutrients. 46 115.Find out the correct match Column - I Column - II A. Hepatic lobule 1. B. C. D. E. 2. 3. 4. 5. Brunner's glands Crypts of Lieberkuhn Sphincter of Oddi Cystic duct 6. (a) (b) (c) (d) (e) A - 3, A - 5, A-3, A - 4, A - 4, B B B B B - 6, 2, 1, 6, 2, C - 2, C - 3, C-2, C - 5, C - 6, D D D D D -5, -6, - 5, -2, -5, Sub mucosal glands Base of villi Glisson's capsule Gallbladder Hepato-pancreatic duct Serous glands E E E E E -4 - 1 -4 - 1 - 3. 116.Consider the following statements. A. F l a m e c e l l s are e x c r e t o r y s t r u c t u r e s in flatworms B. G r e e n g l a n d s a r e e x c r e t o r y o r g a n s in annelids C. Columns of Bertini are the conical projections of renal pelvis into renal medulla between the renal pyramids (a) A and B correct (b) B and C incorrect (c) A and C correct (d) A, B and C correct (e) A, B and C incorrect. 117. Find out the correctly matched pair. (a) Pepsinogen - Zymogenic cells (b) HC1 - Globlet cells (c) Mucous - Oxyntic cells (d) Pancreatic juice - Salivary glands (e) Ptyalin - Acinar cells. 118. Vital capacity of the lung includes (a) IRV + TV + ERV (b) ERV + RV (c) ERV + TV (d) IRV + TV (e) RV + ERV + TV + IRV. 119.Consider the following statements. A. In man, vertebral column has 33 bones organized as 28 bones B. Pelvic girdle is made up of two fused bones only C. O s t e o p o r o s i s is characterized by microarchitectural deterioration of the bone. (a) A alone is correct (b) B alone is correct (c) C alone is correct (d) A alone is incorrect (e) B alone is incorrect. 120.Match the items in Column - 1 with Column - II and choose the correct option. ""BIOLOGY TODAY |APRIL07,63 Column - I I Column - I A. Tidal volume B. Inspiratory reserve volume C. Expiratory reserve volume D. Residual volume E. Vital capacity (a) (b) (c) (d) (e) A-3, A - 3, A - 3, A - 5, A - 4, B B B B B -4, - 1, - 1, - 4, - 3, 1. 2500 to 3000 ml of air 2. 1000 ml of air Mil' V f\ 3. 500 ml of air 4. 3400 to 4800 ml of air 5. 1200 ml of air C-2, C - 2, C - 4, C - 2, C - 2, DD DDD - 1, 5, 5, 1, 1, EEEEE- 1. 5 4 4 2 5. 1. (c) 2. (d) (c) 9. (d) 3. (b) 10. (a) 17. (a) 4. (b) 11. (c) 18. ( d ) 25. ( b ) 32. (a) 15. (a) 22. ( b ) 29. (e) 16. (e) 23. (c) 30. (<=) 36. ( e ) 43. (a) 37. ( c ) 44. (a) 38. (c) (e) 39. (e) 46. (a) 50. (e) 57. ( d ) 51. ( d ) 58. (d) 52. ( a ) 59. (e) 53. ( d ) 60. ( b ) 64. (a) 71. (e) 65. (b) 7 2 . (e) 66. (e) 73. (a) 78. ( d ) 85. (e) 92. (a) 79. (c) 80. (b) 67. (a) . 7 4 . (a) 81. (a) 86. (d) 87. (c) (a) 100. ( b ) 94. 99. ( d ) 106.(b) 113.(e) 93. 24. (b) 31. ( b ) 45. 107.(d) (b) 101 • ( c ) 108. ( c ) 114.(d) 115.(c) (b) 12. ( c ) 19. ( b ) 6. (a) 13. (e) 20. ( d ) 7. (d) 14. (d) 21. (c) 26. 27. ( d ) 34. ( b ) 28. (e) 35. (e) 41. ( b ) 48. ( b ) 42. (a) 49. (a) 55. ( d ) 62. (c) 56. (c) 63. (e) 69. ( d ) 76. (b) 70. (b) 77. (c) 5. (c) 33. (e) 40. (e) 47. (a) 54. ( c ) 61. (e) 68. ( b ) 75. (a) 82. ( d ) (d) 89. ( b ) 96. ( d ) 83. (a) 90. (<=) 97. (a) 84. 88. (e) 95. ( d ) 91. (e) 98. (c) 102.(e) 103.(c) 104 • ( d ) 105. ( c ) 109.(b) 110. (e) 112.(d) 116.(b) 117. (a) 111. (e) 118. (a) T h e exa ms 3. 119.(c) BOUND VOLUMES of your Favourite M a g a z i n e s Volumes of the following years are available : Mathematics Today 2006,2005, 2004 Physics For You 2006,2005 Biology Today 2006,2005, 2004,2003,2002,2001 Price of e a c h v o l u m e : R s . 1 7 0 A d d R s . 2 5 (for each volume) for p o s t a g e . How to order: Send money by demand draft/money order. Demand Draft should be drawn in favour of MTG Learning Media (P) Ltd. Mention the volume you require along with your name and address. Mail your order to : Circulation Manager, MTG Learning Media (P) Ltd., 406, Taj Aptt., Ring Road, Near Safdarjung Hospital, New Delhi -29. 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At which stage is the fate of genetic constitution of gametes finally decided ? (a) metaphase - I (b) anaphase - I (c) anaphase - II (d) interkinesis 2. An anticodon of fRNA can recognise more than one codon of raRNA. It is (a) Wobble hypothesis (b) Gene flow hypothesis (c) Template hypothesis (d) Richmond and Lang effect Exam on ,h 17 June 2007 (d) increase in photosynthesis when light of two different wavelengths are provided together. 9. In noncyclic photophosphorylation the pigment molecule first excited is (a) ^680 ( b ) P 7 oo (d) xanthophyll (c) chlorophyll b 10. (a) (c) (d) Both ATP and Mg 2+ are involved in the activity of pyruvic kinase (b) glucokinase phosphogluco isomerase PGA dehydrogenase. 3. A scientist wants to study effect of virus on a plant. Which part he should exclude for inoculation ? (a) shoot apex (b) stem cortex (c) phloem (d) pith 11. In glycolysis during oxidation electrons are removed by (a) ATP (b) GAP (c) NAD + (d) 0 2 4. (a) (b) (c) (d) Azolla is used as biofertilizer because it multiples very fast to produce massive biomass has association of nitrogen fixing Rhizobium has association of nitrogen fixing cyanobacteria has association of mycorrhiza 12. Ovule is inverted with body fused to funicle, micropyle lying close to hilum and facing the placenta. It is (a) hemitropous (b) orthotropous (c) anatropous (d) campylotropous 5. (a) (b) (c) (d) Which one is used in production of alcohol ? Saccharomyces cerevisiae Torulopsis ulilis Clostridium botulinum Leuconostoc citrovonum 6. (a) (b) (c) (d) Species are considered as real basic units of classification lowest units of classification artificial concept of human mind real units of classification devised by taxonomists 7. Plants having (spores), xylem and phloem but lacking seeds/flowers are (a) bryophytes (b) gymnosperms (c) pteridophytes (d) angiosperms 8. Emerson effect is related to (a) decrease in photosynthesis in presence of high light intensity (b) decrease in photosynthesis when lights of two different wavelengths are provided together (c) increase in photosynthesis in presence of monochromatic light 48 13. Nontransfer of pollen from anther to stigma of the same flower due to a mechanical barrier is (a) dichogamy (b) herkogamy (c) heterostyly (d) cleistogamy 14. (a) (b) (c) (d) Industrial melanism is an example of drug resistance darkening of skin due to smoke protective resemblance with the surrounding defensive adaptation against U.V. radiations 15. Fossil evidence indicates that original place for start of human evolution was (a) Java (b) France (c) Africa (d,) China 16. One of the genes present exclusively in the X-chromosome in humans is concerned with (a) baldness (b) red-green colour blindness (c) facial hair or moustaches in males (d) night blindness 17. In silkworm, ifjuvenile hormone is absent at the time of larval moulting, the worm will ""BIOLOGY TODAY | APRIL 07,63 (a) die (c) moult into pupa (b) moult into larval stage (d) moult into adult. 18. Crustacean fishery is connected with exploitation of (a) oysters and crabs (b) mussels and squids (c) shells and cuttle fish (d) lobster and prawn 19. A person has whitish grey coloured stool due to malfunctioning of an organ (a) pancreas (b) liver (c) spleen (d) kidneys. 20. A severe form of jaundice is caused by (a) hepatitis C (b) HIV (c) hepatitis A (d) hepatitis B 21. Extract of fruiting body of Claviceps that yields LSD is called (a) theobromine (b) ergot (c) puffball (d) phytoalexin 22. due (a) (c) Increasing skin cancer and high mutation rate are to acid rain (b) ozone depletion CO pollution (d) C 0 2 pollution 23. In a population, rate of addition of new members is higher than the rate of individuals lost. It shows (a) zero population growth (b) declined growth (c) exponential growth (d) none of these 24. (a) (b) (c) (d) Value of cardiac output is auricular volume x ventricular volume stroke volume x rate of heart beat blood pumped in one minute both (b) and (c) 25. D u r i n g selective reabsorption, most of water is reabsorbed from collecting tubules whose permeability is controlled by (a) oxytocin of posterior pituitary (b) ADH of posterior pituitary (c) vasopressin of anterior pituitary (d) prolactin of anterior pituitary 26. Hypothalamus controls the production of pituitary hormones (a) ACTH (corticotropin), GH (growth hormone) and ADH (vasopressin) (b) FSH and progesterone (c) TSH (thyrotropin) and Cortisol (d) LH (luteinising hormone), ACTH (corticotropin) and TSH (thyrotropin) 27. Velocity of nerve impulse is more in (a) medullated nerve fibres (b) non-medullated nerve fibres ""BIOLOGY TODAY |APRIL07 , (c) equal in both types of nerve fibres (d) none of the above. 28. (a) (b) (c) (d) Ventral root of spinal nerve is composed of somatic motor and visceral sensory fibres somatic sensory and visceral sensory fibres somatic motor and visceral motor fibres somatic sensory and visceral motor fibres 29. Joint permitting rotary movement is (a) hinge joint (b) pivot joint (c) peg and socket joint (d) gliding joint 30. (a) (c) (d) Axis is distinguished from other vertebrae in having odontoid process (b) bifid spine small size small transverse process 31. Elastic tissue which supports testis and is in contact with cauda epididymis is (a) gubernaculum (b) dartos (c) raphe (d) cremaster 32. Primitive endoskeletal structure found in mammalian embyro is (a) vertebral column (b) notochord (c) spinal cord (d) visceral cord. 33. (a) (b) (c) (d) Aquatic photodiffraction produces zones. euphotic, disphotic and aphotic aphotic, euphotic and disphotic euphotic, aphotic and disphotic disphotic, aphotic and euphotic. 34. Competition for light, nutrients and space is most severe between (a) closely related organisms growing in different niches (b) closely related organisms growing in the same area/ niche (c) distantly related organisms growing in the same habitat (d) distantly related organisms growing in different niches 35. (a) (b) (c) (d) Clinostat is the apparatus used to measure the rate of growth in plant measure the quantity of auxin in plant measure the effect of light on plant eliminate the effect of gravity on plant 36. Which of the following physiological effects is caused in plants by gibberellic acid ? (a) shortening of genetically tall plants (b) elongation of genetically dwarf plants (c) rooting in stem cuttings (d) yellowing of young leaves 49 37. Ubisch bodies are connected with the formation of (a) sporopollenin (b) intine and pollenkitt (c) exine (d) pollenkitt and pollinia 38. Essentiality of a mineral is determined by growing plants in (a) soil lacking element (b) soil having only the particular element (c) inert medium having the particular element (d) inert medium having nutrient solution lacking the particular element 39. Which one is against the theory of ascent of sap by Dixon and Jolly ? (a) pores in tracheary elements (b) adhesion force of water molecules (c) cohesion force of water molecules (d) requirement of ATP 40. During absorption of water by roots, the water potential of cell sap is lower than that of (a) pure water and soil solution (b) neither pure water nor soil solution (c) pure water but higher than that of soil solution (d) soil solution but higher than that of pure water 41. Which one has alternate striations and is correctly matched ? (a) biceps under autonomous control (b) iris muscles under control of will (c) heart muscles, involuntary (d) muscles of visceral organs under autonomous control 42. Locomotion in earthworm is directly facilitated by (a) mucus secreted by epidermis (b) segmentation of the body (c) rhythmic contraction of segments (d) setae and contraction of segments 43. the (a) (b) (d) When xylem is surrounded by phloem on all sides, vascular bundle is called amphivasal or leptrocentric bicollateral (c) radial amphicribal or hadrocentric 44. (a) (b) (c) (d) A graminaceous spikelet is surrounded b y two scales called glumes two scales called lemma and pale two scales called lodicules none of the above 45. (a) (b) (c) (d) Lomentum is a fruit characterised by dehiscence from both sutures dehiscence from one suture indehiscent nature constrictions in between the seeds 50 46. (a) (b) (c) An example of gene therapy is production of injectable hepatitis B vaccine production of vaccines in food crop introduction of adenosine deaminase gene in infants afflicted with SCID (d) production of test tube babies through artiifical insemination and implantation. 47. Diameter of DNA is/Wilkin's X-ray diffraction showed DNA diameter to be (a) 200A (b) 100A •(c) 20A (d) 50A 48. The stage following infection by virus when virus particles cannot be observed is (a) infection phase (b) eclipse phase (c) maturation phase (d) lysogenic phase 49. The scientist who created the group protista for both unicellular plants and animals is (a) Haeckel (b) Pasteur (c) Lister (d) Koch 50. (a) (b) (c) (d) A person exposed to cold environment does not show shivering vasoconstriction of peripheral vessels increased secretion of thyroid and adrenal medulla increased heart beat and volume per stroke. 51. Which of the following diseases are due to deficiency of fat soluble vitamins ? 1. cheilosis 2. keratomalacia 3. pellagra 4. rickets 52. Which of the f o l l o w i n g events asociated with fertilization ? 1. capaciation 2. restoration of the diploid number of chromosomes reduced during meiosis 3. activation of ovum 4. formation of body of embryo 53. Which of the following match is/are correct ? 1. luteotropic hormone : stimulates the growth of mammary glands, lactation and maintenance of corpus luteum 2. melatonin : helps in vasoconstriction of blood vessels ""BIOLOGY TODAY|APRIL07,63 adrenocorticoids : regulate Na + level through kidneys, regulate fat, protein and carbohydrate metabolism and decreases K.+ ions vasopressin : causes contraction of uterus at the time of child birth. 3. 4. 54. Which of t h e f o l l o w i n g is correct regarding respiration ? 1. no organism can live without respiration 2. it takes place at every time day and night 3. it involves utilization of carbon dioxide and water 4. during aerobic respiration, ceils produce bioenergy by complete oxidation of glucose into CO and water u s i n g m o l e c u l a r o x y g e n o b t a i n e d f r o m the environment. 55. Which of the following cranial nerves carry impulse from receptor to central nervous system ? 1. trochlear 2. olfactory 3. abducens 4. auditory 56. Terrestrial animals 1. have waxy coating of exoskeleton shells and multiple layer of dead keratinized skin cells to minimise water loss from their surfaces 2. have nervous and hormonal mechanisms to control thirst 3. regulate water and solute by eliminating divalent cations with faeces 4. for example, camel, when water is not available, produce urine and stores uric acid in tissues and solely depend on metabolic water. 57. Blood vessels (excepts capillaries) are made up of three layers, surrounding the central blood carrying canal. These layers are 1. tunica vaginalis 2. tunica intima 3. tunica albugineae 4. tunica adventitia 58. Myogenic heart is present in I. mollusca 2. pisces 3. mammalia 4. annelida 59. 1. 2. 3. Organ specific autoimmune diseases are Hashimoto's thyroiditis rheumatoid arthritis Myasthenia gravis 4. systemic sclerosis 1. 3. cell membrane cell wall 2. 4. nucleolus chloroplast 62. Which of the following statements are correct ? 1. digenic is the condition of sexlinked inheritance in which s e x l i n k e d g e n e s are p r e s e n t on t h e homologous part of X chromosomes and are passed f r o m male parent to m a l e g r a n d s o n t h r o u g h daughters of F, generation 2. diandric is the condition in which 2X chromosomes of f e m a l e ' s behave as if these are completely h o m o l o g o u s and f e m a l e p a s s e s its o n e X chromosome (which might have recieved from female previously) to the male of next generation 3. holandric is the condition of X linked genes in particular those present on non-homologous part of X chromosome and passed on directly from father to son 4. hologenic is the condition of sexlinked inheritance in which a character is directly passed from male to female. 63. Psychotropic drugs are 1. mood altering drugs 2. of four types - sedatives, tranquillizers, stimulants and hallucinogens 3. drugs which depress central nervous system, kill pain, induce drowsiness and sleep 4. non-addicting drugs 64. Thinning of ozone shield is being caused by a number of pollutants like 1. chlorofluorocarbons 2. sulphur dioxide 3. methylchloroform 3. fertilizers 65. Who among the following got the Nobel Prize in 1962 for developing the double helix model of DNA ? 1. Watson 2. Crick 3. Wilkins 4. Franklin 66. 1. 2. 3. 4. Types of fowls with their correct identification are rooster (mature female fowl) cockerel (young male fowl) pullet (young male fowl) layers (female fowls raised for egg production) 60. A cell membrane consisting of aphospholipid bilayer with a single continuous layer of protein molecules on either surface is called as 1. Sandwich model 2. Lamellar theory 3. Danielli and Davson model 4. Robertson model 67. Human immunodeficiency virus (HIV) 1. is a retrovirus having rounded outline 2. causes slim diseases which is characterised by reduction in the number of helper T-lymphocyte 3. can only survive in body fluids like blood,-semen vaginal secretion etc 4. is transmitted through Aedes mosquito 61. Plant and animal cells, both have in common is/are 68. Effects of nicotine on human body include 36 MT BIO LOGY TODAY | MAY 07 51 1. 2. 3. 4. release of adrenaline and hence increased blood pressure and heart beat decreased foetal growth stimulation of nerve impulse and muscle contraction increased foetal growth 69. Trochophore larva is found in 1. porifera 2. annelida 3. coelenterata 4. mollusca 70. Which of the following statement is/are true for Paramecium ? 1. posterior contractile vacuole works more frequently 2. cytophyge or cytoproct is meant for egestion 3. 2 contractile vacuoles work alternately 4. anterior contractile vacuole works more frequently 71. 1. 2. 3. 4. NMR is considered better than CT scan in using ionising radiations not using ionising radiation ability to obtain images in vertical plane only study of tissue metabolism 72. Which of the following layers are collectively called stratum malpighii ? 1. stratum spinosum 2. stratum basale 3. stratum Iucidum 4. stratum granulosum 73. Which of the following hormone are secreted by epithelium of duodenum ? 1. duocrinin 2. enterogastron 3. cholecystokinin 4. gastric inhibitory peptide 74. The stains which generally used for chromosomes are 1. acetocarmine 2. crystal violet 3. sudan III and IV 4. aniline blue 75. 1. 3. 4. Microbodies differ from mitochondria in single membrane 2. absence of DNA direct oxidation present in the cell cytoplasm 76. 1. 2. 3. 4. In Dryopteris sporophyte is parasitic over gametophyte sporophyte is independent gametophyte is dependent on sporophyte gametophyte is independent 77. Selaginella shows 1. heterospory 3. ligulate leaves 2. 4. heterophylly homospory 78. Which of the following conditions are necessary for the growth of the moulds, Mucor or Penicillium ? 52 1. 3. warmth water 2. 4. carbohydrates light 79. 1. 2. 3. 4. Rhodophyceae exhibit the following characters plant body is divided into hold fast, stipe and lamina flask shaped receptive neck called trichogyne reserve food is laminarin and mannitol external fertilization by nonflagellate spermatia 80. Examples of mitotic poisons are 1. azides 2. steroids 3. chalones 4. cytokinin 81. Variations appear during meiosis due to 1. crossing over 2. independent assortment 3. seggregation 4. linkage 82. The diseases that result due to trisomy are 1. Down's syndrome 2. Turners syndrome 3. Patau's syndrome 4. Cri du chat syndrome 83. 1. 2. 3. 4. Restriction endonucleases are capable of creating sticky ends breaking DNA at specific sites causing crossing over breaking DNA at any sites 84. Which of one the following includes total root parasite ? 1. Orobanche 2. Rafflesia 3. Balanophora 4. Cuscula 85. 1. 2. 3. 4. 86. 1. 2. 3. 4. Select the correct matches. interpetiolar stipules - kadam bud scales - banyan pulvinus leaf base -legumes phylloclade - Eichhornia Hypanthodium inflorescence has a flask shaped receptacle has saucer shaped receptacle bears male, female and sterile female flowers consists of involucre of 5 fused bracts 87. In which of the following fruits, is the whole fruit edible ? 1. Carica papaya 2. Capsicum frutescens 3. Musa paradisica 4. Abelmoschus esculentus 3. 4. The diagonastic features of Fabaceae family are fruit legume flowers papilionaceous androecium generally didelphous corolla plicate in bud condition 89. Latex vessels are found in 2. MT BIOLOGY TODAY | JUNE 07 Calotropis 2. Heavea 4. Papaya 90. What is true about heart wood ? 1. it is made up of degenerated cells 2. it does not help in water transport 3. it is also termed alburnum 4. it is soft and undurable 99. The inhibitors of electron transport chain are 1. antimycin A 2. 2-4-dinitrophenol 3. cyanide 4. morphactin 3.. Oleander 100. Tropical evergreen rain forests shows 1. maximum diversity 2. maximum productivity 3. rapid nutrient cycling 4. rainfall of 90 - 10cm 91 From the following equations choose the ones that represent nitrogen fixation. nitrogenase 2 N H ,3 1. N , + 3 H 2, ' 2. 2N03 2NO, N2Os + H 2 0 3. 4. NH+ + 2 0 , 2NO 2HN03 N20 N, N O , + 2 H , 0 + energy 92 Photorespiration is stimulated by 1. high light intensity 2. high oxygen concentration 3. high temperature 4. high C 0 2 concentration 93 1. 2. 3. 4. CAM plants show calvin cycle occurring during night scotoactive stomata release of C 0 2 during night formation of malic acid during dark 94. Which of the following are examples of protocooperation type of biotic interaction ? 1. crocodile bird eats leeches inside th« mouth of crocodile 2. cattle egret feeds on lice of cattle 3. Rhizobium and root of nodulated legumes 4. sea anemone and hermit crab ANSWERS 1. (b) 7. (c) 13.(b) 19. (b) 25. (b) 31. (a) 37. (c) 43.(d) 49. (a) 55. (c) 61.(b) 67. (a) 73.(d) 79. (c) 85. (a) 91.(d) 97. (a) 2. (a) 8. (d) 14. (c) 20. (d) 26. (d) 32. (b) 38. (d) 44. (a) 50. (d) 56. (b) 62. (c) 68. (b) 74.(b) 80.(d) 86.(d) 92. (a) 98. (a) Pomalin. which is effective in increasing apple size combination of cytokinin 2. gibberellin auxin 4. ethylene 97. Given below are few pesticides and their examples. Select the incorrect match from the following. 1. fungicides copper sulphate 2. rodenticides methyl bromide 3. insecticides triazines 4. herbicide carbamates 98. Which of the following terms are associated with tissue culture process ? 1. callus 2. embryoids 3. explant 4. scion MT BIOLOGY TODAY | JUNE 07 4. (c) 10.(b) 16.(b) 22. (b) 28. (c) 34. (b) 40. (a) 46. (c) 52. (a) 58. (a) 64. (a) 70.(b) 76.(c) 82. (d) 88. (a) 94.(b) 100.(a) 5. (a) ll.(c) 17. (c) 23.(c) 29.(b) 35. (d) 41.(c) 47. (c) 53.(d) 59. (d) 65.(a) 71.(c) 77. (a) 83.(b) 89. (c) 95.(c) 6. (a) 12. (c) 18. (d) 24. (d) 30. (a) 36. (b) 42. (d) 48. (b) 54. (a) 60.(a) 66. (c) 72.(b) 78. (a) 84. (a) 90.(b) 96.(b) Wt BHU EXPLORER 95. The nonmetallic minerals that are used as ceramics 1. corundum 2. asbestos 3. fluorspar 4. feldspar 96. is a 1. 3. 3. (a) 9. (a) 15. (c) 21.(b) 27. (a) 33. (a) 39. (d) 45.(d) 51.(c) 57. (c) 63.(b) 69. (c) 75.(a) 81.(b) 87. (c) 93. (c) 99. (d) Available at leading book-shops throughout India. Send D.D/M.O in favour of M T G Books. Add Rs. 35 for postage. vv^e-MTG B O O K S . g*J foil 503. Taj Apt,, Ring Road' Safdarjung Hospital New Delhi - 110 029 Tel,: 26191601, 2619431 Near 53 1. In human pregnancy the urine contains very large amounts of gonadotropic material which is formed in the placenta and is therefore called (a) HCG (b) LH (c) progesterone (d) relaxin. 2. Which one of the following statements concerning the binding of oxygen by haemoglobin is correct ? (a) the Bohr effect results in a lower affinity for oxygen at higher pH values (b) carbon dioxide increases the oxygen affinity of haemoglobin by binding to the amino terminal groups of the polypeptide chains (c) the oxygen affinity of haemoglobin increases as the percent saturation increase (d) oxyhaemoglobin and deoxyhaemoglobin have the same affinity for protons (H+). 8. one (a) (c) When looking at the cross section of the human tissue, finds the red marrow in the medullary cavity (b) cancellous bone periosteum (d) epiphysis. 9. The part of the human brain which is an important relay station for the sensory impulses and also is the origin of many of the involuntary acts of the eye such as the narrowing of the pupil in bright light, is the (a) hypothalamus (b) midbrain (c) corpus callosum (d) cerebellum. 10. two (a) (b) (c) (d) The resting potential of a neuron is dependent on which ions ? lead and calcium ions calcium and phosphate ions sodium and potassium ions potassium and phosphate ions. 3. In the absence of the bile salts, glycocholic and taurocholic acid, the intestinal absorption of all of the following would be impeded except (a) riboflavin (b) oleic acid (c) cholesterol (d) vitamin A. 11. (a) (b) (c) (d) The phase of contraction of muscle occurs when tropomyosin binds and releases actin myosin binds and releases actin actin binds and releases myosin none of the above. 4. Which one of the following is synthesized from an essential amino acid ? (a) tyrosine (b) alanine (c) proline (d) glutamate. 12. The valve between the right ventricle and the pulmonary artery is the (a) mitral valve (b) semilunar valve (c) bicuspid valve (d) tricuspid valve. 5. In which one of the following tissues is glucose transport into the cell enhanced by insulin ? (a) brain (b) lens (c) red blood cells (d) adipose tissue. 13. The primary factor that regulates erythropoietic activity is (a) the kidney (b) erythropoietin (c) oxygen (d) bone marrow. 6. (a) (b) (c) (d) 14. (a) (c) (d) Vitamin K is a water soluble vitamin is synthesized by intestinal bacteria plays an essential role in preventing thrombosis increases the coagulation time in new born infants with haemorrhagic disease. 7. Certain types of granulocytes (white blood cells) in the blood ingest bacteria and debris. This function is most likely to occur by (a) exocytosis (b) passive transport (c) phagocytosis (d) pinocytosis. ANSWERS (3) '£!• (q) Z\ (q)-|4 (o) '01. (q) '6 (e) '8 (0) 54 Cells that bear the CD4 surface antigen participate in HIV infection (b) phagocytosis antigen presentation for immune responses all of the above. 15. First step in activation of ovum during process of fertilization is (a) formation of fertilization membrane (b) fcrtilizin-antifertilizin reaction (c) penetration of sperm in ovum (d) formation of fertilization cone. 7 (q) '9 (P) S (e) (e) X (q) 'SI (0) •I (P) H (B) -l ""BIOLOGY TODAY|APRIL07,63 SOLVED PAPER Karnataka CET 2007 1. In w h i c h of t h e f o l l o w i n g o r g a n i s m s , self fertilization is seen ? (a) fish (b) roundworm (c) earthworm (d) liver fluke 2. Rauwolfia serpentina (a) apocyanaceae (c) liliaceae belongs to family. (b) solanaceae (d) fabaceae (c) 10. the (a) (c) Cowper's gland (d) Bartholian gland When the concentration of the soil solutes is low, absorption of water remains normal (b) is stopped is increased (d) is decreased 11. In the diagram of lenticel identify the parts as A, B, C, D. 3. 4e 2H cyto f fPSlil(P68Cn 4H' + O, ©>—>PS I In the above schematic diagram, which is plastocyanin ? (a) C (b) D (c) A (d) B 4. In ABO blood groups, how many phenotypes are found ? (a) 6 (b) 8 (c) 1 (d) 4 5. The tumor inducing capacity of Agrobacterium tumefaciens is located in large extra-chromosomal plasmids called (a) Ri plasmid (b) lambda phage (c) pBR 322 (d) Ti plasmid 6. If a length of DNA has 45,000 base pairs, how many complete turns will the DNA molecule take ? (a) 4,500 (b) 45,000 (c) 45 (d) 450 7. The process in which mature differentiated cells reverse to meristematic activity to form callus is called (a) dedifferentiation (b) differentiation (c) cyto-differentiation (d) ^differentiation (a) A - phellem, B - p e r i d e r m , C - p h e l l o g e n , - phelloderm (b) A - p h e l l e m , B - c o m p l e m e n t a r y c e l l s , - phelloderm, D - periderm (c) A - c o m p l e m e n t a r y c e l l s , B - p h e l l o g e n , - phelloderm, D - periderm (d) A - c o m p l e m e n t a r y c e l l s , B - p h e l l e m , - periderm, D - phelloderm 12. (a) (b) (c) (d) 13. A. B. C. D. D C C C Sterilization of tissue culture medium is done by autoclaving of medium at 120°C for 15 minutes filtering the medium through fine sieve mixing the medium with antifungal agents keeping the medium at -20°C Match the following. Leishmania donovani p. Malaria Wuchereria bancrofti q. Amoebiasis Trypanosoma gambiense r. Kala azar Entamoeba histolytica s. Sleeping sickness t. Filariasis A - s, B - r, C - q, D - p A - r, B - s, C - t, D - t A - r, B - t, C - s, D - q A - r, B - t, C - q, D - p 8. The lateral roots originate from (a) endoderm cells (b) pericycle cells (c) epiblema (d) cortical cells below root hairs (a) (b) (c) (d) 9. Which accessory genital gland occurs only in mammalian male ? (a) prostate gland (b) perineal gland 14. The idea of Natural Selection as the fundamental process of evolutionary changes was reached (a) By Alfred Russel Wallace in 1901 ""BIOLOGY TODAY |APRIL07 , 69 (b) Independently by Charles Darwin and Alfred Russel Wallace in 1859 (c) Independently by Charles Darwin and Alfred Russel Wallace in 1900 (d) By Charles Darwin in 1866 15. Auxins originates at the tip of the stem and controls growth elsewhere. The movement of auxin is largely (a) basipetal (b) acropetal (c) acropetal and basipetal (d) centropetal 16. Name the class of the Mycota, which is commonly called - 'fungi imperfecta. (a) deuteromycota (b) ascomycota (c) zygomycota (d) basidiomycota 17. Which one is not correct about Krebs' cycle ? (a) it is also called citric acid cycle (b) the intermediate compound which links glycolysis with Krebs' cycle is malic acid (c) it occurs in mitochondria (d) it starts with six carbon compound 18. (a) (b) (c) (d) Which loss of loss of loss of loss of would do maximum harm to a tree ? half of its branches all of its leaves all its bark half of its leaves RA - Right Auricle RV - Right Ventricle LA - Left Auricle LV - Left Ventricle In the above given diagram which blood vessel represents vena cava ? (a) C (b) D (c) A (d) B 20. the (a) (b) (c) (d) Rh ve person donated blood to Rh +ve person for second time. Then, Rh - v e person will die Nothing happens to Rh +ve person Rh +ve blood starts reacting to Rh - v e blood Rh +ve person will die 21. Edaphology is (a) study of elephants (c) study of amphibians (b) study of snakes (d) none of these 22. Pineal gland of human brain secretes melatonin concerned with (a) anger (b) body temperature 70 (c) colouration of skin (d) sleep 23. When a tall plant with round seeds (TTRR) crossed with a dwarf plant with wrinkle seeds (ttrr), the F, generation consists of tall plants with round seeds. What would be the proportion of dwarf plant with wrinkle seeds in F[ generation ? (a) % (b) y16 (c) 0 (d) K 24. (a) (b) (c) (d) Cell wall consists of lignin, hemicellulose, protein and lipid hemicellulose, cellulose, tubulin and lignin lignin, hemicellulose, pectin and lipid lignin, hemicellulose, pectin and cellulose 25. The post anal tail is present in (a) chordates (b) vertebrates (c) invertebrates (d) in all of them 26. The term 'cytoplasm' and 'nucleoplasm' were given by (a) Purkinje (b) Strasburger (c) Brown (d) Flemming 27. Which of the following experiment is called physiological demonstration of osmosis? (a) Thistle funnel - whose mouth is tied with egg membrane (b) Thistle funnel - whose mouth is tied with parchment paper (c) potometer (d) bell jar experiment 28. The net gain of ATP during glycolysis is (a) six (b) eight (c) two (d) four 29. (a) (b) (c) (d) Coronary heart disease is due to Streptococci bacteria inflammation of pericardium weakening of the heart valves insufficient blood supply to the heart muscles 30. Manas sanctuary is located at (a) Rajasthan (b) Assam (c) Bihar (d) Gujarat 31. 03, (a) (c) Checking of reradiating heat by atmospheric dust C 0 2 and water vapours is green house effect (b) solar effect ozone layer effect (d) radioactive effect 32. Mutation can not change (a) RNA (b) environment (c) enzyme (d) DNA 33. Liberation of 0 2 when green cells in water are exposed to sunlight in the presence of suitable acceptor is called (a) Anion's reaction MT BIOLOGY TODAY |APRIL'07 (b) Emerson's enhance effect (c) Blackmann's reaction (d) Hill's reaction 34. Guttation is mainly due to (a) root pressure (b) imbibition (c) osmosis (d) transpiration 35. Statement A : All Metatherian are placental mammals. Statement B : All placental m a m m a l s have menstrual cycle. (a) Statement A is true and statement B is false (b) Statement B is true and statement A is false (c) Both the statements A and B are true (d) Both the statements A and B are false 36. Population density of terrestrial organisms is measured in terms of individual per (a) meter 3 (b) meter 4 (c) meter (d) meter 2 37. N i t r o g e n o u s w a s t e p r o d u c t s are eliminated mainly as (a) urea in tadpole and uric acid in adult frog (b) urea in adult frog and ammonia in tadpole (c) urea in tadpole as well as in adult frog (d) urea in tadpole and ammonia in adult frog 38. In man, the blue eye colour is reces sive to the brown eye colour. If the boy has brown eye and his mother is blue eyed, what would be the phenotype of his father ? (a) black eye (b) brown eye (c) green eye (d) blue eye site due (a) (b) (d) of infection causes redness, swelling, pain and heat to certain chemical, they are histamine and prostaglandins cerumen and mucus (c) histamine and cerumen prostaglandins and cerumen 44. (a) (b) (c) Non-keratinised stratified epithelium occurs in vagina, cervix and buccal cavity vagina, cervix, buccal cavity and anus vagina and cervix (d) buccal cavity and anus 45. Succus entericus is secreted by (a) crypts of Leiberkuhn (b) Brunner's gland (c) both (a) & (b) (d) none of these 46. Synthesis of food in C 4 p a t h w a y occurs in chlorophyll of (a) guard cells (b) bundle sheath (c) spongy mesophyll (d) palisade cells 47. The sequence of structural gene in lac operon concept is (a) lac A, lac Y, lac Z (b) lac A, lac Z, lac Y (c) lac Y, lac Z, lac A (d) lac Z, lac Y, lac A 48. Pericarp and placentae are edible part of simple fleshy berry fruit (a) jack fruit (b) banana (c) tomato (d) date palm 49. In the diagram, which of the following processes are shown in Amoeba ? 39. Munch hypothesis is based on (a) translocation of food due to TP gradient and imbibition force (b) translocation of food due to Turgor Pressure (TP) gradient (c) translocation of food due to imbibition force (d) none of the above 40. Interferons are (a) anti-bacterial protein (b) anti-viral protein (c) complex protein (d) anti-clotting protein 41. The first process by which water enters into the seed coat when a seed is placed in suitable environment for germination is (a) osmosis (b) active transport (c) absorption (d) imbibition 42 is the taxon, which is likely to move into endangered category in near future, if conditions prevail as it is (a) vulnerable (b) endanger (c) rare (d) extinct 43. A localised inflammatory response appears at the ""BIOLOGY TODAY | APRIL 07 , (c) pinocytosis (d) all of these 50. An essential element is that which (a) improve health of the plant (b) is irreplaceable and indispensable for growth of plants (c) is found in plant ash (d) is available in the soil 51. (a) (b) (c) (d) Residual volume is lesser than tidal volume greater than inspiratory volume greater than vital capacity greater than tidal volume 52. Find the odd example. (a) sea lily (b) sea fan 71 (c) sea cucumber (a) A - oviduct, B - uterus, C - outduct, D - 53. W h i c h one is correct ? (d) sea urchin (b) A - c e r v i x , B - u t e r u s , C - ovary, D - (a) blood = p l a s m a + R B C + W B C + blood platelets (c) A - u t e r u s , B - u t e r i n e cavity, C - o v i d u c a l f u n n e l , (b) plasma = blood - (d) A - c e r v i x , B - u t e r i n e cavity, C - f a l l o p i a n t u b e , D - lymphocytes ovary tumor ovary (c) n e u r o n = c y t o n 4- d e n d r i t e + a x o n + s y n a p s e (d) lymph = plasma + R B C + W B C 54. I n t h e g i v e n d i a g r a m n a m e t h e p a r t s A , B, C a n d D. ANSWERS (a) A - g e r m pore, B - G e n e r a t i v e cell, C - intine, D 1. (d) : Self fertilization is fusion of male and female gametes (sex cells) produced by the same individual. Self-fertilization occurs in bisexual organisms, including most flowering plants, numerous protozoans, and many invertebrates. Flukes are hermaphrodites, meaning each worm has both ovaries and testes. Probably cross fertilization is the rule, but self fertilization is certainly a possibility. In any case, it means that every individual is capable of producing fertilized eggs, certainly an advantage in species in which a high reproductive output is required. D - - exine, E - vegetative cell (b) A - germ pore, B - generative cell, C - exine, D - intine, E - v e g e t a t i v e cell (c) A - intine, B - germ pore, D (d) exine, C - generative cell, E - v e g e t a t i v e cell A - e x i n e , B - i n t i n e , C - v e g e t a t i v e cell, D • g e r m p o r e , E - g e n e r a t i v e cell 55. T h e l a r g e s t R B C ' s h a v e b e e n s e e n in (a) elephant (b) whale (c) amphibia (d) man 56. N u c l e i c a c i d o c c u r s in (b) (a) g o l g i b o d y lysosomes (c) (d) mitochondria and chloroplast 57. T h e n u m b e r o f m i t o t i c cell d i v i s i o n r e q u i r e d t o p r o d u c e 2 5 6 c e l l s from s i n g l e c e l l w o u l d b e 12 (c) 6 (a) 10 58. T h e central d o g m a o f p r o t e i n synthesis in teminious (d) 8 is (a) g . R N A —> D N A (b) DNA G-RNA (c) DNA D N A -H> m - R N A (d) m - R N A -> g.RNA 59. In tissue culture roots can b e induced by (a) lower concentration protein protein DNA protein of cytokinin and higher concentration of auxins (b) only cytokinin and n o auxins (c) n o cytokinin and only auxins (d) higher concentration of cytokinin concentration of auxins 60. 4. (d) : ABO system is one of the most important human "blood group systems. The system is based on the presence or absence of antigens A and B on the surface of red blood cells and antibodies against these in blood serum. A person whose blood contains either or both of these antibodies cannot receive a transfusion of blood containing the corresponding antigens as this would cause the red cells to clump. Phenotypes and genotypes of ABO blood groups are - m - R N A —» p r o t e i n m-RNA 2. (a) : Rauwolfia serpentina (Sarpagandha) belongs to family Apocyanaceae. About 30 alkaloids are extracted from roots of this plant, out of which "reserpine" is the most important one having sedative influence and is used in lowering the blood pressure. 3. (b) : The figure denotes non-cyclic photophosphorylations that involves both PS-I (reaction centre-700) and PS-II (reaction centre680). The electrons released from PS II is not cycled back but is transported to PS-I through a series of chemical compounds. Before reaching PS-I, the electrons pass through plastocyanin. cytoplasm (b) ,c ovary and lower Phenotype Genotype A B AB O I A I A or I A i I B I B or I B i jAJB 5. (d) : Agrobacterium tumefaciens is a gram-negative soil bacterium that infects a wide range of plants and causes tumorous growths (galls), especially at the root/stem junction (crown gall). It is of interest because the bacterial cells contain a plasmid, the Ti plasmid (tumour-inducing plasmid), a segment of which is transferred to cells of the plant host. This T-DNA (transfer DNA) segment, which comprises the genes responsible for the tumorous growth, becomes integrated into the genome of infected plant cells. Possession of the Ti plasmid has made A. tumefaciens an important tool in genetic engineering for the introduction of foreign genes into plant tissue. 6. (a) : In each turn of the double helix structure of DNA, there are 10 base pairs each placed at a distance of 3.4 A. Hpnce, if the length of DNA has 45,000 bp, the complete turns of DNA molecule is 4,500. 7. 72 (a) : Dedifferentiation is a phenomenon of reversion of ""BIOLOGY TODAY | JULY 07 differentiated cells or nuclei to n o n - d i f f e r e n t i a t e d ( o f t e n meristematic) cells or nuclei. 8. (b) : In dicotyledonous roots, a well developed pericycle lies below endodermis which gives rise to lateral roots, part of vascular cambium and whole cork cambium. Pericycle functions as the site of lateral root initiation. 9. (c) : A bulbourethral gland (or Cowper's gland) is one of two small exocrine glands present in the reproductive system of human males. They are homologous to Bartholin's glands in females. Bulbourethral glands are located posterior and lateral to the membranous portion of the urethra at the base of the penis, between the two layers of the fascia of the urogenital diaphragm, in the deep perineal pouch. The bulbourethral glands are compound tubuloalveolar glands, each approximately the size of a pea. During sexual arousal each gland produces a clear, viscous secretion known as pre-ejaculate. This fluid helps to lubricate the urethra for spermatozoa to pass through, and to help flush out any residual urine or foreign matter. 10. (c) : When the concentration of the soil solutes is low, the absorption of water is increased. This is due to diffusion of water inside the absorbing cell. This is because water moves from high concentration (of water) to low concentration (of water). So when the soil has less solute the water concentration must be more and thus absorption of water by the cell will be more at the relatively high content of water. 11. (a) : Lenticels are some loosely arranged areas in the periderm. Due to more activity of certain portions of phellogen, the phellem cells are cut off very rapidly and hence these cells are loosely arranged with much intercellular spaces. These loosely arranged cells are called complementary cells and loosely arranged areas in the periderm, are called lenticels. 12. (a) : Sterilization refers to any process that effectively kills or eliminates transmissible agents (such as fungi, bacteria, virus ana prions) from a surface, equipment, foods, medications or biological culture medium. Sterilization can be achieved through application of heat, chemicals, irradiation or filtration. A widely used method for heat sterilization is the autoclave. Autoclaves commonly use steam heated to 121°C (250°F), at 103 kPa (15 psi) above atmospheric pressure. Solid surfaces are effectively sterilized when in this temperature for at least 15 minutes or to 134°C for a minimum of 3 minutes. This method is used in sterilizing tissue culture medium. 13. (c) 14. (b) : Charles Darwin (1809-1882) was an English naturalist. In 1831, Darwin got an opportunity to travel on H.M.S. Beagle (a ship in which Charles Darwin sailed around the world) for a voyage of world exploration. Alfred Russel Wallace (1823-1913), another English naturalist, also travelled widely, and studied the fauna and flora of South America and South East Asia. Evolutionary ideas similar to those of Darwin developed in Wallace's mind. The thinking of both Darwin and Wallace in respect of organic evolution was similar. In 1859, Wallace's paper and a summary of Darwin theory together appeared in the Journal of the proceedings of Linnean Society. Finally in 1859, Darwin published his observations and conclusions under the name "Origin of species by Natural Selection". ""BIOLOGY TODAY |APRIL07 , 15. (a) : History of auxins dates back to Darwin (1886). He took Avena seedling and placed it under a dark chamber with a hole (through which light enters). After sometimes the tip bent towards light (hole). But when the tip was cut, no bending was observed. Therefore, some substances are secreted in tip, due to which bending was there. The substances secreted in the tip are soluble in water (gelatin). The substances secreted in the tip are translocated downwards and caused cell elongation in half portion and hence bending was observed in opposite direction. F.W. Went was the first person to name these substances at tip as auxins. Auxins are the chemical substances which are responsible for elongation of shoot cells. Auxins predominantly show basipetal movement (from shoot apex to base), however, acropetal movement is also seen (from root to shoot). This is called polar transport of auxins. 16. (a) : The class deuteromycetes or deuteromycota is also known as "Fungi imperfecti". It is an artificial group, which lacks the sexual stages. 17. (b) : Krebs cycle is also called as citric acid cycle. It occurs in mitochondria and starts with 6 carbon compounds. The intermediate compound which links glycolysis with Krebs cycle is pyruvic acid. 18. (d) : Loss of half of the leaves of tree provide maximum harm to tree because rate of transpiration slows down and metabolic activity is also lowered but the plants remains alive in stressed condition. 19. (b) : In the given diagram ' D ' represent the vena cava. Vena cava is either of the two large veins that carry deoxygenated blood into the right atrium. 20. (b) 21. (d) : Edaphology is one of the two main branches of soil science, the other being pedology. Edaphology is concerned with the influence of soils on living things, particularly plants. The term is also applied to the study of how soil influences man's overall use of t h e land. G e n e r a l s u b f i e l d s within edaphology are agricultural soil science and environmental soil science. 22. (c) : Melatonin is a hormone derived from serotonin and secreted by the pineal gland and retinas of vertebrates. Melatonin secretion by the pineal is linked to the dark-light cycle of the organism's environment, being greatest at night and lowest by day. The hormone is involved in regulating certain diurnal and seasonal changes in the body, such as the reproductive cycle in seasonally breeding animals. Melatonin also controls pigmentation changes; it triggers aggregation of the pigment melanin into melanophores in the skin, causing the skin to turn pale. 23. (c) Tall plants with round seeds TTRR Dwarf plants with wrinkled seeds ttrr gametes — TtRr — F, generation Tall plant with round seeds 73 Therefore, the proportion of dwarf plants with wrinkled seed is zero. 24. (d) : The major carbohydrates making up the primary cell wall are cellulose, hemicellulose and pectin. The cellulose microfibrils are linked via hemicellulose to form the cellulosehemicellulose network, which is embedded in the pectin matrix. The most common hemicellulose in the primary wall is xyloglucans. The three primary polymers that make up plant cell walls consist of about 35-50% cellulose, 20-35% hemicellulose and 10-25% lignin that fills the spaces in the cell wall between cellulose, hemicellulose and pectin components. 25. ( a ) : All members ofthe phylum Chordata exhibit the following four major morphological features at some stage of their life cycle.These are - notochord, dorsal hollow nerve cord, pharyngeal slits, and post-anal tail. The post-anal tail is a muscular region of the body that extends beyond the anus. In non-chordates the digestive tract usually extends the entire length of the body and the anus is typically positioned at the posterior end of the body (an earthworm is a good example of this type of body plan). The chordate post-anal tail includes skeletal support and musculature that improves the locomotion of many aquatic chordate species. 26. (b) : The term cytoplasm and nucleoplasm were given by Strasburger. Cytoplasm is a gelatinous, semi-transparent fluid that "fills" most cells. Eukaryotic cells contain a nucleus that is kept separate from the cytoplasm by a double membrane layer. The cytoplasm has three major elements; the cytosol, organelles and inclusions. The cytosol is the semi-transparent fluid in which the other cytoplasmic elements are suspended. Cytosol makes up about 80% of the cell and is composed of water, salts, organic molecules, and enzymes that are necessary for the cell to catalyze reactions. The organelles are the metabolic machinery o f t h e cell and are like little organs themselves. The inclusions are chemical substances that store nutrients, secretory products and pigment granules. The cytoplasm is the site where most cellular activities are done. All the functions for cell expansion, growth and replication are carried out in the cytoplasm o f t h e cell.The cytosol has enzymes that takes molecules and breaks them down , so that the individual organelles can use them as they need to. The cytosol also contains the cytoskeleton which gives the cell its shape and can help in the movement of the cell. Similar to the cytoplasm of a cell, the nucleus contains nucleoplasm or nuclear sap. It is enveloped by the nuclear membrane or nuclear envelope. The nucleoplasm is a highly viscous liquid that surrounds the c h r o m o s o m e s and nucleoli. M a n y substances such as nucleotides (necessary for purposes such as the replication of DNA) and enzymes (which direct activities that take place in the nucleus) are dissolved in the nucleoplasm. A network of fibres known as the nuclear matrix can also be found in the nucleoplasm. The nucleoplasm is partly made up of nucleohyaloplasm. 27. (b) : Thistle funnel whose mouth is tied with parchment paper is the physiological experiment of osmosis. Parchment paper is a semipermeable membrane which allows all solvents but no solute to pass through them. 28. (c) : Glycolysis is a metabolic pathway by which a 6-carbon glucose molecule is oxidized to two molecules of pyruvic acid. It is the initial process of most carbohydrate catabolism, and it serves three principal functions: 74 - The generation of high-energy molecules (ATP and NADH) as cellular energy sources as part of anaerobic and aerobic respiration. - Production of pyruvate for the citric acid cycle as part of aerobic respiration. - The production of a variety of six- and three-carbon intermediate compounds, which may be removed at various steps in the process for other cellular purposes. In eukaryotes and prokaryotes, glycolysis takes place within the cytosol of the cell. In plant cells some of the glycolytic reactions are also found in the Calvin-Benson cycle which functions inside the chloroplasts. The net gain of ATP during glycolysis is 2. In glycolysis (i) ATP produced by oxidation at substrate level. Step-6 : 1, 3, diphosphoglycerate to 3, phosphohlyceric acid ( 1 x 2 = 2) Step-9 : Phosphoenol pyruvate to Pyruvate (1 * 2 = 2) Total ATP produced (ii) ATP consumed Step-1 : Glucose to glucose-6-phosphate Step-3 : Fructose 6-phosphate to Fructose 1-6 diphosphate Total ATP consumed Net Gain of ATP (4 ATP - 2 ATP) = 2 ATP 2 ATP 2 ATP 4 ATP 1 ATP 1 ATP 2 ATP 29. (d) : Coronary heart disease is due to insufficient blood supply to the heart muscle. Main function of the coronary arteries is to supply oxygen and nutrients to the heart muscle and remove C 0 2 and other metabolic wastes. But due to narrowing and hardening of these arteries due to accumulation of fatty deposits, lead to clot formation and resulting in the blockage of blood supply to a part of heart. These includes angina pectoris, heart attack and rheumatic heart disease. 30. (b) : Manas Wildlife Sanctuary, situated amidst the gentle slopes at the foothills of the Himalayas in India's northeastern state of Assam, is the only tiger reserve of its kind in the entire northeast. Apart from the rising population of tigers, Manas Wildlife Sanctuary is also the home of the rare golden langur, the hispid hare, the pigmy hog, the one-horned rhinoceros and at least twenty other species of animals and birds that are listed as highly endangered. Manas Wildlife Sanctuary derives its name from the Goddess Manasa. This beautiful Manas Wildlife Sanctuary was previously known as North Kamrup and was declared a sanctuary on October 1, 1928, with parts of it having been notified as reserved forests as early as 1907 and 1927. It was established as the core o f t h e Manas Tiger Reserve from April 1973 and consecutively inscribed on the World Heritage List in 1985 and elevated to the position of a National Park status on September 7, 1990. 31. (a) : C 0 2 has capacity of absorbing heat radiations and thus increases temperature. It does not allow the heat to radiate back to atmosphere. This increase in global temperature (global warming) which is mainly due to C 0 2 concentration is called green house effect. Besides C 0 2 , other important gases associated with green house effect are CH 4 , N 0 2 , CFC, and 0 3 . 32. (b) : Mutation is a sudden random change in the genetic material of a cell that may cause it and all cells derived from it differ in appearance or behaviour from the normal type. So, genetic ""BIOLOGY TODAY | JULY 07 material is DNA in most of the organisms and thus mutation brings in changes in the DNA of chromosomes. RNA and enzyme may also be affected by mutation as they occur inside cell and also RNA is genetic material in some organisms. But mutation does not affect environment. 33. (d) : In Hill's reaction, the experiment performed on Chlorella alga (unicellular green alga) using radioactive isotopes of oxygen, i.e., , 8 0 i.e., when normal H 2 0 and radioactive C 0 2 {i.e., C 1 8 0 2 ) were used, normal 0 2 is evolved. light C 1 8 0, + 2 H , 0 (CH20)+02 t + H20 chlorophyll (normal) C0 2 + 2H 2 , s O light ^ ^ — (CH 2 0) +18 0 2 t + H 2 0 chlorophyll radioactive oxygen ie., when normal C 0 2 and radioactive H 2 0 (H 2 radioactive oxygen ( 1 8 0 2 ) is evolved. ls O) were used, 34. (a) : Guttation occurs when transpiration rate is very low as compared to rate of water absorption. Due to this, root pressure is developed and water is pushed out through specialized pores at vein endings called hydathodes. So, guttation is not due to activity of hydathodes but due to root pressure. 35. (b) : Metatherians are pouched mammals or marsupials. Whereas eutherians are placental mammals with well developed placenta. 36. (d) : Population density is the total population within a geographic entity divided by the number of square miles of land area of that entity measured in square kilometers square meters or square miles. 37. (b) : The main excretory product of frog is urea but excretory product of tadpole larva is ammonia. The urea along with some unnecessary salts and water is collected into the urinary bladder in the form of urine. It will be stored there for some time and is sent out through cloaca. So frog is described as ureotelic animal. 38. (b) : Blue eye colour (bb) is recessive to brown eye colour (BB). The mother is blue eyed (bb) and son is brown eyed (Bb). So, the brown colour gene must come from father who is homozygous brown (BB). The cross will be as follows : bb (mother) BB (father) Son — Brown (homozygous). 39, (b) : The hypothesis proposed by Munch to explain the mechanism of solute transport, demands a turgor pressure gradient for translocation of food leading from the supplying tissue to the receiving tissue. He also suggests that the turgor gradient is chiefly dependent upon an osmotic gradient. 40. (b) ; Interferons are antiviral proteins. Alliac Issacs and Lindeman ( 1 9 5 7 ) gave the term interferons to the chemical substances responsible for viral interference. Interferons are 75" " B I O L O G YTODAY |APRIL07 , proteins molecules or polypeptides of low molecular weight which prevent viral multiplication. 41. (d) : When seed is soaked in water it shows swelling due to imbibition. First step in imbibition is absorption, ie., attachment of liquid on the surface. Imbibition is the first step in germination of seeds, ie., first imbibition occurs by seed coat and then by embryo and other parts. 42. (a) : A vulnerable species is a species which is likely to become endangered unless the circumstances threatening its survival and reproduction improve. There is a very small, non-representative fraction of the 8,565 species listed as vulnerable in the IUCN Red list. 43. (a) : Inflammation is the defence reaction of tissue to injury, infection, or irritation by chemicals or physical agents. Cells in the affected tissue release various substances, including histamine, serotonin, kinins, and prostaglandins. These cause localized dilatation of blood vessels so that fluid leaks out and blood flow is increased. They also attract white blood cells (lymphocytes) to the site. Overall, these responses lead to swelling, redness, heat, and often pain. White blood cells, particularly phagocytes, enter the tissue and an immune response is stimulated. A gradual healing process usually follows. 44. (a) 45. (c) : Secretion of intestinal glands (which occurs as crypts of Leiberkuhn and Brunner's gland) are called succus entericus or intestinal juice. Intestinal juice refers to the clear to pale yellow watery secretions from the glands lining the small intestine walls. Secretion is stimulated by the mechanical pressure of partly digested food in the intestine. Its function is to complete the process begun by pancreatic juice; the enzyme trypsin exists in pancreatic juice in the inactive form trypsinogen, it is activated by the intestinal enterokinase in intestinal juice. Trypsin can then activate other protease enzymes and catalyze the reaction pro-col ipase —> colipase. Colipase is necessary, along with bile salts, to enable lipase function. Intestinal juice also contains hormones, digestive enzymes, mucus, substances to neutralize hydrochloric acid coming from the stomach and erepsin which further digests polypeptides into amino acids, completing protein digestion. 46. (b) : The C 4 plants have a characteristic leaf anatomy called kranz anatomy. Vascular bundles are surrounded by sheath of large parenchymatous cells called bundle sheaths, which are surrounded by mesophyll cells. Bundle sheath chloroplasts are larger in size, lack grana and contain starch grains whereas mesophyll chloroplasts lack starch grains. The calvin cycle or C 0 2 fixation occurs in bundle sheath chloroplast where carbohydrate is formed. The mesophyll chloroplast converts C 0 2 to OAA to malic acid which is transported to bundle sheath for Calvin cycle. 47. (4) : The lac operon is an operon required for the transport and metabolism of lactose in Escherichia coli and some other enteric bacteria. It consists of three adjacent structural genes, a promoter, a terminator, and an operator. The lac operon is regulated by several factors including the availability of glucose and of lactose. Gene regulation of the lac operon was the first genetic regulatory mechanism to be elucidated and is often used as the canonical example of prokaryotic gene regulation. The three structural genes are: lacZ, lacY, and lacA. 63 • lac Z encodes (LacZ), an intracellular enzyme that clcaves the disaccharide lactose into glucose and galactose. • lacY encodes (3-galactoside permease (LacY). a membrane bound transport protein that pumps lactose into the cell. • lacA encodes thiogalactoside transcyclase (LacA), an enzyme that transfers an acetyl group from acetyl-CoA to p-galactosides. Only lacZ and lacY appear to be necessary for lactose catabolism. 48. (c) : Fruit of tomato is called berry, developed from mono or multicarpellary superior or inferior syncarpous ovary with axile or parietal placentation. Pericarp is distinguished into three layers - epicarp forms the skin of fruits. Mesocarp is fleshy and endocarp is hard and stony. Hence, pericarp and placentae are edible part of tomato. 49. (b) : The given figure of Amoeba shows the process of phagocytosis. Amoeba is carnivorous and its mode of nutrition is holozoic, i.e., it feeds by phagocytosis, a mechanism in which the food is engulfed in a solid form. The food consists of flagellates, ciliates and rotifers. Amoeba, even in the absence of special sense organs, is able to select its food. Amoeba captures and engulfs its prey by means of pseudopodia. Pseudopodia arc formed at the points where the food comes in contact with the surface of body. The food vacuole or the gastric vacuole, formed by the extension and joining of the pseudopodia that capture the prey, is comparable to the gut of higher animals. Its membrane will resemble in all respects the plasmalemma. Several such vacuoles, small and large, may be seen in an actively feeding Amoeba. Lysosomes containing digestive enzymes fuse with the food vacuole and the digestion of contained food organism slowly proceeds. It has been demonstrated that the reaction in the food vacuole is first acidic and later on becomes alkaline. This suggests that in the acidic medium, the organism is killed and in the alkaline medium the digestion of starch, proteins and fats takes place by the enzymes amylase, protease and lipase, respectively. As digestion goes on, the food vacuoles shrink and the products of digestion arc diffused into the cytoplasm. The digested food is assimilated to form new protoplasm. 50. (b) : Essential elements are indespensible for growth of plants. Plants are not able to grow normally and hence unable to complete their life cycle in the absence of essential element. It cannot be replaced by other element and it plays direct role in metabolism of plant. 51. (d) : The residual volume is that part o f t h e air in the lung which cannot be exhaled; it represents the remaining volume of lung when forced exhalation of the lung has occurred. It is calculated by subtracting expiratory reserve volume from functional residual capacity. The residual volume is usually 20-25% of total lung capacity. The residual volume increases in difiuse airway obstruction. In this situation there is also an increase in the ratio of residual volume to total lung capacity. The value of residual volume is about 1200 ml. The value of tidal volume is about 500 ml. The value of inspiratory reserve volume is about 3000 ml. The value of vital capacity is about 4600 ml. 52. (b) 53. (a) : Blood is a highly specialized circulating tissue consisting of several types of cells suspended in a fluid medium known as plasma. The cellular constituents are: red blood cells (erythrocytes), which carry respiratory gases and give it its red colour because they contain haemoglobin (an iron-containing protein that binds 76 oxygen in the lungs and transports it to tissues in the body), white blood cells (leucocytes), which fight disease, and platelets (thrombocytes), cell fragments which play an important part in the clotting of the blood. Neurons (also known as neurons and nerve cells) are electrically excitable cells in the nervous system that process and transmit information. Parts of neuron are -soma (body ofthe cell), dendrites (receive messages), and axon (sends messages). Synapses are specialized junctions through which cells of the nervous system signal to one another and to non-neuronal cells such as muscles or glands. Lymph is a pale liquid consisting chiefly of plasma and white blood cells and circulates throughout the lymphatic system, returning to the venous bloodstream through the thoracic duct. Lymph acts to remove bacteria and certain proteins from the tissues, transport fat from the small intestine, and supply mature lymphocytes to the blood. 54. (d) : Pollen grains contain the male gametophyte produced by tneiosis of microspore mother cells that are located along the inner edge of the microsporangia (anther sacs). The outer part of the pollen is exine, which is composed of a complex polysaccharide; sporopollenin. Inner part is intine. The cell contains vegetative cell which develop into the pollen tube and germ pore and generative cell (degenerative) are also present. 55. (c) : All vertebrates except cold-water ice fish transport oxygen via haemoglobin packaged in red blood cells (RBCs). Vertebrate RBCs vary in size by thirtyfold. Differences in RBC size have been known for over a ccntury, but the functional significance of RBC size remains unknown. One hypothesis is that large RBCs are a primitive character. Agnathans have larger RBCs than do mammals. However, the~ largest RBCs are found in urodele amphibians which is inconsistent with the hypothesis that large RBCs are primitive. 56. (d) : A nucleic acid is a complex, high-molecular-weight biochemical macromolecule composed of nucleotide chains that convey genetic information. The most common nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). Nucleic acids are found in all living cells and viruses. Nucleic acids also occur in semiautonomous bodies like mitochondria and chloroplasts. 57. (d) : Mitotic cell division is equatiqnal division where a mother cell divides to form 2 daughter cells. So to produce 256 cells from a single cell, 8 mitotic divisions will occur which can be represented as 1 —» 2 —» 4 —> 8 —> 16 —> 32 —> 64 —> 128 —> 256. 58. (a) 59. (a): Auxins induces new root formation by breaking root apical dominance induced by cytokinins. High concentrations of auxin inhibit root elongation and instead cnhance adventitious root formation. Removal of the root tip can lead to inhibition of secondary root formation. In tissue culture low cytokinin to high auxin ratio induces differentiations of roots. 60. (d) • NEXT AICBSE-PMT on APRIL 6, 2008 T h e Central Board of Secondary Education will hold t h e preliminary r o u n d of t h e next All-India P r e - M e d i c a l / Pre-Dental E n t r a n c e Examination o n April 6, 2008, a n d t h e final examination on May 11, 2008. T h e C B S E h a s b e e n conducting this examination s i n c e 1988. ""BIOLOGY TODAY |APRIL07,63 Q l . T h e following structures are part of the human brain A. medulla oblongata B. floor of mid brain C. thalamus D. cerebral hemispheres E. cerebellum For each of the following functions of the brain, Identify the correct letter of the structure concerned with that function. involuntary breathing movements I. II. accurate voluntary movements in. seat of memory I (a) A (c) A (e) B II 111 C E A D D E I (b) A (d) E II E C f j/C* (b) it adds sweetness to products (c) papain is antibiotic and kills contaminating micro-organisms fd) all of the above (e) none of the above Jr B i o \ (b) (c) III B B Q 2 . 1 n herbivorous mammals, the cellulose of plant cell walls (a) is digested by enzymes produced by symbiotic micro-organisms (b) is digested by cellulase, which is secreted by the lining of the rumen (c) is hydrolysed to simple molecules by large quantities of saliva (d) cannot be digested and therefore forms the bulk of the faeces (e) cannot be digested, but the cell walls are broken down by the mechanical action of the teeth so that the cell contents are released and become available Q 3 . Which of the following effects is brought about bv gibberellins but not by auxins? (a) stimulation of cambial activity (b) stimulation of fruit development (c) inhibition of leaf abscission (d) promotion of phototropic responses (e) breaking of dormancy in leaf buds Q 4 . Papain is a whole dried product obtained from the latex of unripe green papaya fruit. It is used in food industries, confectionery, meat and brewing industries because (a) it contains proteolytic enzyme and other components useful for product manufacture (d) (e) Q 5 . Population genetics can provide insight into all of the o $ i following, except (a) the frequency of a genetic disease in a population how long a disease is likely to persist how rapidly a disease can become established and spread in a population what genes are most likely to mutate and cause disease what disease-associated genes are being selected against in a population ^^ Q 6 . T W O tubes, A and B, containing chloroplasts, 6.5pH buffer, water, and DCPIP are observed for 30 minutes for a colour change. Tube A has changed from blue to clear. Tube B has remained blue. What can you conclude from this experiment? (a) photosynthesis and electron transportation has occurred in Tube A and not in Tube B (b) photosynthesis and electron transportation has occurred in Tube B and not in Tube A light microscope ultracentrifuge 24. Common indicator organism of water pollution is (a) (c) Cholera vibrio Salmonella typhis (b) Entamoeba histolytica (d) Escherichia coli 25. Why is the concentration of ozone less over the north and south poles? (a) CFCs accumulate only in area where the air is cold (b) CFC use is highest in these areas (c) CFCs stick to frozen water vapour and are able to act as catalysts (d) UV rays are stronger in the atmosphere 26. In which of the following cycles does the reservoir of the nutrient exist in material form? (a) carbon cycle (b) phosphorous cycle (c) nitrogen cycle (d) water cycle 27. An important fibre yielding plant is (b) Hevea (a) Cedrus Bambusa (d) Corchorus olitorius (c) Karyopsis is (a) one seeded fruit (c) three seeded fruit 28. (b) two seeded fruit (d) four seeded fruit 29. Viruses enter plant cells only through (a) lenticels (b) wounds (c) stomata (d) roots 30. Honey is (a) acidic (c) neutral (b) basic (d) basic after some days 31. Choose the photosynthetic protozoan from the following (a) Amoeba (b) Plasmodium (c) Paramecium (d) Eugiena 32. The presence of compound eyes is characteristics of the phylum (a) nematoda (b) molluska (c) echinodermata (d) arthropoda 33. The golden age of reptiles is (a) A - 4 , (b) A - 4 , (C) A - 4 , (d) A - 3, i-2, (1) Aristotle (2) Linnaeus (3) Bentham and Hooker (4) Pliny (5) John Ray D- 3 D- 3 D -1 D -1 C-5, I - 2, C - 1 , i-2, C-3, i-2, C-5, 35. Wings of mosquito, bat and bird show evolution called (a) convergent (b) divergent (c) parallel (d) unparallel 36. Which one of the following is not important for evolution? (a) mutation (b) recombination (c) genetic drift (d) somatic variation 37. Which is not a pre-zygotic isolation mechanism? (a) geographical isolation (b) ecological isolation (c) seasonal isolation (d) hybrid sterility 38. An evolutionary process giving rise to new species adapted to new habitats and ways of life is called (a) adaptive radiation (b) atavism (c) (d) genetic drift reversion 39. The principle that gives the geneticists a tool to determine when evolution is occurring is (a) chemiosmotic theory (c) malthusian principle (b) Hardy-Weinberg principle (d) cloning theory 40. Polymorphic cell organelle is (b) lysosome (a) glyoxysome golgi complex (d) peroxisome (c) ANSWER KEY 1. (a) 2. (a) 3. (d) 4. (c) 5. 6. (c) 7. (c) 8. (b) 9. (b) 10. (a) 11. (b) 12. (a) 13. (b) 14. (c) 15. (c) 16. (b) 17. (b) 18. (b) 19. (c) 20. (b) 21. (b) (a) 22. (a) 23. (a) 24. (d) 25. (c) 26. .(b) 27. (d) 28. (a) 29. (b) 30. (a) 31. (d) 32. (d) 33. (d) 34. (d) 35. (a) 36. (d) 37. (d) 38. (a) 39. (b) 40. (b) MTBIOLOGY TODAY |APRIL73 '07 Senius ST All students preparing for PMT examinations can participate in Bio-Genius Contest. Answers marked only on the entry form of the magazine / photocopy of form will be accepted. More than one response to a question will be disqualified. Prizes • 1st Prize - LG Mobile phone • 2nd Prize - Adidas Bag • 3rd Prize - MTG Books (worth Rs. 500/-) The entries with maximum number of correct answers for three consecutive months (May '08 - July '08) will be awarded 1st prize. 2nd and 3rd prize will be given to the next maximum scorers. In case of a tie, the winners will be decided through a lucky draw. The decision of the editor will be final and binding in all cases and will not be a matter for consideration of any court and no correspondence will be entertained. Name and photograph of the prize winners of this contest will be published in the September issue. MTG is not responsible for any postal delays, transit losses or mutilation of entries. Last Date The entries should reach on/before 30"1 June '08 to Wfcfc© - Bio-Genius Contest, 406, Taj Apartment, Ring Road, Near Safdarjung Hospital, New Delhi-29. [Note : Enclosures should include a passport size photograph and a photocopy of age proof.] Which of the following statements is not true? (a) lactic acid & citric acids formed during the growth of Lactobacilli & Aspergillus niger are antibiotics as they inhibit the growth of other micro-organisms. (b) natural penicillins cannot resist the action of gastric juice. (c) the term antibiotic was used for the first time by Selman Waksman in 1942. (d) tetracycline is obtained from Streptomyces auerofaciens. 2. Which of the following is in offing with great potentials in home and foreign markets for aquaculture? (a) aqua revolution (b) blue revolution (c) pisci revolution (d) marine revolution 3. Which of the following is prepared from material left over after extracting oil from fish? (a) cattle feed (b) fish manure (c) fish guano (d) isinglass. 4. Which of the following varieties of fish has not been imported and cultured in India? (a) Tinea tinea (b) Cyprinus carpio (c) Carassius carassius (d) Chanos chanos 131 wr BIOLOGY TODAY |JULY07 After the expulsion of calf the uterus tends to throw out the placental membranes (after birth). The expulsion of after birth is likely to occur within. (a) 20 - 24 hours after calving (b) 4 - 6 hours after calving (c) 8 - 1 2 hours after calving (d) 16 - 20 hours after calving. Which of the following diseases of cattle is characterized by inflammation of udder ? (a) mastitis (b) black quarter (c) tympanitis (d) schistosomiasis 7. At Indian Veterinary Research Institute, Izatnagar which of the following processes was first of all introduced? (a) super-ovulation (b) embryo transplantation (c) artificial insemination (d) controlled breeding. The difference between outbreeding and inbreeding in cattle is that (a) inbreeding opens out maximum chances of the expression of recessive characters while outbreeding provides heterozygosity and greater variation. (b) outbreeding results in pure line selection, while con- tinued inbreeding leads to inbreeding depression. Inbreeding increases homozygosity while outbreeding exposes harmful recessive genes that are eliminated by selection. (d) Inbreeding is done between unrelated animals for 4 - 6 generations, while outbreeding is done between related individuals for 4 - 6 generations. (c) Pick out the correct match from the codes given below. Column I Column II (A) Cow (i) Kashmiri Pashmina (B) Buffalo (ii) Lohi (C) Sheep (iii) Murrah (D) Goat (iv) Tilapia (v) Dangi (a) (b) (c) (d) (A) (v) (iii) (v) (iii) (B) (iii) (v) (iii) (v) (C) (i) (i) (ii) (ii) (D) (ii) (ii) (i) (i) A drug prepared from the bodies of honey bees is used in the treatment of (a) arthritis (b) malaria (c) dysentery (d) diptheria Which of the following statements is not true? (a) pebrine is a severe hereditary disease of silkworms caused by Nosema bombycis. (b) larvivorous fish such as Gambusia, Panchax, Trichogastereat tadpole larva. (c) angora is an exotic breed of goat that originated in turkey. (d) single comb white leghorn is the most common eggtype variety used for commercial production. Which of the following are two core techniques that have enabled birth of modern biotechnology? (a) genetic engineering and maintenance of sterile medium (b) restriction enzymes and PCR (c) development of techniques and plasmids (d) genetic engineering and PCR. Treatment of haemophilia A is done by which of the following recombinant proteins ? (a) blood clotting factor IX (b) hirudin (c) blood clotting factor VIII (d) tissue plasminogen activator In Glucometer, the strip contains an immobilised enzyme glucose oxidase, which when oxidised by glucose of blood releases electrons. These electrons are converted into electric current which is (a) inversely proportional to the amount of sugar in blood (b) almost equal to the amount of sugar in blood (c) square of the amount of sugar in blood (d) directly proportional to the amount of sugar in blood. Which of the following sequences is most likely to be a restriction enzyme recognition site? (a) CGGC (b) CGC (b) GTAATG (d) GTCGAC DNA from a eukaryotic organism is digested with a restriction endonuclease and the resulting fragments cloned in a plasmid vector. Bacteria transformed by these plasmids collectively contain all of the genes of the organism. This culture of bacteria is referred to as a (a) restriction map (b) F' factor (c) RFLP profile (d) library Which of the following is not a sequence data bank? (a) gene bank (b) DNA data bank of Japan (c) swiss-PROT (d) protein data bank. Sodium dodecyl sulphate (SDS) is used while separating proteins by polyacrylamide gel electrophoresis because (a) it helps in solubilization of proteins thereby making it easier to separate. (b) it binds to proteins and confers uniform negative charge density thereby making them move during electrophoresis. (c) decrease the surface tension of buffer used for electrophoresis. (d) stabilizes the protein. The first pet cat that was cloned at a cost of $5000 by an American company was named (a) Little Nicky (b) Little Pusy (c) Little Johny (d) Little Tommy Which of the following is often referred as suicide gene? (a) gene encoding thymidine kinase (b) gene encoding adenosine deaminase (c) gene encoding glucocerebrosidase (d) gene encoding argino succinate synthetase. The DNA markers used in the diagnosis of diseases and DNA finger printing is / are (a) restriction fragment length polymorphism 132 B I O L O G Y TODAY JUNE 08 (b) minisatellites and microsatellites (c) single nucleotide polymorphism (d) all of the above 22. Given below are the statements related to the history and development of genetic engineering. Pick out the correct one. (a) Paul Berg got Nobel Prize in medicine or physiology for discovery of restriction endonuclease (b) Collins and Hohn developed a method for obtaining recombinant plasmids packed into phage and then transduced into £ coli. (c) W. Arber - Father of genetic engineering transferred gene of SV 40 virus into E. coli. (d) Boyer, Chang and Cohen considered the first artificial cloning vector pBR 322. 23. During the process of Southern blotting the apparatus is arranged bottom to upwards in which of the following sequence. (a) glass support plate -»filter paper wick gel - » nitrocellulose membrane —> filter paper - > paper tissue. (b) filter paper wick glass support plate gel —> nitrocellulose membrane - » filter paper —> paper tissue. (c) glass support plate - > filter paper wick - » nitrocellulose membrane gel —> filter paper —> paper tissue. (d) glass support plate filter paper wick —> gel nitrocelluslose membrane —> paper tissue filter paper. 24. The most recent and modern method for the diagnosis of malaria is (a) by using a DNA probe (b) by microscopic examination of blood smears (c) by detection of antibodies in the circulation (d) by polymerase chain reaction. 25. The original technique for the production of recombinant insulin has undergone several changes, for improving the yield. Select the changes which has not been done. (a) addition of signal peptide (b) synthesis of A & B chains separately (c) inserting human insulin gene and the promoter gene on to the plasmids of E. coli (d) none of the above. 26. First non bio-degradable lipophilic pesticide used commercially is (a) dichloro diphenyl trichloroethane (b) aldrin (c) benzene hexachloride (d) endosulphan 76 B I O L O G Y TODAY|DECEMBER'08 27. The phenotypic superiority of the hybrid over either of its parents in one or more traits is called (a) heterosis (b) inbreeding depression (c) hybridization (d) micropropagation 28. Somatic hybrid in plants were first obtained between two species of (a) tobacco (b) Brassica (c) Petunia (d) Soianuni 29. Dried roots, leaves and tops of Atropa accuminata yield three drugs (a) atropine, aconite, belladona (b) atropine, adhatoda, scopolamine (c) scopolamine, belladona, atropine (d) atropine, hyoscamine, scopolamine 30. A beetle which attacks sunflower and suppresses Parthenium hysterophorus effectively is (a) Nupserha lenita (b) Zygogramma bicolorata (c) Radiola cardinalis (d) Cyrtorhinus mundulus 31. A famous Mexican plant breeder who was awarded nobel peace prize for developing high yielding wheat varieties is (a) N. I. Vavilov (b) K. Ramiah (c) T. S. Venkatraman (d) N. E. Borlaug 32. Amber grain coloured variety of wheat produced by Dr. M. S. Swaminathan by gamma ray treatment of dwarf wheat varieties and responsible for green revolution in India is (a) Sonara - 64 (b) Sharbati Sonara (c) Remei (d) Lerma Rojo - 64 33. Match column I and II and select the correct answer using the codes given below Column I Column II (A) Baker's yeast (i) Streptococcus (B) Food yeast (ii) Leuconostoc mesenteroides (C) Dextran (iii) Saccharomyces sp (D) Butter milk (iv) Streptococcus lactis Torulopsis utilis (v) (A) (a) (iii) (b) (iv) (c) (iii) (d) (iv) (B) 0) (v) (v) (i) (C) (ii) (i) (ii) (ii) cremoris (D) (iv) (iii) (iv) (v) 34. In the given figure, name the enzyme A' involved in carrying out this action %imiriTTHTTfnT! 3 ' 3'UIIIIIIHIIIIIIIIIIII 5 ' 5 ® " nrmTr ' Turrni 3 3 'iimniiiiiiiiiiiiiii 5 ' (a) endonuclease (c) DNA polymerase (b) (d) (d) technique of separation and purification of gene products. exonuclease all of these Which of the following statements is false in case of PCR? (a) it is a valuable tool in locating genetic basis of disease. (b) this cannot be used for detecting the presence of gene sequences ofthe infectious agent (c) it results in selective amplication of a specific region of DNA molecules (d) none of the above. 38. Match column I and II and find out the correct answer using the code below : Which one of the following is not a palindromic sequences? (a) MALAYALAM (b) ANDMAMDNA (c) CATATAC (d) DALTLATLD 37 Gel electrophoresis is a (a) technique of separation of charged molecules under the influence of magnetic field, (b) technique of incorporation of DNA molecules into the cell through transient pore made due to electrical impulses. technique of separation and isolation of DNA fragments (c) through the pores of agarose Column II (organism) Column 1 (Enzyme) (A) Pectinase (i) Candida lipolytica (B) Lipases (ii) Torula cremaris (C) Proteases (iii) Byssochalmys fulvo (D) Lactases (iv) Mortierella renispora (a) (b) (c) (d) (A) (i) (iii) (iv) (iii) (B) (iii) (i) (i) (ii) (C) (iv) (iv) (ii) (i) (D) (ii) (ii) (iii) (iv) 39. Biogas generation is a three stage anaerobic digestion of animal and other organic wastes. Find out the correct sequence of the micro-organisms used. (a) facultative anaerobes fermentative microbes methanogenic bacteria (b) methanogenic bacteria —> decomposer microbes fermentative microbes PRIZE W I N N E R S witG- Bio-Genius Contest-3 r 1 s t Prize Sujoy Kabiraj 5/57, Netaji Nagar, Kolkata, West Bengal -700040 2 n d Prize 3 rd Prize Soumi Sanyal Muchipara Ramrajatala, Howrah, West Bengal-711112 Disharee Das 181/2F, Raja Apartments, Raja Ram Mohan Roy Road, Kolkata, West Bengal - 700041 O t h e r Highly C o m m e n d a b l e C o n t e s t a n t s j • Soumesh Roy (Arunachal Pradesh) • Ram Krishna Mishra (UP.) • Iram Shafi Akhoon (Kashmir) • Dipanjan Mukherjee (West Bengal) • Ashiq Hussain Bhat (Kashmir) "Heartiest Congratulations and Best Wishes for bright future to all winners!' Prizes are being sent. B I O L O G Y TODAY I JUNE 08 (c) facultative anaerobes —> methanogenic bacteria —> fermentative microbes. (d) fermentative microbes facultative anaerobes - > methanogenic bacteria 40. Find out the correct combination (a) (b) (c) (d) citrus canker - Pseudomonas nibrilineans late blight of potato - Mycosphaerella racici root knot of brinjal - Meloidogyne incognita ear cockier - Dactylelia ovipara sitica 41. The given figure shows the separation of protoplast from a cell. What does 'X' represent in it? Nucleus Cell wall / vacuole Plasmalemma Plant cell (a) (b) (c) (d) Protoplast pectinase and amylase cellulase and lipase cellulase and protease pectinase and cellulase Below are given few steps of genetic engineering. (i) Isolation of DNA segment (ii) Cloning the DNA (iii) Transferring of DNA segment from one organisms to other • 2900+ Chapterwise new A & R question with detailed solutions • 400+ figures, diagrams, tables and flow charts • AIIMS 9 year's A & R questions • Analysis of 9 year's AIIMS A & R questions BIOLOGY TODAY JUNE 0 Which of the following represents the right sequence of the phenomenon ? (a) (i), (ii), (iii) (b) (i), (iii), (ii) (c) (ii), (iii), (i) (d) (iii),(i),(ii) Mycoherbicides are fungi which parasitise specific plants. Which of the following statements describe about such mycoherbicides? (a) devine and Collego are fungal spores spread over weeds. (b) Phytophthora paimivora does not allow milkweed vine to grow in Citrus orchards. (c) palmivoralt was produced in 1981. (d) all of the above. 44, A suspension culture consists of single cell and small groups of cells suspended in a liquid medium. Usually the medium contains (a) agar (b) auxin 2, 4 - D (c) BAP (d) NAA Biofortification is (a) breeding of crops with higher levels of vitamins and minerals (b) the most practical aspect to improve the health of the people. (c) breeding of crops with higher protein and healthier fats (d) all of the above. WXfcGr SSERTION & REASON PHYSICS CHEMISTRY BIOLOGY In biogas production most methanogenic bacteria are active when water content is maintained at (a) 90% (b) 1 0 - 1 5 % (c) 50% (d) 130% A toxin is produced by bacteria which is highly effective against different groups of insects like moths, flies, beetles etc. It does not cause any adverse environmental pollution. The toxin is (a) rotenones (c) ecdysone (c) thurioside (d) pyrethrum Wood which is used as a source of energy is called fuel wood. Some trees provide good fire wood and some are bad fire woods. Which among the following is a bad fire wood source? (a) Prosopis (b) Michelia (c) Adina cordifoiia (d) Casuarina 49. Which of the following is related with bolutism ? (a) occurs in cattle, sheep, horses etc and can be transmitted to humans (b) failure of muscle contraction leading to paralysis (c) occurs due to inhalation of 2500 spores (d) nausea, appetite loss, intestinal cramping etc is caused. 50. Dolly - the first mammal cloned by Wilmut and Campbell in 1997 died few years ago. Which of the following statements is true? (a) its death was natural without any complications (b) its death was natural due to complications (c) it was killed due to the complications arising in it (d) none of the above. Cut and send to: BIO-GENIUS Contest-4 WfcfcG- Bio-Genius Contest, 406, Taj Apartment, Ring Road, Near Safdarjung Hospital, New Delhi-110 029. (The last date of receipt of Answer Sheets is 30th June '08) Name (Mr./Miss) Age Correspondence address.. . Pin Phone (with STD code) . % in 10th & year of passing e-mail / Mobile • • No. of questions attempted . Class No. of questions unattempted . School's Name & Address Name of Coaching Institute you are attending 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. ® ® ® ® ® ® ® ® ® ® © © © ® ® ® ® ® ® ® © © © © © © © © © © ® ® ® ® © © © © © © 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. ® ® ® ® ® ® ® ® ® ® © © © © © © © © © © © © © © © © © © © © ® ® ® © ® © © © © © 21. ® 22. ® 2 3 . ® 24. ® 25. ® 26. ® 2 7 . ® 28, ® 29. ® 30. ® © © © © © © © © © © © © © © © © © © © © ® ® ® ® ® © ® © ® @ 31. GD 3 2 . ( ID 3 3 . Q.D 3 4 . Q.D 35. dD 36. ( ID 37. dD 38. (£D 39. (£D 40. QD © © © © © © © © © © © © © © © © © © © © © 41. ® 42. ® 43. © 44. ® 45. ® 46. ® 47. ® 48. © 49. © 50. ® ® ® ® ® ® ® ® ® ® © © © © © © © © © © © © © © © © © © © © Answer sheet other than the one printed here will not be accepted. The answer sheet may be photocopied. Mark your Answers with blue/black ball point pen. B I O L O G Y TODAY JUNE 08 136 © © © © © © © © © ® if Solved Paper 2008 ORISSA JEE Which of the following is essential for chlorophyll synthesis ? (a) Mn (b) Mg (c) Cu (d) Fe. HSK pathway is also called as (a) C2 cycle (b) C3 cycle (c) C4 cycle 3 (a) (b) (c) (d) (d) none of these Root pressure is higher when transpiration is very low and absorption is low transpiration is very high and absorption is very high transpiration is low and absorption is low transpiration is high and absorption is low. Which ofthe following shows triploid nature in flowering plants ? (a) megaspore (b) microspore (c) embryo ' (d) endosperm. Masses of pollen grains i.e., pollinia is found in (a) orchidaceae (b) solanaceae (c) malvaceae (d) gramineae. Bacteria protect themselves from viruses by fragmenting viral DNA upon entry with (a) exonudease (b) endonuclease (c) gyrase (d) ligase. The technique of production of monoclonal antibodies was developed by (a) Fredrich and Meischer (b) Bentham and Hooker (c) Milstein and Kohier (d) Watson and Crick. The secondary metabolite vinblastin is obtained from (a) Catharanthus roseus (b) Hibiscus rosasinensis (c) Aliumcepa (d) Riccia fluitans. The sequence in m-RNA transcribed from a piece of DNA having a sequence ATTGCATCT is (a) TAAATGGCC (b) UAACGUAGA (c) TAACGTAGA (d) AATTGCAGA. When stomata closes which of the following events does not occur? (a) guard cell become flaccid (b) sugar is converted to starch (c) O.P of the guard cell decreases (d) accumulation of 0 2 takes place Which of the following antibiotic is active against fungus? (a) .streptomycin (b) polyenes (c) tetracycline (d) neomycin. Which of the following is maintained for optimum production of vinegar ? (a) anaerobic condition (b) temperature of 65°C (c) aerobic condition (d) microaerophilic condition. the (a) (b) (c) (d) During lytic life cycle of a virulent DNA phage which of following does not occur? host cell produce large number of virions the host cell lyse new phages are released the phage DNA integrated into the host chromosomes. Which of the following movement of plant occurs in response to shock stimulus? (a) nyctinasty (b) thigmonasty (c) seismonasty (d) hyponasty. In plant biotechnology, root tumours are induced in plant using the bacterium (a) Agrobacterium rhizogenes (b) Agrobacterium basilis (c) Rhizobium (d) none of these. The phenomenon of plasmolysis is evident when cells are kept in (a) hypotonic solution (b) hypertonic solution (c) isotonic solution (d) none. The details of tricarboxylic acid path was worked out by (a) Meischer (b) Hans Krebs (c) Pasteur (d) none of these. Which of the following is widely used as a successful biofertiliser in Indian rice field ? (a) Rhizobium (b) Acacia arabica (c) Acaiypha indica (d) Azolla pinnata The plant of this group are adapted to live partly in water and partly above substratum and free from water, (a) xerophytes (b) thalophytes (c) helophytes (d) hydrophytes, In protoplast fusion the enzymes required (a) cellulase, hemiceliulase, pectinase (b) pectinase (c) ligase, hemiceliulase (d) hemiceliulase. Lysosome, the suicidal bags were first observed by (a) Hooke (b) Golgi (c) de Duve (d) none of these. Bryophytes have probably evolved from (a) blue green algae (b) green algae (c) blue algae (d) red algae. 56 B I O L O G Y TODAY|DECEMBER'08 Shoot apical meristem is found on the tip of (a) plumule (b) radicle (c) root (d) apex. (a) (b) (c) (d) Deuteromycetes are called imperfect fungi due to lack of cell wall lack of sexual reproduction lack of asexual reproduction lack of vacuoles. Single flower with multiple ovaries is called (a) composite fruit (b) simple fruit (c) aggregate fruit (d) none of these. Bright coloured fleshy fruits are dispersed by (a) insect (b) air (c) water (d) bird. Mycoplasma is not inhibited by penicillin as it lacks (a) cell wall (b) sexual reproduction (c) ribosomes (d) nucleus. Group of algae in which sexual reproduction is absent (a) cyanophceae (b) bacillariophyceae (c) chlorophyceae (d) none of these. Which one represents a mutualistic association of a fungus with the root of higher plant? (a) mycorrhiza (b) mycoplasma (c) lichen (d) myxomycetes. (a) (b) (c) (d) On the basis of r-RNA genes bacteria are divided into Gram + ve and Gram - ve bacteria and archaebacteria actinomycetes and mycoplasma cyanobacteria and mycoplasma. (a) (b) (c) (d) Which of the following is correct in plant cell? bigger vacuole with rigid cell wall centriole take part in cell division centrosome are inactive in non-dividing ceil absence of cell membrane. 3 Cactaceae stores water in leaves. It implies (a) ephemerals (b) drought resistants (c) annuals (d) non succulents. In meiosis the chromosome replicate during (b) metaphase (a) prophase (d) interphase. (0 anaphase Closed vascular bundles are characterized by (b) absence of cambium (a) presence of cambium (d) none of these. (c) both Sunken stomata found in (a) xerophyte (c) mesophyte Sphaerosomes contain » cellulose reserve (c) lipid reserve (b) hydrophyte (d) halophyte (b) protein reserve (d) both protein and lipid. Saccharum officinarum grows well in (a) low temperature (b) swampy area ; (c) dry and arid condition (d) moist condition. j In stems of dicots, vascular cambium arises from • (a) procambium (b) cambium I (c) promeristem (d) protoderm. Genetic information in a DNA molecule is coded in the I (a) no of bases (b) sequence of nucleotides I (c) length of DNA (d) number of nucleosides. Parenchymatous cells filling the space between dermal ; and vascular tissue is (a), ground tissue (b) epidermal tissue ; (c) pith (d) vascular bundles. | Guard cell regulates (a) respiration ; (c) photosynthesis (b) transpiration (d) photorespiration. Most of the cell membranes are principally composed of : (a) protein (b) lipid (c) . protein and lipid (d) cellulose. Pneumatophores are characteristic features of (a) halophytes (b) xerophytes (c) hydrophytes (d) thalophytes. Which is not an adaptive features in plants growing in physiological dry soil? (a) pneumatophore (b) vivivary (c) sunken stomata | (d) conducting tissues rudimentary. Short twisted strands of hyphae which serves as anchors : for lichens j (a) mycelium (b) rhizines (c) roots (d) rhizoids. The plant in which Hugo de Vries introduced the concept of mutation ; (a) Oenothera tamarkiana (b) Pisum sativum ; (c) Allium cepa (d) Mirabilis jalapa. 1 A virus containing ssRNA act as a template for DNA • synthesis is called as : (a) polio virus . (b) retro virus •: (c) poxvirus (d) adenovirus. Which of the following is living fossil? i (a) Abies (b) Ginkgo biloba ; (c) Ephedra (d) Taxus. Basidiospores are borne on the tip of ; (a) mycelium (b) ascocarp : (c) flagella (d) aplanospore. Which of the following is more essential for the breaking of seed dormancy ? ; (a) Light (b) Heat (c) Cold (d) moisture. The phenomenon of sulphur shower in pine forest is due : to B I O L O G Y TODAY JUNE 08 57 (a) presence of sulphur (b) presence of insects (c) release of pollen grains in prodigious amount (d) large number of fruits Cereals during germination derive their food from (a) starch (b) soil (c) aleurone grains (d) embryo. (a) (b) (c) (d) The polymerase chain reaction is "a technique that is used for in vivo replication of DNA is used for in vivo synthesis of mRNA is used for in vitro synthesis of mRNA used for in vitro replication of specific DNA sequence using thermostable DNA polymerase. Leaf mesophyiis are composed of (a) pallisade parenchyma (b) spongy parenchyma (c) both of them (d) none of these. 55. There is no division of cytoplasm after mitosis then the condition will be (a) one cell one nuclei (b) one cell with two nuclei (c) only one cell (d) one cell without nucleus. Which of the following antibiotic inhibits cell wall biosynthesis in actively dividing bacterial colonies? (a) ciavicin (b) penicillin (c) ergotine (d) none of these. 5? In angiospermic bud condition floral bud is covered by whorls of (a) petal (b) sepal (c) anther (d) stigma. ' Helically coiled shaped bacteria are called (a) spirilla (b) cocci (c) bacilli (d) vibrio. Protein denaturation takes place by the activity of (a) water (b) heat (c) enzyme (d) pressure. Site of gluconeogenesis is (a) mitochondria (b) golgi bodies (c) glyoxysomes (d) none of these. pH of gastric juice is (a) 2 (b) 4 (c) 6 (d) 8. Which blood group person can donate the blood to all other persons? (a) A (b) B (c) AB . (d) 0. Spermatogenesis is promoted by (a) oestrogen (b) progesterone (c) testosterone (d) oxytocin. 64. Number of cranial nerves in mammal are (a) 10 pairs (b) 8 pairs (c) 12 pairs (d) 16 pairs. Nitrogenous waste in the Malpighian tubule flows into (a) haemocoel (b) vacuole (c) intestine (d) duodenum. 66. Stage between larval moults is called as 58 B I O L O G Y TODAY|DECEMBER'08 (a) instar (b) morula (c) pupa (d) larva. 67. Name the type of tissue that form gland (a) epithelial (b) muscular (c) squamous (d) cuboidal. Number of cervical vertebrae in mammal are (a) 7 (b) 8 (c) 12 (d) 6. How much solar energy falling on leaf of plant is converted to chemical energy? (a) 1% (b) 10% (c) 100% (d) 60%. 70. Transparent hairs on catkins and caterpillars function to? (a) trap heat (b) trap moisture (c) reflect light (d) drink water. In which area diurnal temperature in soil surface vary? (a) sea (b) lake (c) tundra (d) desert. In which of the following organisms Malpighian tubule is found? (a) honey bee (b) frog (c) Ascaris (d) rabbit. 73 type of eyes are found in insects (a) camera eye (b) red eye (c) normal eye * (d) compound eye. 74. Paramecium is a (a) protozoan (b) bacterium (c) virus (d) annelid. E. coli is a (a) virus (b) bacterium (c) protozoan (d) none of these. Reflex arc consists of (a) motor nerve (b) sensory nerve (c) both sensory and motor nerves (d) none of these. 77. Which type of pyramid of energy is inverted ? (a) grass land (b) tree (c) both of these (d) none of these. 78, The major amount of C0 2 in both invertebrate and vertebrate is transported as (a) carbonic acid (b) carbamino haemoglobin (c) dissolved gas (d) none of these. Which of the following is a hermaphrodite ? (a) ant (b) aphids (c)' earthworms (d) cockroach 8C Monoclonal antibodies are produced from which type of cells ? (a) hybridoma (b) multinucleate (c) prokaryote (d) uninucleate. 81. Which is not a basic renal function ? (a) reabsorption (b) secretion (c) perfusion (d) filtration Which atom is limiting the primary productivity mostly? (a) C (b) P (c) D (d) N. Which of the following ecosystem has very little primary productivity? (a) forest (b) river (c) sea (d) grass land. Which one ofthe following provide non specific pathogen defense for the body? (a) T-cells (b) B-cells (c) phagocytes (d) stem cells Which of the following processes does not affect the nutrient flow in an ecosystem ? (a) migration (b) parasitism (c) predation (d) production. The number of carbon atom in citric acid is (a) 8 (b) 6 (c) 10 (d) 2. In meiosis chromosome replicates during (a) prophase (b) metaphase (c) anaphase (d) interphase. Most abundant lipid in cell membrane is (a) phospholipid (b) starch (c) oil (d) sulpholipid. An organism contains carbon molecules which have passed through three levels of ecosystem. The organism is a (a) primary consumer (b) tertiary consumer (c) predator (d) producer. Cholesterol is a (a) phospholipid (c) steroid (b) wax (d) triglyceride. A molecule is reduced means it (a) loses electron (b) gains proton (c) loses proton and electrons (d) gains electron. Most common monomer of carbohydrate is (a) glucose (b) fructose (c) sucrose (d) maltose. Mutations which normally happen randomly are considered one of the raw materials for evolution because they (a) are stable (b) contribute to new variation in organism (c) cause death of organism (d) none of these. H. M. S. Beagle is associated with which scientist (a) Darwin (b) Lamarck (c) Wallace (d) Columbus. 95, Human sperm moves by (a) cilia (c) basal body (b) flagella (d) nudeosome. In thyroid follicle which type of epithelial tissue is present? (a) squamous (b) cuboidal (c) transitional (d) columnar. Larva of jelly fish (Aurelia) (a) planula (c) medusa (b) polyp (d) blastula. 98. How many pairs of homologous chromosomes are present in human ? (a) 46 (b) 44 (c) 2 2 (d) 2 3 . 99. In anura group of frog, caudal vertebra fused to form (a) coccyx (b) urostyle (c) pygostyle (d) prehensile tail. 100 A person affected by disease having chromosome complement XXX is cailed/having (a) klinefillter's syndrome (b) Down's syndrome (c) super female (d) Turner's syndrome. 10' Offsprings is mating between two pure strain is called (a) hybrid (b) super child (c) hybridoma (d) none of these. 102. Which is not the cellular element of blood? (a) T-cell (b) B-cell (c) plasma (d) monocyte. 103.The end product of glycolysis is (a) pyruvate (b) oxalo acetate (c) glucose (d) galactose. 104.The scientific name of peacock is (a) Corvus splendens (b) Psittacula (c) Pavo cristatus (d) Cotumba livia. 105. Which of the following is the earliest era (a) coenozoic (b) mesozoic (c) paleozoic (d) pre-cambrian. Wings of birds and forelimbs of horse are organs (a) analogous (b) homologus. (c) vestigial (d) none of these. 107. Sickle cell anemia is most resistant to which disease ? (a) malaria (b) filaria (c) dengue (d) chicken pox. 108, Helically coiled shaped "X" organ is found in (a) crustacea (b) porifera (c) insecta (d) amphibia. 109 Poikilotherms are also known as (a) isotherm (b) ectotherm (c) endotherm (d) heterotherm. 110 Which is not a cat ? (a) lion (b) tiger (c) cheetah (d) leopard. 111. Sperm cells are produced in (a) seminiferous tubules (b) interstitial cells (c) epididymis (d) prostate gland. (a) 1 In oogenesis a diploid cell produce (b) 2 (c) 3 113. Larva is found in (a) vertebrates (c) both (a) and (b) ovum/ova (d) 4. (b) invertebrates (d) none of these. B I O L O G Y TODAYJULY08140 Organism with two different allele is (a) heterozygous and homozygous (b) heterozygous for the allele (c) homozygous (d) none of these. MEDICAL COLLEGES of INDIA When organism is in same class but is not in same family, the taxonomic term is called as (a) order (b) genus (c) species (d) family. Now unit of evolution is called (a) population (b) genus (c) order (d) species. Name Closely related species varying different in trait expresses (a) convergent evolution (b) divergent evolution (c) parallel evolution (d) none of these. Instead of tooth, baleen (hanging horny plates in mouth) are found in (a) blue whale (b) shark (c) dolphin (d) Archaeopterix. City AIIMS Delhi Christian Medical College Vellore Armed Forces Medical College Pune King George Medical College Lucknow JIPMER Puducherry Kasturba Medical College Manipal Maulana Azad Medical College New Delhi Grant Medical College Mumbai In oogenesis haploid egg is fertilized by sperm at which stage? (a) primary oocyte (b) secondary oocyte (c) oogonium (d) ovum. Seth GS Medical College Mumbai St John's Medical College Bangalore Madras Medical College Chennai Osmosis is the diffusion of (a) solute (b) free energy (c) water (d) solute and solvent. Institute of Medical Sciences, BHU Varanasi LTM Medical College, Sion Mumbai PBDS PGIMS Rohtak BJ Medical College Pune 1_ ANSWER KEY 4. 2. 3. (C) (a) (d) (a) (b) ~t 9, 10. (b) (b) (c) (a) (b) 12: (c) 13. (d) 14. (b) (a) (c) 1R 20. (d) 16. (d) 17. (c) 19 (a) (b) 21. (a) 22. (b) 24. (b) 25. (c) (a) 27. (a) 28 29. (a) 30. (b) (a) (d) 31. (a) 32. (b) 33. (d) 34. (b) 35. (a) 40. (a) 36. (c) 37. (a) 38. (a) 39. (b) 42. (0 43. (a) 44. (c) 45. (b) 41. (b) 49* (a) 47. (b) 48. (b) 50 46. (a) (d) 55. (b) 51. (c) ' 52. (c) 53. (d) jt. (c) 56. (b) 57. •(b) 58. (a) 59. (b) 60. (c) 61. (a) 62. (d) 63. (c) 64. (c) 65. (c) CO 66. (a) 67. (a) 69. (a) 70. (b) (a) 72. (a) 73. (d) 74, (a) 75. (b) 7 1 (d) 79. (c) 76. (c) 77. (d) 78. (a) 80. (a) 81. (c) 84. (c) 85. (a) 82. (a) (b) 88, (a) 86. (b) 87. (d) 89. (b) 90. (c) 94. (a) 95. (b) 91. (d) 92. (a) 93. (b) 96. (b) 97. (a) 98, (d) 99. (b) 100. (0 101. (a) 102. (c) 103. (a) 104. (c) 105. (c) 106. (b) 107. (a) 108. (a) 109. (b) 110. None of the options is correct. All animals given in the options belong to the cat family. 114. (b) 111. (a) 112. (a) 113. (c) 115. (a) 116. (c) 118, (a) 119. (b) 120. (c) 116. (a) For detailed Solutions refer MTG's New Revised ORISSA iEE Explorer WM |BSijHH Amrita Institute of Medical Sciences I Kochi Bangalore Medical College Bangalore Christian Medical College Ludhiana Sri Ramachandra Medical College Chennai Osmania Medical College Hyderabad Medical College Kolkata Stanley Medical College Chennai Lady Hardinge Medical College New Delhi Kempegowda Institute of Medical Bangalore Sciences Gandhi Medical College Hyderabad Government Medical College Chandigarh MS Ramaiah Medical College Bangalore Mahatma Gandhi's Mission Medical Aurangabad College H ^ j l Jawaharlal Nehru Medical College Belgaum University College of Medical Sciences Delhi Source: Mint B I O L O G Y TODAY JULY 0 Solved Paper 2008 WB JEE INSTRUCTIONS - Question paper consists of t w o sections : Section A contains multiple choice questions. Each question carries 1 mark. Section B contains short answer type questions. Each question carries 2 marks. For each incorrect answer one-third (1/3) mark will be deducted. SECTION A In guava, cucurbits flowers are (a) hypogynous flower (b) epigynous flower (c) perigynous flower (d) both hypogynous & perigynous In floral formula (K) denotes (a) polysepalous (b) gamosepalous (c) polypetalous (d) gamopetalous Which of the following is ideal for studying meiosis ? (a) gamete (b) pollen (c) microsporangium (d) root To which of the following flower 'synandrous' condition is found ? (a) sunflower (Helianthus sp) (b) gourd (Cucurbita sp) (c) pea (Pisum sativum) (d) lemon (Citrus sp) 5. (a) (b) (c) (d) Which of the following is photophosphorylation ? production of ATP from ADP production'of NADP synthesis of ADP from ATP production of PGA What is the structural element of cell wall ? (a) matrix (b) microtubules (c) microfibrils (d) arabinogalactans Which chemical is used for induction of polyploidy ? (a) cytokinin (b) nitrous acid (c) colchicine (d) IAA In which book Bentham & Hooker proposed their classification ? (a) Genera Plantarum (b) Species Plantarum (c) Historia Plantarum (d) Historia Naturae When does a plant wilt ? (a) when phloem is blocked (b) when xylem is blocked (c) pith is removed (d) a few leaves are removed Which of the following sequence is a correct one for a meiotic cell cycle ? (a) G, - 4 S G2 M - » G, (b) G, G2 S M - > G2 (c) G2 G, S -> M G2 (d) S - ^ G , - > G 2 - > M - h > S In the following pairs where do you get lignin in both the element ? (a) trachid & collenchyma (b) sderenchyma & sieve-tube (c) sderenchyma & trachea (d) parenchyma & endodermis 12. From which of the following photosynthetic autotrophs receive their energy ? (a) heat (b) inorganic chemicals (c) organic chemicals (d) light 13 Study of pollen grain is called (a) ethmology (b) palynology (c) paleobotany (d) co-taxonomy 14. A substance that induces dormancy of seed is (a) ABA (b) GA (c) thio-urea "(d) cytokinin 15. Plants purify air by which process ? (a) photorespiration (b) photosynthesis (c) photophosphorylation (d) transpiration 16. One ofthe characteristic of sieve tube is (a) it is a part of phloem (b) function is transport of inorganic solutes (c) it is dead cell (d) sieve plate is not present Chromosome replicate in which stage of meiosis ? (a) prophase I (b) prophase II (c) telophase I (d) interphase Which one of the following conditions in chromosome number is called monosomy ? (a) 2n +1 (b) 2n + 2 (c) 2 / ? - 1 (d) 2 n - 2 Which one of the following statement correctly define the term homonym ? (a) identical name of two different taxon (b) two or more names belonging to the same taxon (c) when species name repeats the generic name (d) other name of a taxon given in a language other than the language of zoological I botanical nomenclature B I O L O G Y TODAY JULY 08 142 20. Which of the following is called stress hormone ? (a) absicic acid (b) auxin (c) cytokinin (d) gibberellic acid Dimorphism of chloroplast is found in (a) C3 plants (b) C4 plants (c) CAM plants (d) both C4 & CAM plants 22. Which of the following element is responsible for minamata disease ? (a) Hg (b) Pb (c) Cd (d) Fe 23. may (a) (b) (c) (d) Shorter generation time of E.coli compared to eukaryotes be explained on the basis of shape large surface : volume ratio presence of cell wall absence of organelles Division in a bacterial cell is carried out through (a) multiple fission (b) binary fission (c) budding (d) plasmotomy The Gram ( - ) bacteria detect & respond to the chemicals in their surroundings by (a) muramic acid (b) lipopolysaccharide (c) volutin granules (d) porin 26. Mesoglia is seen in between (a) ectoderm and endoderm (b) ectoderm and mesoderm (c) mesoderm and endoderm (d) just below mesoderm Green gland is the excretory organ of (a) prawn (b) butterfly (c) snail (d) earthworm The parasite which completes its life cycle in a single host is (a) Fasciola hepatica (b) Plasmodium vivax (c) Taenia solium (d) Ascaris lumbricoides Name one disease of mulberry silk worm caused by protozoa (a) pebrine (b) graseri (c) flacheri (d) muscardine Water vascular system is present in which of the following phylum ? (a) porifera (b) cnidaria (c) ctenophora (d) echinodermata Which one of the following bacterium is used extensively as biopesticide ? (a) Bacillus subtilis (b) Bacillius thuringiensis (c) Streptococcus iactis (d) Lactobacillus acidophilus Which one among the following is just a cloning plasmid not an expression plasmid ? 62 B I O L O G Y TODAY|DECEMBER'08 (a) pBAD-18-Cam (c) pUC 18 (b) pBCSK (d) pET 'Royal jelly' is secreted from (a) hypopharyngeal gland (b) salivary gland (c) milk gland (d) integumentary gland 'Gill rot' disease in fishes is caused by (a) Aeromonussp (b) Bacillus polymixa (c) Bran sanguinis (d) Bucillus subtilis Pests which only feed and oviposit on crop are called ? (a) major pest (b) minor pest (c) accidental pest (d) occassional pest 36 In which tripioblastic animal coelom is absent ? (a) platyhelminthes (b) aschelminthes (c) annelids (d) arthropoda Name one frequently used fungicide (a) griseofulvin (b) chloramphenicol (c) cycocel (d) ethylene A waxy substance produced by honey bee to repair combs is called (a) propolis (b) honey dew (c) nectar (d) sporopollenin Small paritides projecting from the inner membranes and cristae of mitochondria are known as (a) myeloid bodies (b) microsomes (c) informosomes (d) oxysomes In which of the following phyla compound eyes are present ? (a) annelida (b) arthropoda (c) mollusca (d) echinodermata Which one of the following is not a major carp ? (a) Cirrhinus mrigala (b) Puntiustieto (c) Ctenopharyngodon idelia (d) Labeorohita Which one of the following is the infective stage of Ascaris lumbricoides ? (a) unsegmented egg (b) egg with first stage larva (c) egg with second stage larva (d) free third stage larva Which one of the following statements are not related to Scirpophaga incertulus ? (a) adult stage never cause any damage to the plant (b) it is a polyphagous pest (c) it feeds on inner tissues of the stem (d) it is inactive during day but active in evening In which stage of its life cycle the silk moth begins to produce silk fibre ? (a) 3rd instar larva (b) 4th instar larva (c) 5th instar larva (d) pupa The vector of the kala-azar is (a) Aedessp (b) Anopheles stephensi (c) Culex fatigans (d) Phlebotomus sp The resolving power of a compound light microscope will be greatest if the source of light is (a) blue (b) green (c) yellow (d) red Which of the following be named for DNA produced from RNA ? (a) A-DNA (b) B-DNA (c) CDNA (d) Z-DNA (a) Which of the following is not a greenhouse gas ? N20 (b) CFC (c) 0 3 (d) S0 2 India become a party to 'Convention on Biological Diversity' in the year (a) 1994 (b) 1993 (c) 1992 (d) 1988 Increase of BOD in water leads to (a) increase in the dissolved 0 2 concentration (b) decrease in the dissolved 0 2 concentration (c) maintenance of dissolved 0 2 concentration at the same level (d) no effect on dissolved 0 2 concentration Freon gas causing stratospheric 0 3 depletion is mainly released from (a) refrigerator (b) automobile (c) thermal power plant (d) steel industry The eqn. (a) natality (c) mortality AN. = B respresents which of the following ? (b) growth rate (d) all of these Identify which one ofthe following is an e.g. of incomplete ecosystem ? (a) grassland (b) cave (c) river (d) wetland 5- Which of the following hormone helps in secretion of HCI from stomach? (a) renin (b) gastrin (c) secretin (d) somatomedin Liquid which collects in Bowman's capsule is (a) water and sulphates (b) water and glycogen (c) plasma minus blood protein (d) concentrated urine. Diabetes insipidus is caused due to the lack of (a) ADH (b) ACTH (c) insulin (d) glucagon Down's syndrome occurs as a result of (a) trisomy (b) tetrasomy (c) autopolyploidy (d) allopolyploidy Which statement is incorrect for ion-channels ? (a) they are proteins (b) movement through them is simple diffusion. (c) movement, through them is from high to concentration. (d) all ions pass through the same type of channel. low Quarternary structure of protein (a) consists of four subunits (b) may be either a or p. (c) is unrelated to two function of the protein (d) is dictated by the primary structures of the individual subunits. 60. (a) (c) (d) Primary and secondary active transport both generate ATP (b) use ATP directly can move solutes against their concentration gradient include the passive movement of glucose molecule. Which type of membrane is most abundant within a cell? (a) ER membrane (b) nuclear membrane (c) Golgi membrane (d) plasma membrane Only one of the following four ways through which AIDS can spread? (a) infected needles and syringes (b) through mosquito bites (c) looking after AIDS patient (d) shaking hands, coughing, sneezing, hugging. Passive immunity can be obtained through (a) antigens (b) vaccines (c) antibiotics (d) antibodies Part ofthe brain concerned with the muscular movement is (a) cerebellum (b) thalamus (c) hippocampus (d) temporal lobe of cerebrum Active immunity development is related to (a) natural killer cells (b) memory cells (c) helper T cells (d) suppresserT cells In human corpus callosum connects (a) the two optic lobes (b) bone and muscle (c) the two cerebral hemispheres (d) two lobe of pituitary gland. (a) (b) (c) (d) Broca's area of speech is present in parietal lobe parietal lobe and partially in temporal lobe temporal lobes temporal and occipital lobe Filariasis is caused by (a) dead adult filariae (b) microfilariae (c) biting of filarial worm (d) presence of bacteria in filarial wall B I O L O G Y TODAY JULY 08 63 69. Identify the sulphur containing AA? (a) proline (b) methionine (c) asparticacid (d) tryptophan sativa stands for (a) specific name (c) species name Which of the following statements is related to Starling's law of heart ? (a) greater the stroke volume greater is the heart rate (b) greater the initial length of the cardiac muscle fibre, more is the force of contraction of heart. (c) greater the minute volume, greater is the heart rate (d) lesser the length of cardiac muscle fibre greater is the force of contraction of heart. 80. The first carbon fixation in C4 pathway occurs in chloroplasts of (a) guard cells (b) mesophyll cells (c) bundle sheath cells (d) epidermal cells 71. Indicate, the inheritance of which of the following is controlled by multiple alleles (a) colour blindness (b) sickle cell anaemia (c) blood group (d) phenylketoneuria Mentioning features give four differences between Arthropoda and Mollusca. 72. Which of the following conditions is related to haemophilia? (a) a recessive gene responsible present in the X chromosome (b) a dominant gene responsible present in the X chromosome (c) a responsible dominant gene present in the Y chromosome (d) a responsible dominant gene present in the autosomal chromosome 73. The organ in the human body where glycogenolysis takes place? (a) muscle (b) liver (c) small intestine (d) kidney 74. Which of the following carbohydrates disaccharide? (a) malotose (b) lactose (c) sucrose (d) galactose is not a 75. The absence of which clotting factor leads to haemophilia A? (a) factor VII (b) factor VIII (c) factor IX , (d) factor X Which of the following vitamins are fat soluble ? (a) A, B, C, K (b) A, B, D, E (c) A, D, E, K (d) A, D, C, K 77. not (a) (c) In which method of transport in plasma membrane does require carrier molecule ? active transporf (b) facilitated diffusion simple diffusion (d) N a + - k + p u m p . Which structure is present in both prokaryotic & eukaryotic plant cells? (a) cell wall (b) nucleus (c) chloroplast (d) mitochondria Oryza sativa is the binomial name of the rice plant, the 64 B I O L O G Y TODAY|DECEMBER'08 (b) specific epithet (d) specific nomenclature SECTION B What are red data Book and green data book ? 2. What is complete linkage ? Give two characteristic features of meristimatic tissues. Write down the names of two artificial auxins used in agriculture & horticulture. Write down the names of bile salts. What do you mean by the terms neurotransmitters and neurohormones. Write down the name of the hormones released by placenta. 9, What are the main components of Haemoglobin A ? 10. Why is photosynthesis an anabolic process ? SOLUTIONS SECTION A 1 (b) 2. (a) 3. (b) 8. (a) 9. (b) 10. (a) 15.(b) (a) 17. (d) 22. (a) (b) 24, (b) (b) (d) 29. (a) (a) (a) 36. (a) (d) (d) (b) (b) (a) 50. (b) (d) 59. (d) (a) (b) 66. (c) 64. (a) None of the options is lobe. 68. (b) 69. (b) 70. (b) 75. (b) 7 6 . ( 0 7 7 . ( 0 (b) 12. (d) 19. (a) 18.(0 25. (d) 26. (a) (a) (0 40. (b) 39. (d) 46. (a) 47. (0 53. (b) 54. (b) (a) 60. (0 4. (b) 11 (c) 6. (d) 7. 13. (b) 14. (a) 21. 27. (a) 28. 3 4 . ( 0 35. 41. (b) 42. 48. (d) 49. 5 5 . ( 0 56. (a) 63. correct. The correct option is frontal 71.(0 78. (a) 72. (a) 79. (a) 73 J 80 J 74. (d) SECTION B 1 IUCN (now known as WCU)'s list of endangered, extinct, vulnerable and other types of animals and plants are recorded in the red data book and the same list for only plants is recorded in green data book. The genes located in the same chromosome do not separate and are inherited together over the generations due to the absence of crossing over. Complete linkage allows the Revised • H l f Covers complete syllab About 5000 MCQs envelope all topics. •> Must for IIT-JEE, AIEEE and all other Engineering Entrance Examinations. CBSE-PMt, AIIMS, AFMC and all other Medical Entrance Examinations, Selected questions from 2005, 2006, 2007 and 2008 Entrance Exams. Send D.D/M.O in favour of M T G Books. Add Rs. 35 for postage , Available at leading book-shot M T G B O O K S 503, Taj Apt., Ring Road, Near Safdarjung Hospital New Delhi - 110 029. Tel.: 26191599, 26191601 e-mail: info@mtg.in web : www.mtg.in combination of parental traits to be inherited as such. It is rare but has been reported in male Drosophila and some other heterogametic individuals. Example : a red eyed normal winged (wild type) pure breeding female Drosophila is crossed to homozygous recessive purple eyed and vestigial winged male. The progeny or F, generation individuals are heterozygous red eyed and normal winged. When F, males are test crossed to homozygous recessive female (purple eyed and vestigial winged), only two types of individuals are produced - red eyed normal winged and purple eye vestigial winged in the ratio of 1.: 1 (parental phenotypes only). Similarly inbreeding of Fq, recombinant types are absent. In practice, this 1 : 1 test ratio is never achieved because total linkage is rare. SI. no. Arthopoda Mollusca 1. Organ system level of organization Tissue system level of organization 2- mantle membrane absent mantle membrane present 3. Circulatory system of open Circulatory system mainly type of closed type 4. Excretory organ are Excretery organs are pair green gland, coxal gland, of kidneys Malpighian tubules 4. T ie characteristic features of meristomatic tissues are : (i) Cells of meristematic tissue are isodiametric in shape (with prominent nuclei and dense cytoplasm). (ii) Cells are of various shapes like oval, spherical, rounded or rectangular and lacks intercellular spaces. Protoplast is present but ergastic substance are absent, ER small, mitochondria simple. Placenta is a temporary endocrine gland. It secretes some hormones like oestrogens, progesterone, human chorionic gonadotropin (HCG), human chorionic somatomammotropin HCS (formerly known as human placental lactogen)', chorionic thyrotropin, chorionic corticotropin and relaxin. The globin portion of haemoglobin A (HbA) consists of two a-chains and two (3-chains (a2(32). Each a-chain contains 141 amino acids while (3-chain contains 146 amino acids. The four subunits of haemoglobin are held together by non-covalent interactions primarily hydrophobic, ionic and hydrogen bonds. Each subunit contains a heme group. Hem contains a porphyrin molecule mainly protoporphyrin IX with iron at its center. Photosynthesis is called an anabolic process because in this process glucose (C 6 H 12 0 6 ) molecules are synthesised from atmospheric carbon dioxide (C0 2 ) and soil water (H 2 0) with conservation of photonic energy (energy from sun) of the visible wave length of sunlight as a biochemical energy within the complex glucose molecules. For more detailed solutions read MTG's Chapterwise West Bengal JEE Explorer mmEE 2009 YtdbGr 1 Based on new syllabus & latest pattern Many auxins have been synthesized and some examples of synthetic auxins are indole-3-butyric acid (IBA), naphthalene acetic acid (NAA), 2, 4-dichlorophenoxy acetic acid (2, 4D), 2, 4, 5-trichlorophenoxyacetic acid (2, 4, 5 -T). Auxins like IAA, I PA, NAA and IBA are commercially used to induce parthenocarpy in banana, orange, citrus, guava etc. Sodium bicarbonate, sodium glycocholate and sodium taurocholate are the bile salts that help in the digestion of fats in the small intestine by bringing about their emulsification. 7. Neurotransmitters are the chemicals released by axon terminals in a synaptic cleft to transmit nerve impulse, for e.g. acetylcholine, GABA etc. Neurohormones are the hormones that are produced not by an endocrine gland but by a specialized nerve cell and are secreted from nerve endings into the bloodstream or directly to the tissue or organ whose growth or function they control. Examples of. neurohormones are noradrenaline, antidiuretic hormone and hormones associated with metamorphosis and moulting in insects. B BIOLOGY TODAY JULV 08 Z J L 1L i Mathemetk* | Phytic* | PCR (polymerase chain reaction) IgA, Colostrum (B) Passive immunity — > Biomining, Acid mine (C) Thiobacillus drainage (D) Methanogens — » Ruminants, Global warming Lysogenic cycle, Transduction (E) Bacteriophage (a) (i) —> A (ii) —> D (iii) —> E (b) The two replication cycle or life cycle that take place in virus are lytic and lysogenic cycle. The fundamental difference in these two groups is that a lytic phage kills (lyses) its host bacterium very soon after the initial infection, resulting in the release of progeny phages, whereas a lysogenic phage has a choice between two life styles after infection : either it can follow a lytic course (kills the host cell and produces many progeny), or alternatively it can enter the lysogenic pathway. ( 0 A living place of an organism is called its habitat while niche includes habitat as well as functional role of an organism in the community, i.e., trophic structure. Thus ecological niche is the profession of the species. (a) The amount of nutrients such as P, S, C, N, H etc., present at any given time in the environment of an ecosystem, is known as the standing state or standing quality. The amount of living material, present in a component population at any time, is known as the standing crop, which may be expressed in terms of numbers or weight per unit area. Biomass is the standing crop expressed in terms of weight'(i.e. organism mass) of the living matter present. (c) During photosynthesis Chlorobium is capable of synthesizing their organic food in presence of light and in absence of 0 2 . The equations of reaction is: Chlorobium chlorophyll CO, + 2H,A 2 2 far red light (720 - 750 nm) (CH 2 0) + 2A or A, H2O while in Nostoc, photosynthesis results in the release of oxygen derived from the splitting of water molecules in a manner very similar to higher plants. (d) Cell wall of E.coli consists of polysaccharides, proteins and lipids. One of the unique component of B I O L O G Y TODAY JULY 08 157 cell wall is peptidoglycan or mucopeptide or murein, while the cell wail of Methanococcus doesn't contain cellulose or peptidoglycan. It contains proteins and non cellulosic polysaccharides. (e) In Claviceps ascospores are produced in small, thinwalled sac-like units called asci. These ascospores are endogenous in origin. In Agaricus a typical basidium bears four basidiospores which arise exogenously. 8. (a) Cyclosporin Fungus 9. (a) (b) Soyabean, Rhizobium Archaebacteria (c) (d) UNCED 1992, Brazil Anaerobic respiration Fermentation (1) Production of ATP (2) It is intracellular bio- (2) chemical reaction It is extra cellular biochemical reaction (3) It is induced by endoenzymes This is induced by exoenzymes (1) (3) No ATP production (b) Black or stem rust is caused by Puccinia graminis tritici. Its life cycle starts with following spores in sequence: uredospores —> teleutospores —> basidiospores —> pycniospores aecidiospores. (c) Bt toxin is a toxic insecticidal protein obtained from a soil bacterium Bacillus thuringiensis.lhe Bt toxin proteins exist as inactive protoxins but once an insect ingests the inactive toxin it is converted into an active form of toxin due to the alkaline pH of the alimentary canal that soiublizes the crystals. The activated toxin binds to the surface of midgut epithelial cells and create pores which cause cell swelling and lysis and finally cause death of the insect. (d) Monascus purpureus is the source of statins. Its ingredients called monacolin K inhibit the production of cholesterol by stopping the action of a key enzyme in the liver (e.g. HMG-CoA reductase) that is responsible for manufacturing cholesterol. (e) VAM haustoria or vesicular - arbuscular mycorrhizas has derived the name vesicular arbuscular from structures formed by the infecting fungus in host tissue. Ectomycorrhiza 12. (a) TZF i - i I I - > Normal male | | ~> Affected male Q —> Carrier female Q Normal female (b) Phenylketonuria is an inborn autosomal recessive metabolic disorder in which the homozygous recessive individual lacks the enzyme phenylalanine hydroxylase. If a normal father is crossed with carrier mother then following results are obtained. Normal father AA x AA Carrier mother Aa A A AA Aa AA Aa which by punnette square method can be written as: Aa (2) Hebeloma (2) Glomus (3) Psilocybes (3) Gigaspora Hair, Nail, Skin, Ringworm Rhizoctonia, BIOTROL - 6 I Aa Sclerocystis B I O L O G Y TODAY | JULY 08 11. (i) True (ii) False : The cranial capacity of Neanderthal man was 1,300 to 1,600 cubic centimetres. (iii) True (iv) True (v) False : Australopithecus was an African ape man who lived in Africa. They were about 1.5 metres high and had human as well as ape characters, (vi) False : Hardy Weinberg equilibrium states that.gene frequencies remains constant within a large population over a period of time assuming that mating is random, there is no natural selection, no migration and no mutation. (vii) True (viii) True AA (1) 88 DEVINE, Bioherbicide Bionematocide Bioinsecticide AA Laccaria Trichophyton Trichoderma - Phytopthora Arthrobotrys Metarrhizium Endomycorrhiza (1) 10. (A) (B) (C) (D) (E) normal carrier This shows that this family has never had an affected girl because we know that this disease occurs only in homozygous recessive condition. So phenylketonuria is not possible. 13. (a) The given figure is of elbow or hinge joint which is a type of synovial joint. The part labelled as 1, 2, 3 and 4 are called humerus, hyaline articular cartilage, synovial fluid and synovial membrane. (b) Hyaline articular cartilage which forms articular surfaces at the joints consists largely of glycosaminoglycan, giving it a shiny glass like appearance. This gives flexibility and support at the joints. Synovial fluid is a thick sticky fluid secreted by synovial membrane. This acts as a lubricant to the joint, provides nutrient materials for the structures within the joint cavity and helps to maintain the stability of the joint. (c) Besides connective tissue, striated or striped or skeletal muscular tissue is present which helps in contraction of muscle and thus helps in movement. (d) The other such joint found in our body is knee joint which occurs between the end of the femur, the top of the tibia and the back of the patella and the structure which is analogous to part (1) is femur. (i) The parts labelled as 3,4, 5 and 6 in the given figure are —> Bowman's capsule, ascending limb of Henle's loop, collecting duct and proximal convoluted tubule. (ii) Bowman's capsule helps in the process of ultrafiltration or glomerular filtration. (iii) Ultrafiltration is one of the important processes of urine formation. It is filtration under pressure and this pressure is high. It is high because glomerular capillaries are narrower than the afferent renal arteries.'These glomerular capillaries rejoin to form an efferent arteriole by which a reduce volume of blood leaves the glomerulus. So if diameter of '2' i.e. efferent arteriole is made double to the part '1' i.e. afferent arteriole, ultrafiltration will not occur. (b) If the prostate gland is enlarged in old age, it frequently blocks the urethra and makes urination painful or difficult. (2) Ctenophora (1) It is transparent animal showing celltissue grade of body organization. Echinodermata (1) It is unsegmented show-' ing organ - system grade of body organisation. It is triploblastic coelomate showing bilateral symmetry in larvae but pentamerous radial symmetry in adults. (c) According to the position of heart .and organs of respiration following are the differences between cockroach and frog: Cockroach Frog (1) In this, dorsal or peri- (1) cardial sinus present on the dorsal side below the terga encloses the heart i.e., its positions is dorsal. In this, heart is situated midventrally in the thorax in between the two lungs, just anterior to the liver i.e., its positions is ventral. (2) Its respiratory system (2) consists of spiracles, tracheae, and tracheoles. Its respiratory system consists of skin, buccopharynx and lungs. 14. (a) 15. (a) The correct sequence of given ear ossicles is malleus, incus and stapes. These ear ossicles transmit the vibrations from tympanic membrane to the internal ear and also amplify them about ten times. (b) According to the body organisation and symmetry following are the differences between Ctenophora and Echinodermata : Symmetry is biradial (2) along an oral-aboral axis. (d) P-wave and QRS complex represent an electrocardiogram of heart which is a graphic record of the electric current produced by the excitation of the cardiac muscles. P wave is a small upward wave that indicates the depolarization ofthe atrial contraction and is caused by the activation of SA node. QRS wave complex represents ventricular depolarisation and is caused by the impulses of the contraction from AV node. (e) According to location and function following are the difference between corpus callosum and corpus luteum: Corpus callosum Corpus luteum (1) it is broad band of ner- (1) vous tissue that connects the two cerebral hemispheres containing an estimated 300 million fibres. It is glandular tissue in the ovary that forms at the site of a ruptured Graffian follicle after ovulation. (2) It enables the transfer (2) of information from one cerebral hemisphere to the other. It secretes the hormone progesterone which prepares the uterus for implantation. 16_ (a) GIFT is an assisted reproduction technologies which helps in transfer of an ovum collected from a donor into the Fallopian tube of another female who can not produce young ones but can provide proper environment for fertilisation and further development, (b) CuT and Cu7 are the intrauterine contraceptive B I O L O G Y TODAY | JULY 08 89 devices which are used as birth control devices. The copper ions released reduces sperm motility and its fertilising capacity. The hormones released makes the uterus unstable for implantation and the cervix hostile to the sperms. (c) Klinefelter^ syndrome is a genetic disorder which occurs due to trisomy of sex chromosome which shows gynaecomastia like character and its karyotype is 44 + XXY i.e., individual has 47 chromosome. (d) Colostrum is the first secretion from the breast occurring shortly after or sometimes before birth prior to the secretion of true milk. This is yellowish fluid that contains cells from the alveoli and are rich in protein and low in fat. It is rich in antibodies (Ig A is the major immunoglobulin) and provides passive immunity to the new born infant. (e) The sequence of accessory ducts in human testis after seminiferous tubules is rete testis vas efferentia —> caput epididymis —» cauda epididymis vas deferens - » urethra. 17. (a) Kangaroo rat may live whole life without water, urea is the main excretory product. (b) Diesel automobile S02, suspended particulate matter (c) Methemoglobinaemia excess nitrates in water, can be fatal to infant (d) Endangered species —> wolf, wild ass, Red panda, Great Indian bustard (e) Ozone hole —> CFC 18. (a) There are various factors by which normal cells differ from cancer cells. Cancer cells Normal cells (1) They do not undergo (1) differentiation. They undergo differentiation. (2) The cells do not require (2) extracellular growth factors. The cells require extracellular ' growth factors. (3) Cells do not remain (3) adhered. Cells remain adhered to one another. (4) Cancer cells undergo (4) uncontrolled divisions. Cell divisions regulated. (5) Cell death is inhibited. Normal cells have finite life span. (6) They tend to form tu- (6) mours. 90 (5) Tumours formed. B I O L O G Y TODAY|DECEMBER'08 are are not (7) They pass out of tumours to reach new sites (metastasis) (7) There is no passage from one site to another. (8) Nucleus is irregular, hypertrophied and granular. (8) Nucleus 1s rounded or oval with normal chromatin reticulum. (9) The cells are rich in melanin, mucus, fat drops and lysosomes. (9) They have a normal number or amount of these substances. (10) Mitochondral are fewer. cristae (10) Mitochondrial cristae are normal. (11) Cellular gene is onco- (11) gene Cellular gene is proto-oncogene. (b) The correct carcinogens are asbestos, gamma rays, tobacco smoke, and arsenic. (c) Detection and diagnosis of cancer depends upon histological features of malignant structure. (I) Biopsy of bone marrow and abnormal count of WBCs is done in case of leukemia. (ii) Pap test (cytological staining) is used for detecting cancer of cervix and other parts of genital tract. (iii) Techniques such as radiography, CT scan (computed tomography), MRI scan (magnetic resonance imaging) are very useful to detect cancers of the internal organs. 19. (a) The stages A, B, C, and D are multiplication stage, growth stage, maturation stage and spermiogenesis stage and the cells are spermatogonia, primary spermatocyte, secondary spermatocyte and spermatids. (b) The numerical valve of E, F and G are 46, 23 and 23 respectively. (c) The structure represented by R and S are primary oocyte and secondary occyte. (d) M and N are first polar body and second polar body. M and N are smaller than S and ovum because first and second meiotic division results in unequal haploid daughter cells i.e., unequal cytokinesis occurs. The resulting polar bodies have small amount of cytoplasm which helps to retain sufficient amount of cytoplasm in the ovum which is essential for the development of early embryo and also formation of polar bodies maintains half number of chromosomes in the ovum. 20. (a) (c) (e) (g) (i) Monera Triacylglycerides SER Passive Glycoprotein (b) (d) (f) (h) (j) Dinucleotide Uridine Leydig cells Animal Allosteric enzyme emus STB5 O O O O O O O All students preparing for PMT examinations can participate in V H B i o - G e n i u s Contest. Answers marked only on the entry form of the magazine / photocopy of form will be accepted. More than one response to a question will be disqualified. Prizes . 1 st Prize - LG Mobile phone • 2nd Prize - Adidas Bag • 3rd Prize - MTG Books (worth Rs. 500/-) The entries with maximum number of correct answers for three consecutive months (Aug '08 - Oct '08) will be awarded 1st prize. 2nd and 3rd prize will be given to the next maximum scorers. In case of a tie, the winners will be decided through a lucky draw. The decision of the editor will be final and binding in all cases and will not be a matter for consideration of any court and no correspondence will be entertained. Name and photograph of the prize winners of this contest will be published in the December issue. MTG is not responsible for any postal delays, transit losses or mutilation of entries. O Last Date: The entries should reach on/before 31s1 August '08 to WfcfcG" Bio-Genius Contest, 406, Taj Apartment, Ring Road, Near Safdarjung Hospital, New Delhl-29. Which of the following statements is incorrect? (a) endospores are highly resistant bodies produced within the cells of certain gram positive bacteria only. (b) the process of endospore formation is known as sporulation and it results into only one endospore formation from a single bacterium. (c) besides being a mean to tide the unfavourable conditions they also help the bacteria in reproduction. (d) the high resistance of the endospores is attributed to dipicolinic acid present in the endospores which is not found in the vegetative cells of bacteria. Match column I and column answer using the codes given Column I (1) Oyster mushroom (2) White button mushroom (3) Entomogenous fungi (4) Patulin (a) (b) (0 (d) (1) D D B B (2) B C D A (3) A E A C (4) C A E E II and select the correct below Column II (A) Cordyceps (B) Agaricus bisporus (C) Aspergillus clavatus (D) Pleurotus streatus (E) Blakeslea trispora 3. Which of the family lacks betacyanin in their body? (a) chenopodiaceae (b) caryophyllaceae (c) cactaceae (d) aizoaceae 4. Pyrenoids are absent in the chloroplast of (a) Chlamydomonas (b) Batrachospermum (c) Spirogyra (d) Polysiphonia 5. The genus Porphyra of rhodophyta is similar with which of the following member of chlorophyceae? (a) Prasiola (b) Cutleria (c) Corallina (d) Gracilaria 6 Aspergillus niger is a fungus which is used to determine the availability of certain metals. They are (a) magnesium (b) potassium (c) molybdenum (d) all of these 7. In which of the following bacteria the energy source & carbon source are usually the same organic compound? (a) photoheterotrophs (b) chemoorganotrophs (c) photoorganotrophs (d) chemolithotrophs. 8. Bacteria that fix CO, in a cycle involving organic acids instead of using ribuiose biphosphate cycle are (a) mycoplasmas (b) L-forms (c) methanogens (d) cyanobacteria B I O L O G Y TODAY AUGUST 08 I I \ ' Virus which helps a satellite virus to successfully infect & replicate inside the host cell is called as (a) activator (b) promotor (c) enhancer (d) prions Scientist who studied life cycle of Draparnaldiopsis indica & suggested usar land reclamation using blue green algae (a) R.N.Singh (b) M.O.P. Iyengar (c) H.D.Kumar (d) T.V. Desikachary. The figure shows an early embryo of Lycopodium complanatum, the sequence of developmental changes in B will be (a) the 2 cells divide transversly to give rise to 8 cells & by further divisions develop into foot. (b) the 2 cells divide transversely to give rise to 4 cells & then it develops into stem & first leaf. (c) the 2 cells divide transversly to give rise to 4 cells & develop into foot. (d) the 2 cells divide transversly to give rise to 4 cells & by further division form protocorm which later develops rhizoids on its lower surface & protophyll on its upper surface. 12. An experiment was performed on Equisetum debile, in set 'A' spores of E debile were placed in a crowded manner while in set 'B' the spores were not crowded. What will happen? (a) prothalli remained small & produced only antheridia in set A while prothalli were larger & monoecious with archegonia developing before antheridia in set B. (b) prothalli remained small & produced only antheridia in set A while prothalli were larger & monoecious with antheridia developing before archegonia in set B. (c) prothalli remained small & monoecious with antheridia developing before archegonia in set A while prothalli were larger & monoecious with archegonia & antheridia developing simultaneously in set B. (d) prothalli remained small & produced only antheridia in set A while prothalli were larger & monoecious with archegonia & antheridia developing simultaenously. A 'massula' (A) Is a hardened alveolar material within which microspores are embedded. (B) Is present in Marsilea. (C) Is present in Azolla. (D) Is a hardened alveolar structure which develops from tapetal Plasmodium & envelops the megaspore. Which of the above statements are correct? B R B I O L O G Y TODAY | AUGUST '08 (a) A, B, D. (b) A, C, D. (c) B S D . (d) A, B, C & D . 14. Match column I and column II and select the correct answer using the codes given below Column II Column 1 (A) Andraea (1) Ceylon moss (B) Selaginelia rupestris (2) Granite moss (C) Gracilaria lichenoides (3) Birds Nest moss (D) Pogonatum (4) Cord moss (E) Funaria. (4) (1) (2) (3) A E B (a) D E A B (b) C D B A (0 E E (d) C A D 15. (a) (b) (c) (d) meiospores of red & some brown algae exact replica of parents of some yellow green algae. mitospores of brown algae. meiospores of golden brown algae. 16. Purple brown colour to show is imparted by (a) Hormidium flaccidum (b) Scotieiia nivalis (c) chlamydomonas flavovirens (d) Ancylonema 17. Hofmeister reported a phenomenon related to life cycle of organisms. What was it? (a) conjugation (b) hetrokaryotisation (c) double fertilization (d) alternation of generation. 18. Internal tissues in gymnosperm leaves consisting of parenchymatous & tracheidal cells which perform the function of lateral veins are (a) hydrostereom (b) hydroids (c) stele (d) hydrome. 19. Which of the following features are true about the plants with unprotected seeds? (A) Zygote development is meroblastic (B) Embryogeny is endoscopic (C) Endosperm is a post fertilization product & is triploid. (D) The number of cotyledons may be one or two or a whorl of many. (b) A & D (b) B & C (d) C & D. (a) A & C 20. In a cryptogram of virus, what does the 3rd pair stands for? (a) type of nucleic acid/number of strands in nucleic acid. (b) molecular weight of nucleic acid in million/percentage of nucleic acid in virus, (c) type of host infected/type of vector, (d) shape of virus/shape of capsid. 21. anthers monothecous & extrorse. (c) stamens polyandrous, diplostemonas with anthers dithecous & introrse. (d) stamens polyadelphous, diplostemonas with anthers dithecous & introrse. 24. Magic bullets' acts on biological agents by (A) inhibiting cell wall synthesis (B) blocking peptidoglycan synthesis (C) inhibiting protein synthesis (D) taking up lost machinery (E) destroying cell membrane. State which of the following statements are false (a) B, D, E (b) only C (c) only D (d) D & E . 25. who first of all obtained the pure culture of organisms causing the disease Bovine pleuropneumonia? (a) Louis Pasteur (b) Nowak (c) John Lister (d) Nocard & Roux. 26. A 'doughnut' is a (a) a sub-viral infectious agent containing only very low molecular weight RNA and not protein coat, (b) protein coat which is left over outside after the penetration of bacteriophage DNA. (c) complete assembly of virus particle inside the host, (d) a bacterial cell containing multiple copies of phages just before lysis. The figure represents stages in the sexual reproduction in Rhizopus. What is the phenomenon called and what • is the fate of fusion cell? (a) parasexuality & fusion cell will develop into a zoospore. (b) parasexuality & fusion cell will develop into a prothallus. (c) heterothallism fusion ceil will develop into a prothallus. (d) heterothallism fusion cell will develop into a zygospore. Which of the following is not a synonym for flowering plants as given by different botanists? (a) magnoliophyta (b) annonopsida (c) anthophyta (d) none of these. What information can be deduced from the given floral diagram about the androecium? (a) stamens monandrous, obdiplostemonas with anthers dithecous & introrse. (b) stamens polyandrous, obdiplostemonas with 27. in a F+ bacterial cell, when the F-factor unites with the main genome of the donor cell then it acts as a (a) supermale (b) superfemale (c) normal male (d) normal female. 28. in an experiment, the filaments of Spirogyra were subjected to sudden changes is temperature & pH of the medium. What will happen (a) the filaments produced azygospores & remain dormant. (b) chloroplast damaged & the filaments died soon, (c) the filaments displayed resistance to temperature & pH. (d) the filaments get fragmented & then each fragment gave rise to a new filament. 29. Which is not true for Anthocerosl (a) 1-3 celled sterile pseudoelaters are present. (b) tuberculate rhizoids & scales are absent. (c) the wall of capsule consists stomata (d) none of the above. 30. The diploid chromosome number in Pinus is 20. How.many chromosome will be present in endosperm & nucellus of Pinusl (a) 10 & 20 (b) 30 & 20 (c) 3 0 & 1 0 (d) 10 & 10 B I O L O G Y TODAY | AUGUST 08 The fossil class of gymnoperms discovered from Raj Mahal Hills in Bihar by Dr. Birbal was Shahni (a) cycadofilicales (b) pentoxylae (c) pteridospermales (d) cycadaceae. 32 (a) (b) (c) (d) dictyostele & meristele respectively. dictyostele & protostele respectively. polycydic stele & meristele respectively. solenostele & protostele respectively. Which of the following is an incorrect match? (a) Griffith - transformation - Diplococcus pneumoniae (b) Avery, Mc Carty & Mc Leod - transduction - Dipiococcus pneumoniae (c) Zinder and Lederberg - transduction - Salmonella typhineurium (d) Lederberg & Tatum - conjugation - £ coli. .33 The sexual system of classification proposed by Linnaeus in his book 'Species Plantarum' was based on (a) number, size, form & union of stamens (b) position & number of ovary (c) position of flower on the floral axis. (d) all of the above. • 34. A French botanist who classification in which 161 described was (a) George Bentham (c) B. L. de Jussieu gave a natural system of families of angiosperms were (b) (d) A. P. de Candolle Adolph Engler. 35. According to the 'Principles of phylogenetics' which of the statements is true? (a) petaliferous condition is advanced than apetalous condition (b) perigyny is primitive than hypogyny & epigyny (c) apocarpy is advanced than syncarpy (d) polycarpy is primitive than oligocarpy. 36.' Saxicaulous lichens grow on (a) bark of trees (b) (c) rocks (d) earth crust wooden items. 37. Structures in lichens that help in gaseous exchange are (a) cyphellae (b) lenticels (c) both (a) & (b) (d) none of these. 38. Which of the following is not a group containing double stranded nucleic acids? (a) reoviruses, rice dwarf virus, wound tumour virus. (b) cauliflower mosaic virus, reovirus, rice dwarf virus. (c) reoviruses, £ coli phage, cauliflower mosaic virus. (d) rice dwarf virus, wound tumour virus, cauliflower mosaic virus. The figure shows the type of stele generally present in Dryopteris & Pteris. The term designated for this particular type of stele & each stelar unit is 8 B I O L O G Y TODAY | AUGUST '08 Which of the part of strobilus is wrongly labelled? (a) megasporophyll (b) stipule (c) microsporangium (d) microsporophyll. 41. The R-factor of certain bacteria does not provide resistance against (a) sulphonamide (b) chloramphenicol (c) tetracyclines (d) none of these. 42. Which of the following is an 'indicator plant' for the chemical nature of land on which it grows (a) Polytrichum (b) lichens (c) Sphagnum (d) all of these. 43. In mosses, the male receptacle is surrounded by (a) capitate green filament called paraphyses (b) rossette of perigonial leaves (c) rossette of perichaetial leaves (d) both (a) & (b). 44. Engler & Prantl were associated with which of the following Botanical Gardens? (a) Royal Botanical Garden (b) Berlin Botanical Garden (c) Lloyd Botanical Garden (d) Indian Botanical Garden. 45. Capsule of bacteria performs which of the following functions? (a) provides protection to the bacterium against viral attack. (b) it helps the bacteriophage to attach with the bacterium during transduction. (c) it acts as osmotic barrier (d) all of the above. 46. Which of the following characteristic feature of club fungi is absent in smut & rust fungi belonging to basidiomycotina? (a) dikaryotic mycelium (b) clamp connection (c) karyogamy & meiosis occurs in basidium (d) dolipore septum 47. The difference moss is (a) exostome (b) exostome (c) exostome qroscopic (d) exostome is hygroscopic while endostome is non-hygroscopic. 48. The (a) (b) (c) (d) megasporangium of C. circinalis is largest, atropous 8c unitegmic large, atropous & unitegmic largest, orthotropous & unitegmic largest, orthotropous & ategmic, 49. The viability of spores of the plant having the largest archegonium in the plant kingdom is (a) 8-5 years (b) upto 40 years (c) 1-2 years (d) lifelong between exostome & endostome of cord 50. In Pinus, which of the following structures of the megasporophyll help in seed dispersal? (a) bract scale (b) ovuliferous scale (c) apophysis (d) wings, is hyaline while endostome is non-hyaline is non-hyaline while endostome is hyaline is non-hygroscopic while endostome is hy- Cut and send to: BIO-GENIUS Contest-5 Wl-fcS- W1-fcG- Bio-Genius Contest, 406, Taj Apartment, Ring Road, Near Safdarjung Hospital, New Delhi-110 029. (The last date of receipt of Answer Sheets is 31st August '08) Name (Mr./Miss) Age Correspondence address.. Pin Phone (with STD code) e-mail / Mobile • % in 10th & year of passing No. of questions attempted Class • No. of questions unattempted School's Name & Address Name of Coaching Institute you are attending 1. 2. 3. 5. 9. 10. ® ® ® ® ® ® ® ® ® ® © © © © © © © © © © © © © © © © © © © © © © © © © © © © © © ® ® 13. ® 14. ® ® 15. ® 16. ® 17. ® 18. ® 19. ® 11. 12. © © © © © © © © © © © © © © © © © © © © © © © © © © © © © © 21. ® © © © 31 22.® © © © 32 23. ® © © © 33 24. ® © 25. ® © 26. ® © © © © © ©© ©© 2 7 . ® © 28. © © © © 38 29. ® © © © 39 ® ® ® ® ® ® ® ® ® ® © © © © © © © © © © © © © © © © © © © © © © © © © © © © © © 4 1 . ® © © 42. ® © © © 43. ® © © © 44. ® © © © 45. ® © © © 46. ® © © © 47. ® © © © 48. ® © © © 49. ® © © © © © 50. ® © © © 40 Answer sheet other than the one printed here will not be accepted. The answer sheet may be photocopied. Mark your Answers with blue/black ball point pen. 20. © 30. ® BIOLOGY TODAYJULY0 © TESTS5 All students preparing for PMT examinations can participate in VVl^Gr Bio-Genius Contest. Answers marked only on the entry form of the magazine / photocopy of form will be accepted. More than one response to a question will be disqualified. Prizes • 1st Prize-LG Mobile phone • 2nd Prize - Adidas Bag • 3rd Prize - MTG Books (worth Rs. 500/-) The entries with maximum number of correct answers for three consecutive months (Aug'08 - 0ct'08) will be awarded 1st prize. 2nd and 3rd prize will be given to the next maximum scorers. In case of a tie, the winners will be decided through a lucky draw. The decision of the editor will be final and binding in all cases and will not be a matter for consideration of any court and no correspondence will be entertained. Name and photograph of the prize winners of this contest will be published in the December issue. MTG is not responsible for any postal delays, transit losses or mutilation of entries. Last Date The entries should reach on/before 30lh September '08 to WbfcG" Bio-Genius Contest, 406, Taj Apartment, Ring Road, Near Safdarjung Hospital, New Delhi-29. [Note; Enclosures should include a passport size photograph and a photocopy of age proof.] (a) (b) (c) (d) (1) (2) (3) (4) (5) (6) (a) (b) (c) (d) Radial symmetry is usually associated with aquatic life creeping mode of life lower grade of organisation sedentary mode of life. Match the columm I with Columm I Wheel animalcules Hairy stomach worms Jaw-moving worms Horsehair worms Moss animals Lamp shells 1 2 3 4 5 6 C D E F A D E F A B A E F D C D E C B F A columm II. Columm II. (A) Echinoderes (B) Gordius (C) Pectinatella (D) Lingula (E) Hydatina (F) Chaetonotus Match the column I with column II. Column I Column II (1) Chaga's disease (A) Noctiluca (2) Bioluminiscent protozoan (B) Ranilla (3) Group of zooids (C) Kissing bug (4) Group of cnidoblasts (5) Sea pancy (a) (b) (c) (d) 1 H C C A (D) Sagitta (E) Siboglinum (F) Lingula (G) Cnidom (H) Cormidia 2 3 4 5 A C D B A H G B A H B G C B H G (v) (a) (c) Which of the following statements is/are correct? Fasciola exhibits both alternation of generation and alternation of host. Paragonimus westermanni is commonly called hydatid worm. Infective eggs of Ascaris are immortal. The process of letting out blood by using leech is called phlebotomy. Nereis has closed circulatory system but no heart, i, v (b) i, ii, v i, ii, iii, iv (d) i, iv, v (i) Which of the following statements is/are incorrect? notochaeta is free swimming larva of some hirudinarians. (i) (ii) (iii) (iv) B I O L O G Y TODAY | SEPTEMBER '08 : (c) B C (b) Tropidonotus (d) both a and b L/codon Ophiophagus Which of the following dinosaurs is known as king of dinosaurs? (a) Diploducus (b) Tyrannosaurus (c) Iguanodon (d) Stegosaurus Bursa Fabricii is found in (a) amphibians (c) birds (b) (d) reptiles mammals Brood parasitism is found in which of the following birds? (a) Eudynamis scolopaceus (b) Passer domesticus (c) Corns splendens (d) Aptenodytes forsteri The subclass neornithes is divided into super orders on the basis of the (a) arrangement of palatal bones (b) presence or absence of keel (d) shape of the beak (c) shape of the sternum 40. Retia mirabilia is (a) net of tiny blood vessels found in some aquatic mammals, (b) net of nerve fibres found in some aquatic mammals, (c) milk producing organ in some aquatic mammals, (d) sound producing organ in some aquatic mammals. 41. Flat nose and prehensile tail are characteristic features of (b) old world monkey (d) none of these (a) new world monkey (c) both a and b Refer the given figures and choose the correct option B — Lepidosiren Neoceratodus Protopterus Neoceratodus Lepidosiren Protopterus Protopterus Lepidosiren Neoceratodus Neoceratodus Which of the following statements is false regarding heteronereis? (a) instead of living in burrows like Nereis, the heteronereis swims actively in surface water. (b) body is divisible into two distinct regions, an anterior asexual atoke and a posterior sexual epitoke. (c) parapodia of posterior sexual region become smaller and less vascularized, (d) none of these. Nephrostome is not found in (a) pharyngeal nephridia (b) integumentary nephridia (c) septal nephridia (d) both a and b (a) ^ r ^ c (a) A B C (b) A B C (c) A B C (d) A In the given figure parts labelled A, B, C, D and E are (a) A = oesophagous, B = gizzard, C = crop, D = Malpighian tubules, E = hepatic caeca (b) A = oesophagous, B = crop, C = gizzard, D = hepatic caeca, E = Malpighian tubules (c) A = oesophagous, B = crop, C = gizzard, D = hepatic caeca, E = Malpighian tubules (d) A = crop, B = oesophagous, C = gizzard, D = Malpighian tubules, E = hepatic caeca (1) (2) (3) (4) A American lung fish African lung fish Australian lung fish Australian lung fish American lung fish African lung fish American lung fish Australian lung fish African lung fish African lung fish B I O L O G Y TODAY | SEPTEMBER '08 I - Australian lung fish - American lung fish Lepidosiren Protopterus (b) (c) (d) Match the columm Column 1 Mulberry silkworm Tasar silkworm Muga silkworm Eri silkworm 1 2 3 A B C A B D C A B C B A I with columm II. Column II (A) Antheraea paphia (B) Antheraea assamamensis (C) Bombyx mori (D) Attacus rechinii 4 D C D D Holometaboly is seen in which of the following group of organisms? (a) cockroaches, grasshoppers, butterflies, beetles (b) butterflies, beetles, houseflies, honey bees (c) cockroaches, bed bugs, beetles, houseflies (d) grasshoppers, bed bugs, beetles, house flies Which of the following is kn-own as cake urchin? (a) Ciypeaster (b) Echinus (c) Ophiothrix (d) Antedon Which of the following statements is true regarding the given figure? ampulla podium (a) (b) (c) (d) pentagonal canal sucker madreporite Tiedmann's bodies it it it it represents represents represents represents canal system of sponges ambulacral system of echinoderms blood vascular system of arthropods blood vascular system of echinoderms In the given figure, which of the following is known as mother of pearl? (a) nacre (b) mantle (c) periostracum (d) prismatic layer canal radial canal periostracum prismatic layer nacre nacre secreting cells of mantle connective tissue ciliated epitheliun ^ut and send to: WUfcS- Bio-Genius Contest, 406, Taj Apartment, Ring Road, Near Safdarjung Hospital, New Delhi-110 029. 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The answer sheet may be photocopied. Mark your Answers with blue/black ball point pen. B I O L O G Y T O D A Y | SEPTEMBER '08 © © © © © © © © © © International Biology Olympiad Three lines (I, II and III) represent the relative population number of three different organisms where initially food is the only limiting factor to the carrying capacity (number of individuals). Which of the following best matches the three lines (I, II, III) with the organisms comprising each population given access to an unlimited food supply at time X ? Relative Population number The figure shows two nerve action potentials recorded intracellular^ in response to stimulating an axon. What experimental manipulation would most likely have caused the change from curve A (solid line) to curve B (dashed line)? Ml Time(milliseconds) Time I (a) Elephant (b) Mouse (c) Bacteria (d) Lichen I (a) (c) II Rabbit Tiger Rabbit Flowering plant (a) a decrease in stimulus intensity (b) a decrease in sodium concentration in the extracellular fluid (c) a decrease in the potassium concentration inside the neuron (d) the presence of a low concentration of tetrodotoxin, a sodium channel blocker III Bacteria Cricket Elephant Moss Which of the following can light microscope resolve? Chloroplasts II Nucleus III Virus particles, II only (b) I and II only I, II and III (d) neither I, II or III. Thermoregulation in mammals is a balance between heat gain and heat loss. All of the following can affect both heat gain and heat loss EXCEPT: (a) activity of the sweat glands. (b) thickness of the fat layer under the skin. (c) air movement near the body surface. (d) blood flow in the skin. What is the main target of natural selection? (a) the population (b) individual phenotype (c) individual genotype (d) individual gene (e) the species A C3 plant was grown at different temperatures: one below 28°C and one above 28°C. In which of the plants the carbon loss due to photorespiration is more (a) plant below 28°C (b) plant above 28°C (c) same for both (d) none is true. Strong emotions can lead to a condition of loss of appetite. This can by be explained Epinephrine > A following biochemical events where A represents (a) glycogenesis (b) luconeogenesis (c) glycogenolysis » reduced I B I O L O G Y TODAY | SEPTEMBER '08 Which of the following evolutionary processes are random? Gene flow ii. Mutation iii. Natural selection IV. Speciation v. Genetic drift ii (b) (a) v (d) IV, V (c) i. In a laboratory experiment, one group of people consumes an amount of pure water, a second group an equal volume of beer, and a third group an equal volume of concentrated salt solution that is hypertonic to their blood. Their urine production is monitored for several hours. At the end of the measurement period, which group will have produced the greatest volume of urine and which group the least? (a) beer the most, water the least (b) beer the most, salt solution the least (c) there will be no significant difference. (d) salt solution the most, water the least insulin secretion Suppressed _ satiety centre (d) glycolysis A certain type of grass has a diploid chromosome number of 8. A similar species of grass has a diploid chromosome number of 10. Interspecific hybridization between the two species results in sterile hybrids that can, nonetheless, reproduce vegetatively. The diploid chromosome number of these hybrids would be: (a) 9 (b) 16 (c) 18 (d) 20 Loss of appetite Answer Key 1. 6. (a) (c) : 2. 7. (b) (c) 3. 8. (a) (a) ; 4. 9. (b) (c) 5. (c) 10. (b) All students preparing for PMT examinations can participate in Bio-Genius Contest. Answers marked only on the entry form of the magazine / photocopy of form will be accepted. More than one response to a question will be disqualified. Prizes • 1st Prize - LG Mobile phone • 2nd Prize - Adidas Bag • 3rd Prize - MTG Books (worth Rs. 500/) The entries with maximum number of correct answers for three consecutive months (Aug '08 - Oct '08) will be awarded 1st prize. 2nd and 3rd prize will be given to the next maximum scorers. In case of a tie, the winners will be decided through a lucky draw. The decision of the editor will be final and binding in all cases and will not be a matter for consideration of any court and no correspondence will be entertained. Name and photograph of the prize winners of this contest will be published in the December issue. MTG is not responsible for any postal delays, transit losses or mutilation of entries. Last Date The entries should reach on/before 31st October '08 to M f c G - Bio-Genius Contest, 406, Taj Apartment, Ring Road, Near Safdarjung Hospital, New Delhi-29. [Note : Enclosures should include a passport size photograph and a photocopy of age proof.] (a) protoplasm (b) paraplasm (2) Amyloplast (3) Proteinoplast (c) organoids (d) organelles. (4) Elaioplast The non-living structures of cytoplasmic matrix is called Which ofthe following organelles is the site of biosynthesis of cellular membranes? (a) endoplasmic reticulum (b) mitochondria (c) lysosome (d) ribosome Cellulose and pectin for cell wall formation during cell division is secreted by (a) lysosome (b) dictyosome (c) endoplasmic reticulum (d) mitochondria Protein targetting is the function of (a) Golgi apparatus (b) ribosome (c) lysosome (d) peroxisome Match the Column I with Column II Column I (1) Phaeoplast Column II (A) Store fats and essential oils B I O L O G Y T O D A Y|SEPTEMBER'08 1 (a) B (b) C (C) B (d) C 6. (B) Absorbs light . (C) Produces strarch (D) Accumulates protein 2 C 3 D 4 B C B D A A A D D A Which of the following is a polymorphic cell organelles? (b) endoplasmic reticulum (d) plastid (a) lysosome (c) ribosome 7. Match the Column I with Column II Column 1 (1) Strasburger (2) Farmer (3) Plowe (4) Rhodin (5) Breidenbach Column II (A) (B) (C) (D) Glyoxisome Microbody Plasmodesmata Meiosis (E) Plasmalemma 1 (a) A (b) C (c) c (d) A 2 B 3 c 4 D 5 E D D B E B A E B A E D c (d) indirect nuclear division Match the Column I with Column II Column I Column II (1) Leptotene (A) Synapsis (2) Zygotene (B) Crossing over (3) Pachytene (C) Chiasmata formation (4) Diplotene (D) Terminalization of In which of the following cells, interphase lasts through-out the life of a person? (a) blood cells (b) nerve cells (5) Diakinesis (E) (c) sex cells Most variable phase of cell cycle is (a) G, (b) G2 (c) S (d) M (d) liver cells. The given figures show various stages of meiosis. Refer the given figures and point out the correct match chaismata 1 2 3 4 5 (a) A B C D E (b) A E B D C (c) E A B C D (d) E A B D C Bouquet stage Which of the following molecules has highest sweetening index? (a) fructose (b) sucrose (c) saccharin (d) monellin How many glucose units are found in each turn of helically twisted straight part of glycogen molecule? (a) 6 (b) 12 (c) (d) 5 10 Follicular hyperkeratosis is produced by deficiency of (a) essential amino acids (b) essential fatty acids (c) pantothenic acid (d) nicotinic acid Which of the following statements regarding cholesterol is not true? (a) it is precursor of male and female sex hormones (a) A = Diakinesis, B = Diplotene, C = Metaphase I, D = Prophase II (b) A = Diplotene, B = Diakinesis, C = Metaphase I, D = Prophase II (c) A = Diplotene, B = Diakinesis, C = Prophase II D = Metaphase I (d) A = Diakinesis, B = Diplotene, C = Prophase II D = Metaphase I Which of the following features is common in meiosis as well as mitosis (a) two successive divisions but no DNA replication prior to second division (b) crossing over and formation of chiasmata (c) separation of sister chromatids which have undergone change due to crossing over (b) it forms vitamin D on exposure to sunlight (c) it is useful in absorption of fatty acids. (d) it is a constituent of animal and plant cell wall Who among the following scientists discovered triple helical structure of collagen? (a) Fischer (b) (c) Ramachandran • (d) Hargovind Khurana Funk Which of the following statements regarding Michaelis Menten constant (K * m') is not true? (a) it indicates the substrate concentration at which the chemical reaction catalysed by an enzyme attains half its maximum velocity. (b) its value lies between 10"' to 10 -6 M (c) a high Km indicates low affinity while a low Km shows strong affinity for enzyme B I O L O G Y T O D A Y | SEPTEMBER '08 (d) if an enzyme acts on more than one substrate it shows 24. In a bacterium, the amount of adenine was found to be 18 per cent. Suggest the cytosine base composition from same K values for them. the following m 19. The given figure indicates which of the following phenomenon? (a) 64% (b) 36% (c) 32% (d) 18%. 25. Which one of the following statements is true about eukaryotic cells? (a) cycloheximide blocks elongation during translation. (b) formylated fRNA is necessary for initiation of translation. (c) a single mRNA specifies for more than one gene product. (d) erythromycin inhibits elongation during translation. 0 Km Km' [S] * 26. The lysosomes are found in large number in . (a) leucocytes (b) erythrocytes (a) effect of competitive inhibitor (c) blood platelets (d) stomach cells. (b) effect of allosteric inhibitor 27. The two subunits of ribosomes are attached to each other (c) effect of non-competitive inhibitor when the (d) effect of allosteric activator. (a) 20. Which of the following statements regarding lock and key (b) concentration of Mg + + ions in matrix is low model of enzyme action is not true? (a) it explains how a small concentration of enzyme can act upon a large amount of substrate. concentration of Mg + + ions in matrix is high (c) concentration of Fe++ ions in matrix is low (d) concentration of Fe++ ions in matrix is high. 28. Which of the following is thymine? (b) it explains how the enzyme remains unaffected at the end 0 II C of chemical reaction. (c) it explains how a substrate having a similar structure to (a) II C (b) Nf that of substrate can works as competitive inhibitor. (d) none of the above. 0' Organisms living at low temperature have high proportions of unsaturated fatty acids in their membranes, than do C=0 cells at higher temperature, in order to maintain (a) symmetry of membrane (d) (c) H N - < V C - C H (b) fluidity of membrane CH (c) transport across the membrane 0* V (d) fat-protein balance of membrane 22. Every living cell in a higher plant is connected to its living - neighbours by cytoplasmic channels, each of which is 29. Which ofthe following is not a correct diagram of molecular formula of glucose? called? (a) C 6 H 12 0 6 (a) plasmodesmata (b) desmosomes (c) dictyosomes (d) desmonemes. 23. Which of the following contiguous cells lack middle lamella? (a) all epidermal cells (b) guard and subsidiary cells (c) subsidiary cells (d) guard cells. B I O L O G Y T O D A Y | SEPTEMBER '08 (b) CH 2 OH H C — •q I /H OH H C I OH OH OH (C) 37. H H — 1 C —OH I 2C = 0 I HO— 3 C — H I H— 4 C — OH I H— 5 C — OH I H— 5 C — OH (d) all are correct. 30. The number of chiasmata in diplotene stage can be (a) 1 (b) 1 to 8 (c) 2 (d) 1 pair 31. Which of the following is a part of meiosis in the cells of seed? (a) centriole (c) cleavage furrows (b) (d) spindle both (b) & (c). 32. Minimum number of amino acids to make an enzyme is (a) (b) 50 150 (c) 500 (d) 5000. 33. Enzymes, vitamins and hormones have one thing in common (a) all are synthesized in organisms (b) all are proteins (c) all aid in regulating metabolism 34. Phospholipids on coming in contact with water arrange themselves in (b) (d) 38. Longest cell in our body is nerve fibre. The smallest cell is of (a) human egg (b) eye (c) kidney and intestine (d) blood. 39. (a) (b) (c) (d) all enhance oxidative metabolism. (a) single layer (c) precipitate What are the stuctures labelled A known as? (a) DNA strands (b) DNA loops (c). matrix (d) none of these, bilayer crystals. What is correct about cell theory? it should be modified after the discovery of cell organelles. all the cells of an organism are reproductive it is defective as all living beings do not have cellular organisation. (d) living beings are made of cells which may or may not be reproducing. 35. Which of the following forms a part of coenzymes? 40. Plasma membrane was called as cell membrane by (a) Robertson (b) Plowe (a) Zn ++ (c) Nageli and Cramer 3f (b) lipase (c) vitamin B, (d) lysine. (d) Robert hooke. . The given figure shows the flagellum of which type of 41. Consider the following statements organism? 1. In plant cells, cytokinesis starts with the formation of the phragmoplast. 2. Phragmoplast comprises interzonal microtubules and Golgi vesicles. 3. Primary cell wall is produced by microtubules. Which of the above statements are correct? (a) I and III (b) I and II (c) II and III (d) I, II and III 42. The other name for mitochondria is (a) bioblast (c) plasmosomes (b) (d) parabasal bodies all of these 43. Which of the following is a microbody? (c) Chlamydomonas (d) Fungi. (a) dictysomes (c) peroxisomes (b) (d) sarcosomes all of these B I O L O G Y T O D A Y | SEPTEMBER '08 Which of the following is known as Dahlia starch? (a) chitin (b) inuiin (c) glycogen (d) hemicellulose The number of chromosomes are "constant for a particular species" was stated by (a) Benden and Bovery (b) W.Waldeyer (c) W. Fleming (d) Sulton and Boveri. Which of the following is the function of peroxisomes? (a) synthesis of glycine (b) synthesis of serine (c) protection of cellular organelles from the toxic effects of H2O2 Which of the following pairs of bond are strongest in protein structure? peptide and disulphide bonds peptide and hydrogen bonds disulphide bond and Van der Walls interactions hydrogen bond and hydrophobic bond. (d) all of these. (a), (b) (c) (d) Secretions of cell products, e.g. proteins, etc., is facilitated by (a) mitochondria (b) Golgi-bodies (c) endoplasmic reticulum (d) chloroplasts. Reduction in the activity of succinate dehydrogenase by oxaloacetate is example of (a) competitive inhibition (b) non competitive inhibition How many protofilaments are found in a microtubule? (a). 13 (b) 10 (c) 12 (d) 11. (c) allosteric inhibition Jr- (d) none of these. Cut and send to: ffllfflnf Wl-fcG- WUfcG- Bio-Genius Contest, 406, Taj Apartment, Ring Road, Near Safdarjung Hospital, New Delhi-110 029. (The last date of receipt of Answer Sheets is 31st October '08) Name (Mr./Miss) Age Correspondence address Pin Phone (with STD code) e-mail / Mobile • % in 10th & year of passing No. of questions attempted ...... Class • No. of questions unattempted School's Name & Address Name of Coaching Institute you are attending 1. © © © © 11 © © © (3) 21. © © © © 31. © © © © 41. © © © © 2. © © © © 12. © © © © 22. © © © © 32. © © © © 42. © © © © 3. © © © © 13. © © © © 23. © © © © 33. © © © © 43. © © © © 4. © © © © 14. © © © © 24. © © © © 34. © © © © 44. © © © © 5. © © © © 15. © © © © 25. © © © © 35. © © © © 45. © © © © 6. © © © © 16. © © © © 26. © © © © 36. © © © © 46. © © © © 7. © © 17. © © 27. © © © © 37. © © © © 47. © © © © 8. 9. © © © © © © © © 18. © 19. © © © © © © © 28. © 29. © © © © © © © 38. © 39. © © © © © © © 48. © 49. © © © © © © © 10. © © © © 20. © © © © 30. © © © © 40. © © © © 50. © © © © © © © © : Answer sheet other than the one printed here will not be accepted. The answer sheet may be photocopied. Mark your Answers with blue/black ball point pen. BIOLOGY TODAY | SEPTEMBER '08 Jammu and Kashmir CET SOLVED PAPER 2008 14 The ovary after fertilization is converted into (a) embryo (b) endosperm (c) fruit (d) seed. Stem is modified into cladode in (a) Casuarina (b) Asparagus (c) Opuntia .(d) Euphorbia Verticillaster type of inflorescence is found in (a) cotton (b) Datura (c) Leucas (d) Ocimum. A simple one seeded fruit in which pericarp is fused with seed coat is (a) achene (b) caryopsis (c) cypsela (d) nut. The portion of DNA which contains information for an entire polypeptide is called as (a) cistron (b) muton (c) recon (d) operon. Bicarpellary, syncarpous ovary with axile placentation is seen in (a) solanaceae (b) caesalpinaceae (c) asteraceae (d) malvaceae. Alburnum is also called as (a) autumn wood (b) heart wood (c) sap wood (d) spring wood. The entry of pollen tube into the ovule through micropyle is called (a) porogamy (b) mesogamy (c) anisogamy (d) chalazogamy. Type of pollination in Commelina is (a) chasmogamy (b) geitonogamy (c) xenogamy (d) cleistogamy. The process of embryo formation without fertilisation is known as (a) apospory (b) apogamy (c) parthenocarpy (d) polyembryony. Cholodny - Went theory is concerned with which of the following processes (a) photomorphogenesis (b) phtoperiodism (c) phototropism (d) photorespiration The hormone present in liquid endosperm of coconut is (a) cytokinin (b) gibberellin (c) ethylene (d) auxin. The molecular formula of chlorophyll a is (a) C55H 72 0 5 N 4 Mg (b) C 55 H 70 O 5 N 4 Mg (c) C 5 5 H 7 2 0 4 N 4 Mg (d) C 50 H 72 O 5 N 4 Mg. 16. The first compound that accepts C0 2 during dark phase is (a) NADP (b) ferrodoxin (c) RuBP (d) cytochrome. 17. Initiation codon for methionine is (a) AAA (b) UUU (c) UAA (d) AUG. 18. The deficiency of this micro-nutrient results in little leaf disease . (a) copper (b) zinc (c) boron (d) iron. Kranz anatomy is a morphological diversity in the leaves of (a) C3-plants (b) C4-plants (c) both C3 and C4-plants (d) CAM plants. Prechilling treatment to break seed dormancy is (a) scarification (b) stratification (c) impaction (d) vernalization. 21. C0 2 (a) (c) The pyruvic acid formed during glycolysis is oxidised to and H 2 0 in a cycle called Calvin cycle (b) nitrogen cycle Hill reaction (d) Kreb's cycle. Respiratory quotient (RQ) is one in case of (a) fatty acids (b) nucleic acids (c) 'arbohydrates (d) organic acids. An example of free living nitrogen fixing aerobic bacteria is (a) Clostridium • (b) Rhizobium (c) Azotobacter (d) Frankia. The phytohormone which induces triple response is (a) IAA (b) ABA (c) GA3 (d) C2H4. Identify the plant belonging to the reed-swamp stage in hydrarch succession (a) Juncus (b) Sagittaria (c) Salix (d) Trapa. An example of short day plant is (a) wheat (b) maize (c) Chrysanthemum (d) radish. 25. A gas produced by paddy fields and concerned with global warming is (a) C0 2 (b) chlorine (c) H2S (d) methane. BIOLOGY TODAY | SEPTEMBER '08 26. If the stronger partner is benefitted and the weak partner is damaged, it is known as (a) predation (d) allelopathy (c) symbiosis (d) commensalism. 40. Which one of the following animals belongs to cyclostomata ? (a) Channa (b) Loris (c) Dodo (d) Petromyzon. 27. the (a) (c) 41. An egg laying mammal is (a) Didelphys (c) (c) Ornithorhynchus (d) Acid rain is mainly caused due to increase in the levels of gas(es) S0 2 only (b) C0 2 only S0 2 , C0 2 (d) I\I02 and S02 28. The flow of energy among various trophic levels of an ecosystem is (a) unidirectional (b) bidirectional (c) multidirectional (d) circular. 29. Increase in atmospheric temperature due to C0 2 is called (a) Pasteur effect (b) green-house effect (c) Blackman effect (d) Emerson effect. 30. The protective ozone layer is present in (a) ionosphere (b) stratosphere (c) troposphere (d) lithosphere. 31. Decomposition of organic matter is brought about by (a) protozoans (b) plants (c) micro-organisms (d) none of these. 32. The smallest taxon is called (a) class (b) order (c) genus (d) species. 33. Which one of the following is the first national park in India? (a). Kanha National Park (b) Periyar National Park (c) Corbett national Park (d) Bandipur National Park. 34. Which one of the following is having ssRNA? (a) TMV (b) ^-bacteriophage (c) pox virus (d) 0 x 1 7 4 . 35. In Whittaker's system of classification, prok'aryotes are placed in the kingdom (a) protista (b) monera (c) plantae (d) animalia. 36. Virus consists of (a) nucleic acid and protein (c) protein (b) nucleic acid (d) none of these. 37. This substance is present in the cell walls of Gram positive bacteria only (a) peptidoglycan (b) lipopolysaccharides (c) teichoic acid (d) none of these. 38. Highest degree of polymorphism is found in (a) protozoa (b) cnidaria (c) platyhelminthes (d) arthropoda. 39. Sea mouse belongs to phylum (a) mollusca (b) cnidaria (c) arthropoda (d) annelida. 74 BIOLOGY TODAY | DECEMBER '08 Macaca Macropus 42. In sharks, one of the following is absent (a) claspers (b) placoid scales (c) cartilaginous endoskeleton(d) air bladder. 43. The devil fish and sea hare are (a) molluscs (b) crustaceans (c) coelenterates (d) marine fish and mammal. 44. (a) (b) (c) (d) Endothelium of blood vessels is made up of simple cuboidal epithelium simple squamous epithelium simple columnar epithelium simple non-ciliated columnar epithelium. 45. In humans, sphincter of Oddi is associated with the opening of (a) hepatopancreatic ampulla.(c) pyloric stomach (c) oesophagus (d) common hepatic duct. 46/ In human beings, the duration of caridac cycle is '(a) 0.08 second (b) 0.5 second (c) 0.8 second (d) 8.0 second. 47. In which part of nephron, reabsorption of glucose is maximum from filtrate? (a) Henle's loop (b) proximal convoluted tubule (c) distal convoluted tubule (d) collecting duct. 48. Which hormone level reaches peak during luteal phase of menstrual cycle? (a) luteinizing hormone (b) progesterone (c) follicle stimulating hormone (d) estrogen. 49. The largest subunit of prokaryotic ribosomes is (a) 30 S (b) 40 S (c) 50 S (d) 60S. 50. Which of the following is a part of endomembrane system of eukaryotic ceil? (a) peroxisomes (b) chloroplasts (c) mitochondria (d) Golgi complexes. 51. Inflammation of joints due to accumulation of uric acid crystals is called as (a) gout (b) myasthenia gravis (c) osteoporosis (d) osteomalacia. 52. Chromosomes are visible with chromatids at this phase of mitosis (a) interphase . (b) prophase (c) metaphase (d) anaphase. 53. Inheritance of ABO blood grouping is an example of (a) dominance (b) co-dominance (c) incomplete dominance (d) both (a) & (b). 54. In a dihybrid cross between RRYY and rryy parents, the number of RrYy genotypes in F2 generation will be (b) 3 (c) 2 (d) 1. (a) 4 Identify a Mendelian disorder from the following (a) Down's syndrome (b) Turner's syndrome (d) Klinefelter's syndrome. (0 phenylketonuria 56 Uracil is present in RNA at the place of (a) adenine (b) guanine (c) cytosine (d) thymine. 57. Copying genetic information from one strand of DNA into RNA is (a) translation (b) transcription (d) transduction. ( 0 transformation 58 S.L. Miller's closed flask contained (a) CH4 (b) . H2 (d) all of these. (c) NH3 and water vapour Change of frequency of alleles in a population results in evolution is proposed in (a) Darwin's theory (b) Lamarck's theory (c) Hardy-Weinberg principle (d) De Vries theory. 60. Which one of the following is vestigial organ in human beings? (a) nictitating membrane (b) spleen (c) femur (d) tibia 61. The golden age of reptiles is (a) cenozoicera (b) palaeozoic era (c) mesozoic era (d) Silurian period. 62 The theory of use and disuse of organ was proposed by: (a) Darwin (b) Lamarck (c) De Vries (d) Hooker. 63 One of the following theories was proposed by Weismann (a) law of inheritance (b) theory of inheritance of acquired characters (c) theory of natural selection (d) theory of germplasm. 64. as (a) (b) (c) (d) Ontogeny recapitulates phylogeny - this theory is called biogenetic law law of embryology law of acquired characters law of Bridges. 65. The brain capacity of Homo erectus was (a) 800 to 1300 cc (b) 1650 cc (c) 650 cc (d) 1400 cc. 66. An example of innate immunity is (a) PMNL - neutrophils (b) T-lymphocytes (c) B-lymphocytes (d) TH cells. 6" Heroin is extracted from (a) Erythroxylon coca (b) Cannabis sativa (c) Papaver somniferum (d) Atropa belladona. 68. The enzyme that cuts DNA is (a) DNA - polymerase (b) DNA - ligase (c) DNA-lyase (d) restriction endonuclease. 69. In the association between two organisms, if one organism is benefitted and the other is neither benefitted nor harmed, this relationship is known as (a) predation (b) mutualism (c) commensalism (c) parasitism. 70. Opiate narcotic drugs are (a) antianxiety (b) analgesic (c) hypnotic (d) antihistamine. 71. The drug useful to increase cardiovascular effects in human beings is (a) cocaine (b) barbiturate (c) benzodiazepine (d) insulin In echolocation, the animal that produces high frequency sounds is (a) monkey (b) butterfly (c) squirrel (d) bat. 73. Two kingdoms constantly figured in all biological classifications are (a) plantae and animalia (b) monera and animalia (c) protista and animalia (d) protista and plantae. 74. The dioecious animal is (a) liverfluke (c) tapeworm (b) Aureiia (d) earthworm. 75. Comb plates are found in (a) Adamsia (b) Aureiia (c) Nereis (d) Pleurobrachia. A N S W E R S KEY 1. 7. 13. 19. 25. 31. 37. 43. 49. 55. 61. 67. 73. (b) (a) (c) (b) (d) (c) (c) (a) (c) (c) (c) (C) (a) 2. 8. 14. 20. 26. 32, 38. 44. 50. 56. 62. 68. 74. (d) (d) (c) (b) (a) (d) (b) (b) (d) (d) (b) (d) (b) 3. 9. 15. 21. ' 27. 33. 39. 45. 51. 57. 63. 69. 75. (b) (c) (a) (d) (d) (c) (d) (a) (a) (b) (d) (0 (d) 4. 10: 16. 22. 28. 34. 40. 46. . 52. 58. 64. 70. (a) (c) (c) (c) (a) (a) (d) (c) (c) (d) (a) (b) 5. 11. 17. 23. 29. 35. 41. 47. 53. 59. 65. 71. 6. 12. 18. 24. 30.' 36. 42. 48. 54. 60. 66. 72. (a) (a) (d) (c) (b) (b) (c) (b) (d) (c) (a) (a) V (c) (d) (b) (b) (b) (a) (d) (b) (a) (a) (a) (d) • • BIOLOGY TODAY | NOVEMBER '0, 3 MB PRACTICE PAPER for ••••MBIBHBnnaHpHaHMaHHMHMHaMaHIBBBHHMBHE (a) 5 PHYSICS 1. The displacement-time graph of a motion is shown in figure. The ratio of the magnitudes of the speeds during the first two seconds and the next four seconds is (a) 1 : 1 (b) 1 : 2 (c) 2 : 1 (d) 1 : 7 2 x 2 y h(l + e2) 1 x2+y2 2 3 4 5 7T7)" ( c) ^-e2> 2(1+ e 2 ) 4sR (b) J ^ R (c) JlgR (d) JlmgR A shell of mass 2m fired with a speed u at an angle 9 to the horizontal explodes at the highest point of its trajectory into two fragments of mass m each. If one fragment falls vertically, the distance at which the other fragment falls from the gun is given by u2 sin 20 3m2 sin 26 (a) (b) g 2g 2u 2 sin20 ( b ) W 7 (d) h(l+el> 2(1 -e2) A thin uniform rod AB of mass M and length L is hinged at one end A to the horizontal floor. Initially it stands vertically. It is allowed to fall freely on the floor in the vertical plane. The angular velocity of the rod when its end B strikes the floor is (a) (a) g (a) h( 1-e2) J l (b) ^ (c) (d) 2 ^ (d) 3. One end of a string of length R is tied to a stone of mass m and the other end to a small pivot on a frictionless vertical board. The stone is whirled in a vertical circle with the pivot as the centre. The minimum speed the stone must have, when it is at the topmost point on the circle, so that the string does not slack is given by (c) (d) 11 Time ( s ) — * 2 t (c) 10 A particle falls from a height h on a fixed horizontal plate and rebounds. If e is the coefficient of restitution, the total distance travelled by the particle before it stops rebounding is t A car, starting from rest, accelerates at a constant rate x for some time after which it decelerates at a constant rate y to come to rest. If the total time elapsed is t, the maximum velocity attained by the car is given by xy (a) - 2 L | (b) x+y (c) (b) 6 (d) 3M2 sin 20 g 1 A bullet loses — th of its speed in passing through a 10 wooden plank. The least number of such planks required to stop the bullet is 5. 8. A circular portion of diameter R is cut out from a uniform circular disc of mass M and radius R as shown in /-.wwwwwwCutout figure. The moment of inertia h l - \ \ \ V : : : f » \ circular of the remaining (shaded) Portion portion of the disc about an axis passing through the centre O of the disc and perpendicular to its plane is (a) —MR2 { ) 32 (c) — MR2 32 (b) W —MR2 16 (d) ImR2 8 9. The distance between the sun and the earth is r and the earth takes time T to make one complete revolution around the sun. Assuming the orbit of the earth around the sun to be circular, the mass of the sun will be proportional to r2 r2 r3 r3 (a) ~ (b)^(c) (d)p 10. A uniform sphere of mass M and radius R exerts a force F on a small mass m situated at a distance of 2R from the centre O of the sphere. A spherical portion of diameter R is cut from the sphere as shown in figure. By : MOMENTUM, 1525, Wright Town, Jabalpur (M.P.). Ph.: (0761) 2400029 BIOLOGY TODAY | SEPTEMBER '08 The force of attraction between the remaining part of the sphere and the mass m will be XjTTFnT-Tlx , s I F . - 4F (a) (c) ,, , 9- (b) ,... I F t (d) - 9 F 3 / \ \ \ \ ' R \ \ \ ] 0 \ m M p f - — X^.:::,,:.^ ^ 2R 2 17. Two different metal rods of the same length have their ends kept at the same temperatures 0! and 0 2 with 0 2 > 0J. If AL and A2 are their cross-sectional areas and kx and k2 their thermal conductivities, the rate of flow of heat in the two rods will be the same if « (a) 11. The work done to break up a drop of a liquid of radius R and surface tension a into eight drops, all of the same size, is (a) 4TICT R (c) 2 -TICTT?2 2 (b) 2 T I c R 2 (d) —TtoT?2 4 12. The volume of an air bubble is doubled as it rises from the bottom of a lake to its surface. The atmospheric pressure is 75 cm of mercury and the ratio o f t h e density of mercury to that of lake water is 40/3. What is the depth o f t h e lake? (a) 10 m (b) 15 m (c) 20 m (d) 25 m 13. At 40°C, a brass rod has a length 50 cm and a diameter 3.0 mm. It is joined to a steel rod o f t h e same length and diameter at the same temperature. What is the change in the length of the composite rod when it is heated to 240°C? The coefficients of linear expansion of brass and steel are and 2.0 x 10"5 °C-> and 1.2 x 10 5 °C"i respectively, (a) 0.28 cm (b) 0.30 cm (c) 0.32 cm (d) 0.34 cm 14. Two rods of different materials having coefficients of thermal expansion a , and a2 and Young's modulii Yl and Y2 are fixed between two rigid and massive walls. The rods are heated to the same temperature. If there is not bending of the rods, the thermal stresses developed in them are equal provided. Y, (c) JaT Y, 2L=«L 0^2 fa7 Ctj 15. 300 g of water at 25°C is added to 100 g of ice at 0°C. The final temperature of the mixture is (a) - f "C (b) -|«C (c) - 5°C (d) 0°C 16. Steam at 100°C is passed into 1.1 kg of water contained in a calorimeter of water equivalent 0.02 kg at 15°C till the temperature of the calorimeter rises to 80°C. The mass of steam condensed in kilogram is (a) 0.13 (b) 0.065 (c) 0.260 (d) 0.135 (c) A . ^ A A (b) k2 ._ Mi k2Q2 (d) A A k, A _k2Q2 A M i 18. A cylinder of radius R made of a material of thermal conductivity k, is surrounded by a cylindrical shell of inner radius R and outer radius 2R made of a material of thermal conductivity k2. The two ends of the combined system are maintained at two different temperatures. There is no loss of heat across the cylindrical surface and the system is in steady state. The effective thermal conductivity of the system is (a) kx + k2 (C) k, + 3 k2 4„ (b) (d) 3 /fc, + k2 4, 19. Two rods of different materials having coefficients of thermal expansion a , , a 2 and Young's modulii Yh Y2 respectively are fixed between two rigid massive walls. The rods are heated such that they undergo the same increase in temperature. There is no bending of the rods. If a ! : a 2 = 2 : 3, the thermal stresses developed in the two rods are equal provided 7, : Y2 is equal to (a) 2 : 3 (b) 1 : 1 (c) 3 : 2 (d) 4 : 9 20. A slab of stone of area 0.34 m 2 and thickness 10 cm is exposed on the lower face to steam at 100°C. A block of ice at 0°C rests on the upper face of the slab. In one hour, 3.6 kg of ice is melted. Assume that the heat loss from the sides is negligible. The latent heat of fusion of ice is 3.4 x 104 J kg -1 . What is the thermal conductivity of the stone in units of Js~' n r 1 (a) 1.0 (b) 1.5 (c) 2.0 (d) 2.5 21. The tungsten filament of an electric lamp has a surface area A and a power rating P. If the emissivity of the filament is £ and <5 is Stefan's constant, the steady temperature of the filament will be / r, \2 (b) T = (a) T = AEIJ AECS y \l/4 V' 2 (d) T = (c) T = AE A Aea B I O L O G Y T O D A Y I NOVEMBER '08 77 22. An ideal monoatomic gas is taken around the ABCDA cycle as shown in the P-V P* 2P, V 2P,2V diagram. The work done during the cycle is given by (see figure). (a) - •PV PV 2 (c) 2 PV PV (b) PV P, V (d) 4 PV 23. At what temperature will oxygen molecules have the same root mean square speed as hydrogen molecules at 200 K? (a) 527°C (b) 1327°C (c) 2127°C (d) 2927°C 24. Two spherical balls A and B made of the same material, are heated to the same temperature. They are then placed in identical surroundings. If the diameter of A is twice that of B, ratio of the rates of cooling of A and B will be (a) 1 : 1 (b) 2 : 1 (c) 4 : 1 (d) 1 : 4 A thin copper wire has a length L at 0°C. When heated to t°C, i-s length increases by 0.1%. If a thin copper plate of area (L x 2L) is heated through the same range of temperature, its surface area will increase by (a) 0.1% (b) 0.2% (c) 0.4% (d) 0.8% Two blocks of the same thickness and thermal conductivities k{ and k2 are placed in contact. Their outer surfaces are kept at constant temperatures T] and T2. If T2>TU and k2 > kx the temperature of the interface in the steady state will be k2T2 ~KT\ (a) (b) k 2+kj k2 kt (c) (d) k2+kx (k1-kl) 27. Two cylinders A and B fitted with pistons contain equal amounts of an ideal diatomic gas at 300 K. The piston of A is free to move, while that of B is held fixed. The same amount of heat is given to the gas in each cylinder. If the rise in temperature of the gas in A is 30 K, then the rise in temperature of the gas in B is (a) 30 K (b) 18 K (c) 50 K (d) 42 K 28. The temperature of an ideal gas is increased from 120 K to 480 K. If at 120 K, the root mean square speed of the gas molecules is v, than at 480 K it will be (a) 4 v (b) 2 v o f 29. Three rods made of the same material and having the same cross-section have been joined as shown in figure. Each rod is of the same length. The left and right ends are kept at 0°C and 90°C respectively. The temperature of the BIOLOGY TODAY | SEPTEMBER '08 junction of the three rods will be (a) 45° C (b) 60°C 0°C (c) 30°C (d) 20°C / 90°C N 90°C 30. A uniform metal rod of length L and mass M is rotating with angular speed co about an axis passing through one of the ends and perpendicular to the rod. If the temperature increases by t°C, then the change in its angular speed is proportional to (a) (b)«D (c)co 2 (d) - 31. Two masses ml and m2 are suspended together by a massless spring of force constant k (see figure). When the masses are in equilibrium, mass m l is removed without disturbing the system. The angular frequency of oscillation of mass m2 is (a) (O JV— m; (b) Jv— km 2 (d) ~2~ 32. A mass m is suspended at the end of a massless wire of length L and cross-sectional area A. If Y is the Young's modulus of the material of the wire, the frequency of oscillations along the vertical line is giver; by (a) u = 1 AL 2n V Ym ^ " 1 YA 2ti V mL .33. A sonometer wire, with a suspended mass of M = 1 kg, is in resonance with a given tuning fork. The apparatus is taken to the moon where the acceleration due to gravity is 1/6 that on earth. To obtain resonance on the moon, the value of M should be (a) 1kg (b) V6kg (c) 6 kg (d) 36 kg 34. Particle displacement (in cm) in a standing wave is given by y(x, 0 = 2 sin (0.1 7tx)cos(1007t/) The distance between a node and the next antinode is (a) 2.5 cm (b) 5.0 cm (c) 7.5 cm (d) 10.0 cm 35. A sonometer wire, 65 cm long, is in resonance with a tuning fork of frequency N. If the length of the wire is decreased by 1 cm and it is vibrated with the same tuning fork, 8 beats are heard per second. What is the value of TV? (a) 256 Hz (b) 384 Hz (c) 480 Hz (d) 512 Hz 36. Two organ pipes, each closed at one end, give 5 beats per second when emitting their fundametal notes. If their lengths are in the ratio of 50 : 51, their fundamental frequencies (in Hz) are (a) 250, 255 (b) 255, 260 (c) 260, 265 (d) 265, 270 37. Two sources A and B are sounding notes of frequency 680 Hz. A listener moves from A to B with a constant velocity u. If the speed of sound is 340 ms 4 , what must be the value of u so that he hears 10 beats per second? (a) 2.0ms- ! (b) 2.5 ms"1 (c) 3.0 ms"1 (d) 3.5 ms"1 38. An ambulance blowing a siren of frequency 700 Hz is travelling slowly towards a vertical reflecting wall with a speed of 2 ms ' . The speed of sound is 350 ms '. How many beats are heard per second? (a) 4 (b) 6 (c) 8 (d) 10 39. The speed of sound in hydrogen at STP is v. The speed of sound in a mixture containing 3 parts of hydrogen and 2 parts of oxygen at STP will be 43. In the network shown in figure, Cj = 6 |U,F and C = 9 (J.F. The equivalent capacitance between points P and Q is C ' (a) 3 |J.F C (b) 6 ]itF C (C) 9 |iF (d) 12 jiF 44. One thousand spherical water droplets, each of radius r and each carrying a charge q, coalesce to form a single spherical drop. If v is the electrical potential of each droplet and Fthat of the bigger drop, then V 1 V I (a) (b) 1000 100 (c) - = 100 (d) - = 1000 (d) (C) JTV V7 s 40. Nine tuning forks are arranged in order of increasing frequency. Each tuning fork produces 4 beats per second when sounded with either of its neighbours. If the frequency of the 9th tuning fork is twice that of the first, what is the frequency ofthe first tuning fork ? (a) 32 Hz (b) 40 Hz (c) 48 Hz (d) 56 Hz 45. Two points charges + 4q and +q are placed 30 cm apart. At what point on the line joining them is the electric field zero? (a) 15 cm from charge 4 q (b) 20 cm from charge 4 q (c) 7.5 cm from charge q (d) 5 cm from charge q One end of a massless spring of relaxed length 50 cm and spring constant k is fixed on top of a frictionless inclined plane of inclination k 8 = 30° as shown in figure. When a mass m = 1.5 kg is attached at the other end, the spring extends by 2.5 cm. The mass is displaced slightly and released. The time period (in seconds) of the resulting oscillation will be The following questions consist of two statements each : assertion (A) and Reason (R). (a) If both assertion and reason are true and reason is the correct explanation of assertion. (b) If both assertion and reason are true but reason is not the correct explanation of assertion. (c) If assertion is true but reason is false. (d) If both assertion and reason are false. (a) /(a)\ * 71 (b) 271 (d) ^ (c) * 5 7 5 A knife-edge divides a sonometer wire into two parts. The fundamental frequencies of the two parts are t^ and u 2 . The fundamental frequency of the sonometer wire when the knife-edge is removed will be 1 (b) ~(u,+v> 2 ) (a) t V ? (c) V^V (b) (d) •u, + u , ASSERTION AND REASON 46. Assertion Two persons on the surface of moon cannot talk to each other. Reason : There is no atmosphere on moon. 47 Assertion : Velocity of particles, while crossing mean position (in stationary waves) varies from maximum at antinodes to zero at nodes. Reason : Amplitude of vibration at antinodes is maximum and at nodes, the amplitude is zero, And all particles between two successive nodes cross the mean position together. Assertion : A metallic shield in form of a hollow shell may be built to block an electric field. Reason : In a hollow spherical shield, the electric field inside it is zero at every point. BIOLOGY TODAY | SEPTEMBER '08 49. Assertion : The tyres of aircraft's are slightly conducting. Reason : If a conductor is connected to ground, the extra charge induced on conductor will flow to ground Assertion : There is no current in the metals in the absence of electric field. Reason : Motion of free electron are randomly. CHEMISTRY The purity of H 2 0 2 in a given sample is 85%. Calculate the weight of impure sample of H 2 0 2 which requires 10 ml of 1 N K M n 0 4 in a titration in acidic medium? (a) 2g (b) 0.2g (c) 0.17g (d) 0.15g 52. If two gases of molecular weight Ml and M2 at temperatures Tx and T2, follow 71, M2 = T2 Mi, then which property has the same magnitude for both the gases? (a) temperature (b) pressure (c) kinetic energy per mole (d) root mean square velocity 53. The ratio between the squares of root mean square velocity of H2 at 50K and that of N 2 at 800K is (a) 4 '(b) 2 . (c) I 8 (d) ± 4 54. Which is the correct relationship? (a) E,1 of H = - E,2 of He + = - E,3 of Li2+ = - E.4 of Be3+ 2 3 4 + 2+ (b) El of H = E2 of He = E3 of Li = E4 of Be3+ (c) Ex of H = 2E 2 of He + = 3E 3 of Li2+ = 4E4 of Be 3+ (d) E, of H = of He + = of Li2+ = - E, of Be3+ 1 3 3 3 If the dipole moment of C — CI bond in the compound given below is 1.2 D. Then the resulting value of the dipole moment in CI CI and (a) (b) (c) (d) | are 1.2 D and 0.6 D respectively 0.6 D and 1.2 D respectively less than 1.2 D and more than 1.2 D respectively none of these. 56. Among the following, the molecule that is linear and has lowest dipole moment is (a) C 0 2 (b) N 0 2 (c) S 0 2 (d) C10 2 Under the same conditions how many ml of 1 M KOH and 0.5 M H 2 S0 4 solution, respectively when mixed to form a solution of total volume of 100 ml produce the BIOLOGY TODAY | SEPTEMBER '08 highest rise in temperature (a) 67/33 (b) 33/67 (c) 40/60 (d) 50/50 58. The difference in AH and AU for combustion of benzoic acid at 300 K is equal to (a) - 1.247 kJ (b) + 1.247 kJ (c) - 1.247 J (d) + 1.247 J 59. The molar heats of combustion of C 2 H 2 ( g ) , C (graphite) and H 2(g) are - 310.62, - 94.05, - 68.32 k cal respectively. The heat of formation of acetylene is (a) 54.2 kcal (b) - 54.2 kcal (c) - 68.32kcal (d) + 68.32 kcal 60. At constant pressure P, A dissociates on heating according to the equation >B(g)+C(g) 1 The equilibrium partial pressure of A at T K is - P, the equilibrium constant Kp at T K is (a) \ p 9 (b) 9 (c) 9 ll P (d) 9P 61. A certain buffer contains equal concentration of X~ and HX and Kb for J T is 10"10. The pH of buffer solution is (a) 4 (b) 7 (c) 10 (d) 14 62. The solubility of P2Q5 is x moles/dm 3 . Its'solubility product is (a) 36 JC5 (b) (64 x 104) x1 7 (c) 126jc (d) (1.25 x 10 4 )x 7 63. For the cell Reference electrode || H + | H 2 1 atm| Pt. H X = standard cell potential of reference electrode. E = e.m.f. of the cell. Then E+X 0.0591-X (b) pH = (a) P H = 0.0591 E (c) pH = X-E 0.0591 (d) pH = 0.0591 EX 64. A gas X at 1 atm is bubbled through a solution containing a mixture of 1 M 7~and 1 M Z at 25°C. If the reduction potential of Z > Y> Xthen (a) Y will oxidise X and not Z (b) Y will oxidise Z and not X (c) Y will oxidise both X and Z (d) Y will reduce both X and Z 65. 96.5 amp current is passed through molten A1C13 for 100 seconds. The volume of Cl2 gas at the electrode at STP is equal to (a) 1.12 L (b) 11200 ml (c) 11.2 L (d) 1120 ml 66. For the reaction 2 0 3 —» 30 2 , the following mechanism is suggested 0 3 § ® | 0 2 + [0] (fast-) (c) in SiO, pn -pn bond exists between Si and O (d) C 0 2 is a discrete molecule where molecular forces of attraction exist while Si0 2 is a covalent solid 0 74. Tll 3 is an ionic compound which furnishes any of the following ions. (a) Tl + and I3 (b) Tl 3 + andl 3 " 3+ (c) Tl and I (d) T l + a n d l " 3 + [0]§ffl 202 (s1ow) the rate law expression will be (a) r = £[0][0 3 ] (b) r = £[0 3 ] 2 (c) r = &[03]2 [0 2 ] _1 (d) r = A"t03]3[02]1 67. F o r r e a c t i o n A —> B, t h e r a t e c o n s t a n t kx =Axe and for the reaction P—> Q, the rate constant k2 = A2e "2 • If At = 10s, A2 = 1010 and Ea] = 600, Eai = 1200, then the temperature at which kx = k2 is (a) 600 K (b) 300 x 4.606 K 600 K ( d ) i ^ K (c) 4.606 600 68. The pyknometric density of NaCl is 2.165 x 103 kg nr 3 . while its X-ray density is 2.178 x 103 kg m r3 . The fraction of unoccupied sites in NaCl crystal is (a) 5.69 x 10-2 (b) 5.96 x 10"1 3 (c) 5.96 x io(d) 5.96 A solution ^contains 30 mole percent of A and is in equilibrium with its vapour that contains 40 mole percent of B. The ratio of vapour pressure of pure A and B will be . (a) 2 : 7 (b) 7 : 2 (c) 3 : 4 (d) 4 : 3 1.2 % solution (W/V) of NaCl is isotonic with 7.2% solution (W/V) of glucose (molar mass 180g m o H ). The degree of dissociation of NaCl solution is (a) 95 % (b) 90% (c) 100% (d) 5% On addition of one ml of solution of 10% NaCl to 10ml of red gold sol in presence of 0.025 g of starch, the coagulation is just prevented. The gold number of starch is (a) 0.025 (b) 0.25 (c) 2.5 (d) 25 72. If Ra represents the rate of decay of a radioactive disintegration reaction at time ta and Rb represents the rate of the same reaction at a later time tb. Then the average life for the radioactive disintegration reaction can be expressed as (t -th) (a) ^ =x (b) =T K In In — R, 75. When sulphur is dissolved in oleum, a deep blue coloured solution containing polyatomic sulphur cation is obtained. The formula of cation present is (a) s f (c) sf9+ (b) s f 76. Iron is rendered passive by treatment with concentrated (a) H 2 S 0 4 (b) H 3 P0 4 (c) HC1 (d) H N 0 3 77. Which of the following forms a stable oxidation states? (a) Ce3+, Yb 2+ (b) Eu2+, Tb 4+ (c) Lu 3+ , Gd 2+ (d) Pr5+, Nd 2+ Which of the following does not contain peroxide ion? (a) P b 0 2 (b) H 2 0 2 (C) Sr0 2 (d) B a 0 2 Which of the following reaction is not taking place during the extraction of Ag from Ag 2 S by cyanide process? (a) Ag 2 S + CN~ - > [Ag(CN) 2 ]- + S 2 " (b) Zn + 2[Ag(CN) 2 r [Zn(CN) 4 ] 2 " + 2 Ag I (c) Cu + 2[Ag(CN) 2 f [CU(CN) 4 ] 2 - + 2Ag I (d) S 2 - S 0 4 " + S + S2032" Arrange the following in increasing order of acidity considering 'H' atom on * carbon atoms CH = CH,CH ? = CH 7 ,C1CH 2 CH 3 , FCH2CH,,CH, - (d) T = ^ C 0 2 is a gas while Si0 2 is a solid because (a) C 0 2 is a small molecule while Si0 2 is a large molecule (b) in C 0 2 pn -pn bond exists between C and O CH 3 FCH2CH 3 CICH2CH 3 FCH2CH 3 < FCH2CH 3 2 < H C = C H (a) HC = C H < C H 7 = C H 2 < C H , - C H 3 < CICH2CH (b) C H 2 = CH < H C = C H < 2 C H 3 " CH < 3 < 3 < (c) C H 3 - C H 3 < C H , = C H , < H C = C H < CICH2CH (d) C H 3 - C H 3 < C I C H 7 C H 3 < F C H < C H (C) T = — (d) S,2; 81. 7 C H 3 = C H COOH NO, •'/ HOOC 2 3 0 2 ^S can show N BIOLOGY TODAY NOVEMBER '0: (a) geometrical isomerism (b) optical isomerism (c) both (a) and (b) (d) none of these 82. Clemmensen reduction cannot be used in which of the following O O COOH CH 3 - F, CH 3 - CI, CH 2 = C H - CH 2 - CI is (a) C H 3 - F > C H 3 - C 1 > C H 2 = C H - C H 2 - C 1 COCH, O (d) CH 2 = C H - C H 2 - C 1 > C H 3 - F > C H 3 - C 1 CH3-C-H (b) H 3 C CI C2H5 (c) (d) " CH2CH3 CI ° / — \ < ^ - C - C H Br 2 \ J Br. -> T , 'X is FeBr; O (a) // (a) {D^C_CH2A\ RS> c f > OH > SH (b) RS> SU> OH > c f (d) O H > c f > SH > RS 90. The intermediate which is not formed in benzoin condensation is O" OH j 1 1 ^C-CN •C-CN (a) H C OH I •C-CN OH | rr tLn (d) CH 3 // Br (a) CH3-NH2 > (b) CH, NHo NH cCH h 3 85. The acidic strength of methoxy phenols is (a) m > Phenol >p> o (b) m > Phenol > o>p (c) p> o> Phenol >m (d) p> o> m> Phenol 86. Which of the following is not an intermediate in Hofmann bromamide reaction ? O (a) e 91. The most reactive amine in air is O (d) e 89. Which nitrogen end takes part in the reaction with the carbonyl group when the nucleophile is NH2-NH-C-NH2? w II W M O (a) y-Nitrogen end (b) x-Nitrogen end (c) z-Nitrogen end (d) any of the nitrogen ends (c) ^ ^ C - C H , e for this reaction would be O (c) e The reactivity order of the nucleophiles SH, OH, CI, RS (c) RS> SH > c f > O f f Cf _ 88. The reaction R —L + Nu —» R —Nu + i f 9 CH2CH2CI 84" (b) CH 2 = C H - C H 2 - C 1 > C H 3 - C 1 > C H 3 - F (c) C H 3 - C 1 > C H 2 = C H - C H 2 - C 1 > C H 3 - F 83. A compound 'A' has molecular formula C5H9C1. It does not react with bromine in CC14. On treatment with strong base, it produces single compound 'B' (C 5 H 8 ) and reacts with Br 2 (aq). Ozonolysis of ' 5 ' produces a compound C 5 H 8 0 2 . Which of the following is a structure of A? CI (a) R—N=C=0 87. The reactivity order of NH. (a) (c) (c) O Br II (d) R - C - N Br R - C - N - B r O II .. (b) R - C - N BIOLOGY TODAY | SEPTEMBER '08 3\ (c) CH C H3 3 ^ N CH, 92. are (a) (b) (c) (d) Methyl-a-D-glucoside and methyl-(3-D-glucoside epimers anomers enantiomers conformational diastereomers 93. The number of atoms in furanose ring are (a) 3 6 (c) 5 (d) 7 Peptide on hydrolysis gives (a) glucose (b) fatty acids (c) amino acid (d) ribose sugar, H 3 P0 4 and base Cellulose is made of glucose units joined together by (3-1, 4-glycosidic linkages. These molecules are held by (a) ionic bonds (b) hydrogen bonds and van der Waals' forces (c) weak van der Waal's forces only (d) All of these. ASSERTION AND REASON (b) mitochondria and ribosomes (c) mitochondria and chloroplast (d) Golgi bodies and mitochondria In which of the following DNA synthesis does not occur? (a) interphase of mitotic cell cycle (b) interphase of meiotic cell cycle (c) nterkinesis of meiotic cell cycle (d) interphase of mitotic cell cycle 10 ! Azotobacter and Bacilluspolymyxci are the examples of (a) symbiotic nitrogen fixers (b) non-symbiotic nitrogen fixers (c) disease causing bacteria (d) ammonifying bacteria The following questions consist of two statements each : Ti-plasmid are present in assertion (A) and Reason (R). (a) Agrobacterium (b) Cymbidium (a) If both assertion and reason are true and reason is (c) Dendrobium (d) Syzygium the correct explanation of assertion. (b) If both assertion and reason are true but reason is not The process which destroys all living organisms is the correct explanation of assertion. , know as (c) If assertion is true but reason is false. (a) pasteurization (b) sterilization (d) If both assertion and reason are false. (c) immunization (d) sanitation Assertion : Heat of neutralization of HF is more Which one of the following antibiotics is obtained than that of HC1 by NaOH. from fungal source? Reason : HC1 is stronger acid than HF. (a) erythromycin (b) tetracyclin (c) grisiofulvin (d) chloramphenicol Assertion : In AgCl crystal Frenkel defect can be observed. 108. Early blight of potato is caused by Reason : Ag" is a small sized cation. (a) Phytophthora infestans (b) Alternaria solani Assertion : Heterolytic fission of propane forms (c) Albugo Candida ethyl carbocation and CH3 carbanion. (d) Helminthosporium oryzae Reason : Ethyl carbocation is stabilized by inductive 109.Amanita muscaria is fungus effect and CH3 is most stable carbanion. (a) used for cooking (b) used in paper industry Assertion : Benzene reacts with CO and HC1 in (c) which releases a deadly neurotoxin which can kill a presence of A1C13 to give benzaldehyde. man if consumed Reason : The electrophilic reagent formed is (d) used in making medicine H — C —• CI and it is an electrophilic substitution II 110. Yeasts are mostly O (a) obligate aerobes (b) obligate anaerobes reaction. (c) facultative aerobes (d) facultative anaerobes Assertion : KMn0 4 cannot be used as primary 111. The rate of absorption of NPK in trees having standard. mycorrhizae Reason : It is moderately soluble in water, therefore (a)increases (b) decreases its standard solution cannot be prepared. (c) remains uneffected (d) depends on temperature BIOLOGY 112. Cuscuta has Most plant cells are surrounded by cell wall but there (a) no cotyledon (b) one cotyledon are some exceptions, such as (c) two cotyledons (d) many cotyledons (a) bacteria (b) root hairs (c) gametes (d) stem hairs The smallest angiosperm is 10; Autonomic genome system is present in (a) Wolffia (b) Hydrilla (a) ribosomes and chloroplast (c) Utricularia (d) none of these BIOLOGY TODAY I NOVEMBER'08185 114 An angiosperm found in sea is (a) Ceratophyllum (b) Nymphaea (c) Eicchornia (d) Zostera 115 How much time is taken from cone formation to seed dispersal in Pinusl (a) 5 years (b) 4 years (c) 2 years (d) 1 year 116 Among the following which plant is completely devoid of roots? (a) Hydrilla (b) Vallisneria (c) Azolla (d) Ceratophyllum 117 Which of the following belongs to the category of primary consumers? (a) insects and catties (b) snakes and frogs (c) fishes ' (d) eagles 118 The forests which occur in the coastal area are (a) littoral forests (b) riparian forests (c) arid forests (d) semiarid forests 119 The molecular action of ultraviolet light is mainly reflected through (a) photodynamic action (b) formation of pyrimidine (c) destruction of hydrogen bonds between DNA (d) formation of sticky metaphase j 20. The gas that may cause depletion of ozone layer is (a) neon (b) freon (c) chlorine (d) C0 2 121 (a) (b) (c) (d) Pollution can be controlled by sewage treatment plants manufacturing electrically operated vehicles by checking atomic blasts all of these When the petiole is modified into leafy green structure, this structure is called : (a) cladode (b) phylloclade (c) phyllode (d) true leaf 123 The thorns in citrus are modifications of (a) leaf (b) root (c) stem (d) petiole 124. The chloroplasts of algae usually lack (a) grana (b) pigments (c) quantasomes (d) lamellae 125: Oxidative phosphory lation occurs during the process of (a) protein synthesis (b) N2-fixation (c) respiration (c) transpiration (c) cheaper (d) short life-cycled annual 128. Streptomycin is used to cure the diseases caused by the bacteria (a) Gram-positive (b) Gram-negative (c) Gram-neutral (d) both gram-positive and gram-negative 129.Desert can be converted into green land by (a) oxalophytes (b) psammophytes (c) halophytes (d) torpical trees 130. The trophic level of lion in a forest ecosystem is (a)T 3 (b) T4 (C)T 2 (d) T, 131 .Tropical dense forest is due to (a) high temperature and excess rain (b) low temperature and excess rain (c) high temperature and lesser rain (d) wild animals (tigers, lions, bears) 132. The Tobacco Mosaic Virus was crystalized for the •first time by (a) W.M. Stanley (b) Louis Pasteur (c) Edward Jenner (d) Andre Lwoff 133.The nitrifying bacteria are (a) autotrophic (b) saprophytic (c) parastitic (d) chemosynthetic 13< The Witches broom of legumes is caused by a (a) virus (b) mycoplasma (c) bacterium (d) fungus 135. The chief function of a gene is (a) to determine the character of a cell (b) to regulate cellular respiration (c) to assist in carbon assimilation (d) to synthesize proteins 136.Heroin is obtained from the plant of (a) poppy (b) tobacco (c) Datura (d) Cannabis sps 137.From which part of Atropa belladona the drug belladona is obtained (a) leaves (b) roots (c) stem (d) all the parts of the plant 138. Desired improved variety of economically useful crops are .raised by (a) natural selection (b) hybridization (c) mutation (d) biofertilizer 126 Photorespiration is characteristic of (a) C3 plants (b) C4 plants (c) CAM plants (d) none of these Modified antibiotics are manufactured by the technique of (a) ultrafiltration (b) ultracentrifuge (c) vernalization (d) genetic engineering The indica varieties of rice is crossed with japonica varieties as these are (a) high yeilding (b) resistant to diseases 140. Conversion of sugar into alcohol during fermentation is due to the direct action of (a) temperature (b) micro-organisms 84 B I O L O G Y T O D A Y | DECEMBER '08 (c) concentration of sugar solution (d) zymase 141 Cheese and yogurt are products of the process (a) distillation (b) pasteurization (c) fermentation (d) dehydration 14^ The R N A polymerase which brings about the synthesis of ZmRNA is (a) RNA polymerase I (b) RNA polymerase C (c) RNA polymerase II (d) RNA polymerase A 1 The operator gene of lac operon is 'turned on' when lactose molecule bind to (a) operator gene (b) repressor protein (c) promoter gene (d) m-RNA 14^ The newspaper contains one of the following toxic materials (a) Pb (b) Cd (c) Mg (d) Hg 145, W h i c h one of the f o l l o w i n g is secondary air pollutant (a) S 0 2 (b) C 0 2 (c) PAN (d) aerosol Which of the f o l l o w i n g h o r m o n e s binds with intracellular receptors? (a) thyroid hormone (b) catecholamine (c) peptide hormone (d) all of these Production, secretion and ejection of milk requires the synergistic effects of prolactin and (a) estrogen (b) progesterone (c) oxytocin (d) all of these 14! Which of the following act as secondary messenger (a) DG (b) IP 3 (c) cAMP (d) all of these 14f During mechanism of action of insulin, protein kinase C is activated by (a) PIP 2 (b) IP 3 (c) DG (d) Ca 2+ 15< The hormone which acts through intracellular receptor protein is (a) growth hormone (b) prolactin (c) thyroxine (d) adrenaline 151. The secondary messenger which shows antagonistic effect to c-AMP in heart muscle is (a) Ca 2+ (b) Inositol triphosphate (IP 3 ) (c) DAG (d) c-GMP 15/ Which of the following products diffuses into the cytoplasm triggering the release of intracellular calcium mediated processes? (a) IP3 (b) DG (c) cAMP (d) Protein kinase-A 153. "Secondary messenger" is (a) cAMP (b) ATP (c) ADP (d) DNA 154 -Which of the following is an auto-immune disease? (a) insulin-dependent diabetes mellitus (IDDM) (b) insulin independent diabetes mellitus (IIDM) (c) hashimoto's, IIDM only (d) all of these 155.Find the odd one out (a) glucocorticoids, mineralocorticoids, sexcorticoids (b) nor-epinephrine, epinephrine, adrenalin (c) relaxin, oestrogen, progestrone (d) insulin, glucagon, thymosin 156 . Which of the following activity starts with the entry of sperm into ovum of man? (a) amphimixis (b) completion of second maturation division (c) formation of gray crescent (d) all of these 157,Interleukeiun - 2 responsible for stimulating the growth of B and T lymphocytes is secreted by which of the following cells? (a) suppressor T cell (b) helper T cell (c) killer T cell (d) both helper and suppressor T cell 158, Which viruses infecting Aids disease (a) double stranded DNA virus (b) single stranded RNA virus (c) double stranded RNA vims (d) circular DNA virus 159, The placenta in man is (a) haemochorial (b) epitheliochorial (c) syndesmochorial (d) haemo-endothelial 160, The placenta in mammals is formed by (a) allantois (b) amnion (c) chorion (d) both (a) & (c) 161 Amniotic fluid comes out through vagina during which stage of parturition? (a) dilation stage (b) expulsion stage (c) after birth stage (d) none of these 162. Effect of teratogens is maximum during (a) first trimester (b) second trimester (c) third trimester (d) both (b) and (c) 163. If both the ovaries of a pregnant female are removed in the second trimester it will lead to (a) abortion (b) slow development of fetus (c) normal development (d) premature birth 164.Umbilical cord suspends embryo in amniotic cavity and is attached to the midgut region of the embryo. In eutherians, this umbilical cord is formed of the stalk of (a) yolk sac and amnion (b) allantois and chorion (c) yolk sac and chorion (d) allantois and yolk sac I B I O L O G Y T O D A Y | NOVEMBER'08187 165- Gestation period in man is about (a) 10 weeks (b) 28 weeks (c) 36 weeks (d) 38 weeks 176 Increase cardiovascular effects are caused by : (a) amphetamine + insulin (b) alcohol + aspirin (c) nicotine + cocaine (d) alcohol + antihistamine 166 Which of the following condition is not related to osteoporosis? (a) post menopausal condition (b) excessive corticosteroid treatment (c) cerebrovascular disease (d) prolonged immobility 177 Addiction to opium can lead to (a) loss of weight (b) loss of interest in work (c) hypertension (d) both (a) and (b) 167 As per the cross-linking theory, advanced glycosylated end products (AGEs) have been associated with (a) hardened arteries (b) less efficient kidney (c) stiff connective tissue (d) all of these 168. Ageing is the by-product of metabolism, it is included under (a) living theory of ageing (b) immunity theory of ageing (c) clinker theory of ageing (d) wear and tear or stress theory 169 Which of the following is the somatic mutation theory of ageing? (a) the genetic mutation accumulate resulting in deterioration and malfunctioning of cells (b) the rate of ageing and age is controlled by the ageing gene (c) environmental and hereditary factors control the ageing (d) metabolic rate affects the ageing 170 Which ofthe following mechanism is responsible for eliminating 90 percent of all the B cells made in the bone marrow, as per programmed senescence theory? (a) cross-linking (b) apoptosis (c) clonal selection (d) heteromorphosis 171. According to endocrine theory of ageing, which of the following hormones decline with age? (a) GH (b) melatonin (c) thymosin (d) all of these 172.Degenerative changes occur during (a) metamorphosis only (b) parthenogenesis (c) ageing only (d) both in metf .morphosis and ageing 173.After menopause, which of the following becomes the major source of a weaker form of estrogen? (a) ovary (b) adrenal cortex (c) adipose tissue (d) pineal 174. Which of the following statements is not true regarding physiological changes occuring during ageing? (a) loss of body fat (b) decrease in number of synapses in the brain (c) increase in the capacity of urinary bladder (d) all of these 175.After about what age, personality of a person gets stabilized? (a) 22 years (b) 30 years (c) 40 years (d) with puberty 86 B I O L O G Y T O D A Y | DECEMBER '08 178 Cirrhosis is degeneration of (a) brain (b) liver (c) lungs (d) kidney 179- A useful drag that damages gastric mucosa if taken alongwith alcohol is (a) valium (b) antihistamine (c) aspirin (d) morphine 180 All the following statements about alcohol are correct except (a) alcohol addiction causes fatty liver syndrome which leads to cirrhosis (b) alcohol addiction results in lowering of blood glucose level (c) alcohol addiction has no effect on vision (d) in liver, alcohol is converted into a more toxic compound - acetaldehyde. 181 A drunken person should not drive a vehicle because alcohol (a) increases reaction time (b) affects coordination of body parts, alertness and judgement (c) causes rashness and carelessness (d) all of these 182.The carcinogenic ingredient of tobacco smoke is (a) Nicotine (b) N-nitrosomethylene (c) CO (d) tar 183. One of the following diseases is not due to smoking (a) emphysema (b) cardio-vascular disese (c) bronchitis (d) cirrhosis 184.Emphysema is due to intake of (a) narcotics (b) heroin (c) tobacco (d) opiates 185.Tobacco smoke contains (a) carbon monoxide and polycyclic aromatic compounds (b) nicotine, carbon monoxide and tar (c) nicotine, carbon monoxide, polycyclic aromatic compounds and tar (d) nicotine, polycyclic aromatic compounds and tar 18(j,Immunodeficiency can result from which of the following? (a) gene mutation (b) IV infection (c) malnutrition (d) all of these 187.Severe combined immunodeficiency (SCID) develops due to deficiency of (a) adenosine deaminase (b) tyrosine oxidase (c) phenylalanine hydroxylase (d) (3-Galactosidase 188.Allergy mainly involves (a) histamine" (b) IgE (c) interferon (d) both (a) and (b) 189.An autoimmune disease is (a) haemophilia (b) AIDS (c) allergy (d) myasthenia gravis Reason : bulliform cells are found in the monocot leaf epidermis which are responsible for their rolling. 1 Z i d u v i d i n medicine is used for the treatment of which. of the following disease's? (a) dengue fever (b) acquired immuno deficiency syndrome (c) leukaemia (d) yellow fever ASSERTION-REASON The following questions consist of two statements each : assertion (A) and Reason (R). (a) If both assertion and reason are true and reason is the correct explanation of assertion. (b) If both assertion and reason are true but reason is not the correct explanation of assertion. (c) If assertion is true but reason is false. (d) If both assertion and reason are false. Assertion : Seeds dispersal by wind is called as anemochory. Reason : The seeds are light, minute and may be winged. 194.Assertion : In wheat and rice, bud pollination occurs. Reason : Bud pollination is a mechanism to ensure self pollination. 19? Assertion : Leaves develop chlorosis in the absence of iron. Reason : Iron is a constituent of chlorophyll. 196.Assertion : Lipid soluble materials synthesised in endoplasmic reticulum flow from ER to inner nuclear membrane. Reason : The inner and outer nuclear membranes become continuous at the edges of nuclear pores. 191 Assertion: The lysosomes maintain a pH of 5.0 Reason : H ions are pumped into lysosomal cavity by a special transport portein present in the membrane. 198.Assertion : Biological weapons are more dangerous than conventional weapons. Reason : Biological agents for biological weapons are not costly and can be produced with ease. • •Assertion : Multiple genes are group of genes located at different loci and involved in the expression of one character. They are also called cumulative genes. Reason : Cumulative gene control colour of wheat kernel, skin colour in humans and height in man. Assertion : Insulin is a type of antibiotic. Reason : It is synthesized by the process of fermentation. Assertion : Genetic engineering is also called recombinant DNA technology. Reason : It berings about improvement of genetic 193.Assertion : Monocot leaves roll to reduce the transpiration rate make up of an organism. ANSWER KEY PHYSICS 1. 11. 21. 31. 41. (c) (a) (d) (a) (a) 51. 61. 71. 81. 91. (b) (a) (d) (b) (c) •J 32. 42. (a) (a) (b) (d) (d) 3. 13. 23. 33. 43. 62. 72. 82. 92. (d) (d) (b) (b) (b) 53. 63. 73. 83. 93. 12. 22. (a) (c) (d) (c) (a) 4. 14. 24. 34. 44. (c) (d) (d) (d) (d) 54. 64. 74. 84. 94. (b) (d) (c) (b) (c) (b) (a) (a) (c) (c) I 101.(c) (b) 121.(d) 131.(a) 141.(c) 151.(d) 161.(a) 171.(d) 181.(d) 191.(a) 102.(C) 112(a) 122.(c) 132.(a) 142.(C) 152.(a) 162(a) 172.(d) 182 (b) 192.(b) 103.(C) 113.(d) 123.(C) 133.(d) 143.(b) 153.(a) 163 .(c) 173.(c) 183. (d ) 193 .(a) 104.(b) 114.(b) 124.(a) 134.(b) 144.(a) 154.(d) (b) 174.( d ) 184. ( c ) 194.(a) (a) (a) (a) (a) (a) 7. 17. 27. 37. 47. (c) (b) (d) (b) (a) 8. 18. 28. 38. 48. (c) (c) (b) (c) (a) 9. 19. 29. 39. 49. (c) (c) (b) (d) (b) 10. 20. 30. 40. 50. CHEMISTRY • 55. (d) 56. (a) 65. (a) 66. ( C ) 75. (b) 76. (d) 85. (b) 86. (d) 95. (b) 96. (b) BIOLOGY 57. 67. 77. 87. 97. (d) (c) (b) (b) (a) 58. 68. 78. 88. 98. (a) (c) (a) (c) (a) 59. 69. 79. 89. 99. (a) (b) (c) (b) (a) 60. (C) 70. (a) 80. (d) 90. ( d ) 100.(a) 109.(C) 119.( c ) (b) 139. ( d ) 149.(C) 159.(a) 169.(a) 179.(C) 189. (d ) 199 .(d) H0.(c) (b) 130.(b) 140.(d) 150.(C) (d) (b) 180.(c) 19Q.(b) 200.( a ) 5. 15. 25. 35. 45. (b) (d) (b) (d) (b) 105.(a) 115.(b) 125.(C) 135.(a) 145.(c) 155.(d) 165. (d ) 175 .(b) 185. (C ) 195.(c) 6. 16. 26. 36. 46. 106.(b) 116.(d) 126.(a) 136.(a) 146.(a) 156.(d) 166.(C) 176.(c) 186.( d ) 196.(a) 107.( C ) 117. (a) 127.(b) 137. (a) 147. (d) 157. (b) 167. (d) 177.(d) 187. (a) 197. (a) 108.(b) 118-(a) 128.(d) 138.(b) 148,(d) 158.(c) 168.(a) 178,(b) 188. (d ) 198.(b) B I O L O G Y T O D A Y | NOVEMBER '08 (a) (a) (b) (a) (a) - By Anindya S. Ghtak 1. Find the saturated fatty acid that fails to get converted totally into Acetyl-CoA molecules by (3-oxidation (a) caproic acid (b) arachidoic acid (c) valeric acid (d) all The blood buffer system is controlled by an amino acid of Hb4; its chemical nature is (a) acidic (b) basic (c) neutral (d) achiral 3. T3 hormone is derived from an amino acid that consists (b) an imidazol ring (a) an -SH group (0 two -COOH group & two -NH 2 group (d) a phenolic-OH group. 4. The relatively abundant W.B.C found in blood next to neutrophil is (a) monocyte (b) eosinophil lymphocyte (d) cyanophil. (C) 5. (i) (iii) (a) Find the components of micelles from the following protein (ii) fatty acid monoglycerides (iv) phospholipids (i),(iii) (b) (ii),(iii) (c) (i), (iv) (d) (ii),(i). 6. Scientist Von Behring worked on which kind of immunity? (b) artificial active (a) natural active (d) artificial passive. (c) natural passive 7. Which of the following diseases is not related to pituitary malfunctioning? (a) Sheehan's disease (b) panhypopituitarism (c) Larong type dwarfhism (d) virilism. Here is the absorption rate of mono-saccharides within human intestine X > Y > Z Now find the correct sequence of homo-polymers corresponding to X, Y & Z (a) agar-agar, glycogen & Inulin glycogen, agar-agar & Inulin (0 Inulin, glycogen & agar-agar (d) cellulose, inulin & agar-agar. 9. Find the justified option (i) chalice cell- columnar (ii) ependymocyte- ciliated cuboidal (iii) macula densa- columnar (iv) entero-chromaffin cell- cuboidal (b) wrong- (iii) & (iv) (a) correct- (i), (ii) & (iv) (d) correct- (i), (ii) & (iii). (c) correct- (i), (iii) & (iv) Name the muscle within eye that gets constricted by the supply of cranio-sacral autonomic nervous system (a) radial muscle (b) ciliary muscle (c) circular muscle (d) ellipsoid muscle. 11. Chief ketone body of blood is directly produced from (a) acetyl-CoA (b) acetoacetyl-CoA (c) acetoacetic acid (d) hydroxy methyl glutaryl-CoA. 12. The placental hormone HCG will give positive response to (a) Barfoed's test (b) steroid test I BIOLOGY TODAY | NOVEMBER '08 190 (c) rtinhydrin test (d) Seliwanoff's test. 13. The maximum saliva secreting salivary gland remains connected with buccal cavity by means of (a) ducts of Stensen (b) ducts of Wharton (c) duct of Rivinus • (d) ducts of Santorini. The glyco-protein hormone that increases aldosterone secretion is secreted from (a) hassle's cell (b) polkisen cell (d) signet ring cell. (c) J.G.cell 15. The highest EEG frequency originates from (b) frontal & limbic lobe (a) parietal & occipital lobe (d) frontal & parietal lobe. (c) parietal & temporal lobe 16. The single unit smooth muscle of eye is innervated by (b) pathetic nerve (a)' abducens nerve (d) spinal accessory nerve. (0 oculomotor nerve 17. 33% of pulse pressure equals to (a) M P - S P (b) SP-DP (c) S P - M P (d) MP-DP. 18. Putamen is a part of(a) grey ramus (b) substantia nigra (c) basal nuclei (d) cerebral peduncle. 19. Which ofthe following phases of cardiac cycle is of maximum time duration? (a) reduced ejection phase (b) reduced filling phase (c) Isometric relaxation period (d) first rapid filling phase. 20. 3rd heart sound takes place (a) 48 mili-seconds after diastasis (b) 32 mili-seconds before diastasis (c) 54 mili-seconds before diastasis (d) 59 mili-seconds after diastasis. 21. Out of 9 days for erythropoiesis, 7 days are needed for the maturation of (a) haemocytoblast to normocyte (b) megaloblast to reticulocyte (c) haemocytoblast to reticulocyte (d) megaloblast to normocyte. 2 2 . In the Hb4 molecule, Fe & globin molecule remains adhered by means of (a) H-bonding (b) Ionic bonding (c) Ji-dative bonding (d) vanderwaal's force. Alternative name for Vit-B7 is (a) Vit-G (b) Vit-M (c) Vit-H (d) Vit-P. Which option is correct with respect to blood urea content? (a) hepatic vein - less, renal vein - much (b) pulmonary vein - less, hepatic vein - much (c) hepatic vein - less, sub-clavian vein- much (d) renal vein - less, hepatic vein - much. 25. Specially diastolic pressure is not influenced by (a) dopamine (b) nor-adrenaline (c) serotonin (d) epinephrine. 26. In sickle cell anemia, substitution occurs in between (a) an acidic amino acid & an aromatic amino acid (b) a basic amino acid & a neutral amino acid (c) a neutral amino acid & an acidic amino acid (d) a sulphur containing amino acid & a basic amino acid. 27. The % amount of minute volume, transacted to each kidney per minute, is (a) 15-16 (b) 29-30 (c) 24-25 (d) 22-23. 28. The neuro-hormone secreted from para-ventricular nucleus of Hypothalamus, has in its chemical structure (a) 7 peptide bonds (b) 8 peptide bonds (c) 9 peptide bonds (d) 6 peptide bonds. 29. The carbohydrate responding to Seliwanoff's test, occurs in human body at (a) mammary gland (b) liver (c) seminal vesicle . (d) cerebral neurons. 30. Which option is correct on the basis of having p-1,4 linkage between two monomeric units ? (i) sucrose (ii) cellobiose (iii) maltose (iv) lactose (v) peptidoglycan (a) (i),(ii) & (v) but not (iii) & (iv) (b) (ii),(iii) & (iv) but not (i) & (v) (c) (ii),(iv) & (v) but not (i) & (iii) (d) (i),(iii) & (iv) but not (ii) & (v). 31. The enzymes of the intestinal glands act in the pH (a) 6.8 (b) 9.7 (c) 8.5 (d) 7.2. The anti-viral drug used to destroy the ds DNA Hepatitis virus, is (a) IFN-8 (b) IFN-(3 (c) IFN-a (d) IFN-y. 33. Mention the nuclear nature of the W.B.C that gives origin to microglia (a) centric (b) multi-lobular (c) eccentric (d) acro-centric. A B+ person's R.B.C surface contains (a) a single xenogenic antigen (b) two autogenic antigens (c) a single allogenic antigen (d) two autologous antigens. .''.The temperature of scrotal pouch remains normally at (a) 4° F less than normal body temp •(b) 6° F higher than normal body temp (c) 5° F higher than normal body temp (d) 7° F less than normal body temp. , Where will you be able to find oxysome? (a) myeloid body (b) neberkern (c) deutoplasm (d) nudeosome. 37. The steroidal hormone acting inversely to oxytocin, is secreted from (a) corpus cardiacum (b) corpus haemorrhagicum (c) corpus luteum (d) graafian follicle. 38. 'RAAS' acts against a hormone, chemical nature of which is (a) steroid (b) sphyngolipid (c) polypeptide (d) catecholamine. 39. In male body, the production of oestrogen takes place at (a) Leydig's cell, adrenal cortex & graafian follicle (b) liver, adrenal cortex & renal medulla (c) adrenal cortex, secondary oocyte & liver (d) liver, sustentacular cell & adrenal cortex. 40. An artificial progesterone viz. 19-nor progestin is considered to be proatherogenic; its function is to (a) lower blood LDL level (b) increase blood HDL level (c) lower blood HDL level (d) lower blood VLDL level. 41. Mention the chemical nature of the hormone & the chemical affinity of its secreting cells, by the influence of which Ovulation takes place in female body (a) protein & acidophilic (b) glycoprotein & acidophilic (c) protein & basophilic (d) glycoprotein & basophilic. 42. The amount of deutoplasm in human egg is (a) macro (b) micro (c) nil (d) moderate. 43. What is the pH difference between C.S.F & Glomerular filtrate? (a) 1.2 . (b) 1 (c) 0 (d) 1.26. 44. The main difference between epinephrine (A) & norepinephrine (NA) is that (a) NA has a -CH 3 gr. that is lacked by A (b) A has a - S H gr. that is lacked by NA (c) A has a -CH 3 gr. that is lacked by NA (d) NA has a -SH gr. that is lacked by A. 45. Expiration is related to (a) apneustic nucleus & external intercostal muscle (b) pneumotaxis nucleus & external intercostal muscle (c) apneustic nucleus & internal intercostal muscle (d) pneumotaxis nucleus & internal intercostal muscle. . 46. The portion located beneath the hardest part of our body, is secreted by (a) fibroblast (b) amyloblast (c) trichoblast (d) odontoblast. 47. The mesengial cell originates from embryonic (b) mesoderm (a) ectoderm (d) neural plate. (c) endoderm 48. The term Pericyte is related to (a) alimentary system (b) cardio-vascular system (d) excretory system. (c) nervous system 49 If a snake poison is found to be lowering BP (blood pressure) of a healthy person, then the condition of his B.M.R will (a) Increases (b) remains as before (c) decreases (d) unpredictable. 50, Find the correct option that' contains the endocrinal diseases in which blood glucose level decreases. (ii) gull's disease (i) basedow's disease (iv) addison's disease (iii) rretinism (vi) adrenal virilism (V) cushing's disease (viii) gigantism (vii) colloid goiter (b) (ii),(iv),(vi) & (vii) (a) ( i ) M ( v i ) & (viii) (d) (i),(iii),(iv)&(viii) (c) (ii),(iii),(iv) & (vii) ANSWER KEY 1. 8. 15. 22. 29. 36. 43. 50. (c) (a) (d) (c) (c) (b) (c) (c) 2. 9. 16. 23. 30. 37. 44. (b) (d) (c) (c) (c) (c) (c) 3. 10. 17. 24. 31. 38. 45. (d) (c) (d) (d) (c) (c) (d) 4. 11. 18. 25. 32. 39. 46. (c) (c) (c) (d) (c) (d) (d) 5. 12. 19. 26. 33. 40. 47. (b) (c) (b) (c) (c) (c) (b) 6. 13. 20. 27. 34. 41. 48. (d) (b) (c) (c) (c) (d) (b) I BIOLOGY TODAY | NOVEMBER '08 7. 14. 21. 28. 35. 42. 49. (d) (c) (b) (b) (d) (c) (0 •• 191 PRACTICE PAPER CBSE MAINS 2009 Topic Algae Identify the given diagram and reserved food material: In the following diagram (a) Label A, B, C; and D. (b) Write the nature of cell wall. (c) Describe few animal characters of the organism. (d) Name the types of sexual reproduction found in the organism with suitable example. Write the answers of the following questions on the basis of given diagram: (a) Label A, B, C and D (b) Identify the plant and type of sexual reproduction. (c) What is the number of daughter plants formed by 50 zygospores ? (d) What is the number of pyrenoids in each chloroplast ? Apical cell Cell wall Chloroplast Gametes Gametangium Vegetative cell Nucleus Pyrenoids Cell membrane Holdfast 4. Match the column A to column B : 0) (ii) (iii) (iv) (v) (vi) (Vii) (viii) (ix) (x) Column A Fragmentation Propagule Amylum stars Synzoospores Stolon Budding Tetraspore Exospore Carpospore Endospore By : Ashutosh Maheswari, Ambition Institute, Bhilai BIOLOGY TODAY I JANUARY '09 Column B (a) Pleurocarpa (b) Batrachospermum (c) Chaemisiphon (d) Dictyota (e) Vaucheria (f) Chara (g) Ulothrix (h) Sphacelaria (i) Protosiphon (i) Cladophora glomerata Match the column A to column B : (i) (ii) (iii) (iv) (v) Column A Lentic Epactiphytic Saphophytes Thermophytic Epiphyllophytes . Column B (a) Trentopholia (b) Oedogonium (c) Oscillatoria (d) Vaucheria (e) Botrydium (f) Protosiphon (g) Confera (h) Haplosiphon (0 Scytonema (i) Zygnema (k) Rivularia (I) Chaetophora (m) Chara 6. Explain the following terms within two lines: (b) Vacuole of algae (a) Types of flagella (d) Stigma (c) Pyrenoids (e) Type of chlorophyll and reserve food in phaeophyta (a) (b) (c) (d) (e) (f) (g) (h) (I) (j) (a) (b) (c) (d) (e) (a) Give the answer of following question in one word : Established the centre for algal studies in BHU. Book of F.E Fritsch Trigenetic life cycle is present in Chloromonadineae reproduced by Filamentous, branched, heterotrichous algae Dinoflagellates, grow profusely in the sea Non-contractile vacuole called as Nostoc equal to size of hens egg Essential condition for sexual reproduction in Spirogyra Gamete + cellwall E.g., Out of the following statements find true & false : Volvox is a colonial alga whereas Chlamydomonas is a unicellular motile alga. Resting zygospore of Ulothrix zonata forms a rhizoid like structure, this called "codiolum stage" rhizoid like structure meant for respiration. Ulothrix is not considered a linear colony of cells, because cells have plasmodesmatal connections. Spirogyra shows the presence of sexual reproduction between the contents of single cell. A plant having two types of haploid structures in its life cycle is known as haplobiontic. Such type of plant is Batrachospermum. In the given paragraph fill in the blanks: The cell wall of diatoms is contains in which silica particles are embedded in at many places due to which the cell wall appears to be made up of silica. This sillicated cell wall is called "shell" or Their cell wall is made up of two halves, which are arranged like the lids of soap box. These half parts are collectively known as In this, part which is present on the upper side acts as lid and, the known as and the other basal part is known as The place where these two parts overlaps each other is called In the cytoplasm of diatom is present, in which chlorophyll 'a' chlorophyll 'c' and pigments are present. Here storage food is and fats (oil). (a) (b) (c) (d) (e) (f) (g) (h) (i) (j) Give answer in one word : Fine processes or finger like structures develops at the base of holdfast in Ulothrix are known as.' Particles concerned with storage'of starch in Ulothrix are In favourable conditions, in Ulothrix asexual reproduction takes place by. If a total 52 cells are present in a Ulothrix filament. How many of them can divide to produce zoospores or aplanospores. How many thalli (filaments) are produced from a zygospore of Ulothrix. In Ulothrix, the common mode of asexual reproduction takes place by. Diploid, quadriflagellate structure is formed when fusing gametes first unit by their anterior ends and later on they get fused completely. This structure is known as: What will produce if Ulothrix is removed from water & placed in dry soil ? Name one lithophytic species of Ulothrix. In Ulothrix, protoplasm of cell shrinks & collects in centre and secretes thick cell wall around itself. These thick walled spores are called. Give the answer of following questions in one or two lines. (a) What is the reason that some dinoflagallates (e.g. Nocticula and Pyrosystis) show "bioluminescence"? (b) Dinoflagellates are called mesokaryote, why? (c) Why Oscillatoria can surrive in hot water streams ?. (d) Why Sargassum, Laminaria etc. algae having brown colour ? (e) Which types of algae form coral reefs and why ? ANSWERS 1. (b) (c) (d) (e) (a) Laminaria, Mannitol, Fucosan particle. Fucus, Mannitol, Fucosan particle. Volvox, true starch Ulothrix, true starch. Chara, true starch. (a) A-Apical papillae, B - Contractile vacuole, C-Volutin granule, D-Pyrenoid. (b) Glycoprotein rich in hydroxy protein (c) (i) Nature of cell wall (ii) Flagella (iii) Contractile vacuole for osmoregulatic (d) Isogamous e.g., C. media; anisogamous e.g., C. braunii, oogamous e.g., C. coccifera. (a) A - Male gamete, B - Zygospore (3 layered) BIOLOGY TODAY | JANUARY '193 17 C - Conjugation tube, D - Female gamete (b) Spirogyra, Scalariform conjugation. (c) 50 (d) Numerous generally 1 6 - 2 0 (i) - (g); (ii) - (h); (iii) - (f); (iv) - (e); (v) - (j); (vi) - (i); (vii)-(d); (viii)-(c); (ix) - (b); (x) - (a). (i)-(b),(j), (m), (k); (ii) - (b), (c); (iii)-(d), (e), (0; (iv)-(c), (g), (I) (h); (v) - (a), I (h) Nostoc punctiforme (i) N2 deficiency, alkaline pH (j) Chlamydomonas media 8 (a) True, (b) False, (c) True, (d) False (e) True. 9 Grooves and holes, frustule, theca, epitheca, hypotheca, girdle, vacuole, diploid nucleus, fucoxanthin, leucosin. Pyrenoids 51 only Haplanospores Akinete Hypnospore, 6. 7. (a) Due to presence of luciferin protein, this upon oxidation releases energy in the form of light during night. (b) Having nuclear membrane & chromosome but absence of basic protein (c) Due to presence of homopolar bonds & having complex cell wall. (d) Due to presence of chlorophyll a & c, phaeoplast, lutin fucoxanthin and violaxanthin. (e) Red alga due to deposition of calcite granule of calcium carbonate. (a) Simple, whiplash, tinsel,, haptonematic. Contractile vacuole, pseudovacuole, fucosan vesicle. (c) Protein in centre, surrounded by 5 - 7 layered starch e.g., chlorophyceae, bacillariophyceae, rhodophyceae. (d) Red orange coloured structure, present in unicellular motile algae, made up of lipid droplet & carotenoids. (e) Chlorophyll a, c, reserve food mannitol, laminarian starch. (b) (c) (d) (e) (f) (g) (a) Y. Bharawaj; Structure and Reproduction of Algae Polysiphonia, (order ceremiales) Longitudinal division Stigeoclonium, Coleochaete Gonyaulax, Gymnodinium Pusule (a) hfapetera Zoospore 4-16 Synkaryon (zoozygospores) U. implexa (b) (d) (f) (h) (j) 10. (c) (e) (g) (i) A Pioneering Indian Scientist Remembered 150th birth anniversary of J.C. Bose at Cambridge University The 150th birth anniversary of Sir Jagadish Chandra Bose was commemorated jointly by Christ's College and the World Institute of Advanced Study, New Delhi, at Christ's College, Cambridge, on December 6. Christ's, one of the oldest colleges of the University of Cambridge, has the distinction of having had on its rolls Charles Darwin, John Milton and many other distinguished achievers including J.C. Bose over the years. J.C. Bose (1858-1937) was a pioneer in the field of electromagnetic waves and is widely regarded as the first scientist who demonstrated the phenomenon of wireless transmission of electromagnetic waves. The Daily Chronicle of England noted in 1896: "J.C. Bose has transmitted signals to a distance of nearly a mile and herein lies the first and obvious and exceedingly valuable application of this new theoretical marvel. Bose was also the first to use a semi-conducting crystal as a detector of radio waves." A symposium titled" Beyond Boundaries: from Physics to Plant Sciences," was organized to mark the occasion. Also, a beautiful bust of Bose sculpted by Biman Behari Das was unveiled at the college by Indian High Commissioner Shiv Shankar Mukherjee. In his welcome remarks, Professor Frank Kelly, Master, Christ's College, recalled'the contributions J.C. Bose made to Physics and Physiology. The symposium dealt with different aspects of trans-boundary research involving both advanced physics and Sir Jagdish Chandra advanced plant physiology. Dr. E.C. George Sudarshan gave a talk on "Bose's Work on Radio Waves." In his address titled, "Green Genes to Manage Global Warming," Professor M.S. Swaminathan pointed out that Bose's work on plant response to stress and stimulus has opened up new apportunities in the area of stress physiology to develop crop varieties that are tolerant to drought, floods and salinity which are some ofthe serious consequences of climate change. His work on Mimosa and Desmodium helped establish that plants respond to stress and stimuli much the same way animals do. Bose explained why the lotus opens its petals at sunrise and closes them at sunset. His remarakable experiments endeared Bose to Rabindranath Tagore, Profulla Chandra Ray, Gopalakrishna Gokhale, Mahatma Gandhi and Sister Nivedita in India, and George Bernard Shah and Romain Rolland outside India. Professor Swaminathan referred to Bose as the Architect of the Voice of Life and pointed out how his scientific findings strengthen the view that nonviolence to nature should become a non-negotiable human ethic. This message is of contemporary relevance in the context of growing violence in the human heart. The recognition of Bose's contributions to both Physics and Physiology by his alma mater, Christ's College, is a matter of pride for all Indian scientists and other scholars, he added. Professor Swaminathan said the bust of Bose will remind generations of scholars at the University of Cambridge of the original and significant scientific findings ofthe great Indian scientist, who established the Bose Institute in Kolkata in November 1917. He was the third Indian to be elected a Fellow ofthe Royal Society, in 1920, after Ardaseer Cursetjee (1841) and Srinivasa Ramanujam (1918). Sir C. V. Raman, the fourth Indian to be thus elected, in 1924, also devoted his scientific genius in marrying physics and physiology. Christ's College will commemorate the Darwin Bicentenary on February 12,2009. Courtesy-The Hindu BIOLOGY TODAY | JANUARY'19417 MODEL TEST PAPER 1 The substance applied to the plant for reducing transpiration without causing significant effect on plant processes, such as growth and photosynthesis, is generally termed as (a) respiratory quotient (R.Q.) (b) transpiration (c) antitranspirant (d) photorespiration. 2. The whole enzyme molecule called holoenzyme is made up of a proteinaceous part and a cofactor. The proteinaceous part is called (a) prosthetic group (b) apoenzyme (c) coenzyme (d) proenzyme. 3. Which of these best shows that plant cells are totipotent? (a) protoplasmic culture for the purpose of genetic engineering of plants (b) leaf, stem and root culture for.the purpose of cell suspension cultures (c) a shoot culture for the purpose of micropropagation (d) flower meristem culture for the purpose of somatic embryos. Water is drawn into root cells because they have the higher water potential they have the lower water potential they have both essential and beneficial inorganic nutrients (d) all of the above. 4. (a) (b) (c) The reaction occurring when two molecules are joined together to form a larger molecule with the subsequent loss of a water molecule, is called (a) hydrolysis (b) condensation (c) activation energy (d) both (a) and (c). 6. Sometimes the receptacle is involved in fruit formation. Fruit formed in these cases are termed as (a) false fruits (b) true fruits but simple (c) composite fruits (d) true fruits but composite. 7. All demographic research begins with a statistical treatment of quantitative data on the population, this is called 80 BIOLOGY TODAY | JANUARY '09 (a) mortality (c) both (a) and (b) (b) fertility (d) demographic analysis. Any substance or mixture of substances which prevents, repels, destroys or mitigates any pest is known as (a) attenuation (b) epinasty (c) pesticide (d) growth hormone. Which of the following statements is/are correct regarding short day plants (SDPs)? (a) they do not have a critical photoperiod (b) they are apt to flower in the fall (c) they are the same as longday plants (d) all of the above are correct. Which one of the following plants is called 'Shepherds Purse'? (a) Capsella bursa - pastoris (b) Selaginella krausiana (c) Hypericum uralum (d) Neottia. Which part of human brain is associated with voluntary action and control? (a) limbic system (b) cerebrum (c) medulla oblongata (d) cerebellum. Which of the following is commonly known as 'Urn sponge'? (a) Monocystis (b) Leucosolenia (c) Scypha (b) none of these. Which of the following hormones is modified amino acid ? (a) estrogen (b) progesterone (c) prolactin (d) epinephrine. Chaetae is found in (a) Pheretima posthuma (c) Acerentuius (b) Bombyxmori (d) all of these. Ependymal epithelium lines the (a) neurocoel , (b) enterocoel (c) perivisceral cavity (d) all of these. Gamma-aminobutyric acid transmitter is used in (a) hindbrain only (b) midbrain only (c) forebrain only (d) both mid and forebrain. Wool-sorters disease is associated with (a) anthrax (b) asthma (c) tuberculosis (d) liver cirrhosis. 18. The males of ants, bees and wasps are (a) XIX (b) X/O (c) haploid (d) polyploid 19. Method of coelom formation within pouches of mesoderm is called (a) pseudocoely (b) schizocoely (c) enterocoely (d) all of these. Amphiblastula stage belongs to (a) sponges (b) polychaetes (c) amphibians (d) coelenterates. Which of the following is/are the significance of photosynthesis ? (a) it links the physical and biological world (b) it converts solar energy into organic matter (c) it evolves oxygen (d) all of the above. 22. (a) (c) (d) The glycolate cycle is modification of calvin cycle (b) TCA cycle oxidative pentose phosphate pathway all of the above. 23. Which group of plants has to face physiological dryness ? (a) lithophytes (b) hydrophytes (c) halophytes (d) none of these. 24. Chromosomes with median centromere having equal arms are called (a) acentric (b) metacentric (c) submetacentric (d) telocentric. The family leguminosae is divided into three sub-families on the basis of (a) corolla (b) gynoecium (c) androecium and corolla (d) aestivation of calyx and corolla. The edible part of wheat is (a) endosperm and embryo (b) accrescent sepals (c) fleshy thalamus (d) fleshy aril. During the lysogenic cycle, the phage becomes a/an (a) anaphase (b) metaphase (c) telophase (d) prophase. Which among the following is the best biofertilizer of rice crop ? (a) Rhizobium meliloti (b) Azolla pinnata (c) Bacillus polymyxa (d) Bacillus megatherium. Which ofthe following generally occurs during integration (a) (b) (c) (d) of lysogenic cycle of bacteriophage? viral DNA enters host assembly of viral components capsids combine with receptors none of the above. The forest with a multilevel understory is the (a)- tundra (b) tropical rain forest (c) temperate deciduous forest (d) coniferous forest. The Bowman's capsule of a healthy human functions as (a) suction pump (b) filter (c) bellows (d) all of these. 32. In human body pulse can be detected at the site of (a) ' radial artery (b) temporal artery (c) brachial artery (d) all of these. 33. (a) (b) (0 (d) Cavity of the viterous humour is present between the sclerotic and choroid behind the lens between the choroid and retina in front ofthe lens. How many extra-occular muscles occur in human eye? (a) 10 (b) 8 (c) 6 (d) 4. Tryptophan (Trp) operon is (a) reversible system (b) inducible system (c) repressible system (d) controlled by regulator gene The end of spinal cord in humans is called (a) funiculus (b) cauda equina (c) filum terminale (d) conus terminalis. 37. Which of the following is found only in urinary system? (a) cuboidal epithelium (b) columnar epithelium (c) squamous epithelium (d) transitional epithelium. 38. If the pH of stomach is 1.6, then which of the following enzyme will digest protein ? (a) erypsin (b) trypsin (c) pepsin (d) amylase. 39. Leather is obtained from (a) dermis (c) epidermis (b) subcutaneous layer (d) all of these. 40. The neurotransmitter serotonin, which is critical to the production and regulation of sleep is derived from the amino acid (a) methionine (b) tryptophan (c) isoleucine (d) leucine. Fiatworms have the simplest tubular excretory systems, called (a) pseudonephridia (b) protonephridia (c) metanephridia (d) none of these. 17 BIOLOGY TODAY | JANUARY'19617 A membrane is held together primarily by (a) covalent bonds (b) hydrophilic attractions (c) ionic bonds (d) hydrophobic attractions. German measles is caused by (a) papilloma virus (b) rubella virus (c) varicella virus (d) all of these. The doverleaf structure is a two dimensional description of the (a) B DNA (b) Z DNA (c) t RNA molecule (d) none of these. The random movement of identical molecules down a concentration gradient is called (a) facilitated diffusion (b) simple diffusion (c) imbibitional force (d) none of these. Achondroplasia is a disease concerned with the defect in the formation of (a) mucosa (b) cartilage (c) membrane (d) all of these. In oogenesis, the second meiotic division does not occur until (a) before fertilization (b) after fertilization (c) both (a) and (b) (d) before sperm. Which of the following is/are the vestibular apparatus of the human ear? (a) utricle (b) saccule (c) semicircular canal (d) all of these. Ketone bodies, formed in the liver, are (a) acetone (b) acetoacetic acid (c) b-hydroxybutyric acid (d) all of these. Irregularities in the initiation and conduction of impulses is called (a) heart murmur (b) atherosclerosis (c) congestive heart failure (d) arrhythmias Gene mutation occurs at the time of (a) cell division (b) DNA replication (c) DNA repair (d) RNA replication. Who among the following described mitochondria as bioplast? (a) Essau (b) Altman (c) Warburg (d) KoJIikar. The syndrome in humans in which an individuals somatic cells contain the three sex chromosomes XXX is called (a) Down's (b) Klinefelter's (c) super female (d) Turner's. Genes not located within the nucleus are almost found in the (a) cell membrane (b) cytosol (c) cytoskeleton (d) organelles. Allopatric but not sympatric speciation requires (a) geographic isolation (b) reproductive isolation (c) prior hybridization (d) spontaneous differentiation Different species residing in different geographical areas are called (a) deme (b) sympatric (c) allopatric (d) sibling species. Blind spot in an eye of human is located (a) in the middle of the lens (c) in the fovea centralis (c) where optic nerve leaves the retina (d) in the centre of the pupil 80 BIOLOGY TODAY | JANUARY '09 58. Excess of which of the following in human body is excreted in urine ? (a) water-soluble vitamins (b) fat-soluble vitamins (c) both (a) and (b) (d) none of these. If the sequence of bases in DNA is TAGC , then the sequence of bases in mRNA will be (a) AUCG (b) ATCG (c) TAGC (d) both (a) and (b). (a) (b) (c) (d) Genetic map is one that establishes sites of the genes on a chromosome establishes the various stages in gene evolution shows the stages during the cell division shows the distribution of various species in a regions Sugar is transported within the body of a plant in the form of (a) glucose (b) lactose (c) maltose (d) sucrose 62. Extra nuclear DNA is found in (a) oxysome (b) nucleus (c) golgi body (d) chloroplast During seed germination stored food in seed is mobilised by (a) gibberellin (b) nucleus (c) golgi body - (d) chloroplast. Mitochondira are yellow in colour due to the presence of (a) carotene (b) xanthophyll (c) riboflavin (d) anthocyanin. Facultative saprophyte is (a) -always parasite (b) saprophyte but acquires a parasitic mode (c) parasite but can be saprophyte (d) always saprophyte. (a) (b) (c) (d) Highest concentration of auxin occurs in xylem and phloem cells only in growing tips of plants at the base of various plant organs in leaves Competition of food, light and space is probably most severe between (a) closely related species occupying different niche (b) unrelated species occupying different niche (c) unrelated species occupying the same niche (d) closely related species occupying the same niche The region of chromosome to which the spindle fibres are attached, is called (a) chromomere (b) centromere (c) chromocentre (d) chromonemata Which of the following induces flowering in short-day plant ? (a) auxins (b) cytokinin (c) ethylene (d) gibberellin Which ofthe following induces cell division in a cell ? (a) ABA (b) auxin (c) cytokinin (d) gibberellin 'Age of cycads' is called (a) palaeozoic era (c) mesozoic era (b) early cambrian era (d) coenozoic era. 7t (a) (b) (c) (d) Phloem of angiosperm is made up of companion cells only sieve tubes and companion cells only sieve tubes only phloem parenchyma, sieve tube and companion cells. The expression of a character of a distant ancestor is called (a) isotype (b) atavism (c) microevolution (d) all of these. The pseudoelaters are found in the sporophyte of (a) Polytrichum (b) Pellia (c) Anthoceros (d) Marchantia. Which type of development occurs between the time of fertilization and the time of birth in human? (a) cortical development (b) embryological development (c) androgonial development (d) none of the above. Which of the following structures of Euglena viridis acts as a photoreceptor ? (a) nucleus (b) contractile apparatus (c) . paraflagellar body (d) paramylon. (a) (b) (c) (d) Paramecin, a poisonous substance is concerned with shell coiling in snail kappa particles of Paramecium male sterility in plants and animals all of the above. Algae found attached to rocks are called (a) coenolithic (b) epilithic (c) crustolithic (d) hydrolithic. With the help of bacteria the conversion of nitrogenous organic compounds into ammonia is called (a) nitrification (b) ammonification (c) denitrification (d) none of these. In gymnosperms the vascular rays may be composed of (a) dead parenchyma cells but not tracheids (b) living parenchyma cells (c) tracheids (d) both (b) and (c). 85. Occurrence in the same species of more than one type of individuals, which differ in form and function is known as (b) heteromorphism (a) polymorphism (c) autotrophism (d) prokaryotrophism, 'Tunica-Corpus theory' was proposed by (a) Schmidt (b) Hofmeister (c) Strasburger (d) Nageli. The genetic material ofthe retrovirus is (a) single-stranded DNA (b) double-stranded DNA (c) single-stranded RNA (d) double-stranded RNA. The concept of energy flow in an ecosystem was for the first time propounded by (a) R.Mishra (b) Teal co VJ in I / 1C 21 3( 41 5( Light intensity (Arbitary units) 51. The experiment set up shown in the adjacent diagram is (a) (b) (c) (d) for / only respiration is occurring it is only start of experiment only photosynthesis is occurring at this light intensity rate of photosynthesis equals respiration at this intensity. 55. The characteristics of C4 plants is (a) the demonstration of development of suction force due to transpiration (b) measuring the rate of transpiration (c) the demonstration of ascent of sap (d) the demonstration of anaerobic respiration. 52. Choose the correct combination of labelling in potato osmoscope. (V) (i) Kranz anatomy (ii) First product oxaloacetic acid (iii) Carboxylating enzymes are PEPco and Rubisco. (a) (i) and (ii) but not (iii) (b) (ii) and (iii) and not (i) (c) (i) and (iii) but not (ii) (d) all (i), (ii) and (iii). 56. Steps in noncyclic photophosphorylation include passage of electrons along (a) FRS —> FD —> Cyt £)e —> Cyt f —> PC —> Chi a (b) Chi a - > Cyt b e —> Cyt f—» PC PS I —> FRS —> FD (c) Chi a —> PQ —> Cyt t>6 —> Cyt f —> PC —> PSI —> FRS - > FD (d) PQ Cyt b, Cyt f-> PC —» PS I FRS FD. 57 RUBISCO content of chloroplast is (a) 20% (b) 5% (c) 11% (d) 16% 58. Which of the following happens in mitochondria? (a) (a) (i) - final level, (ii) - dot pin, (iii) - initial level, (iv) - sugar solution, (v) - potato tuber. (b) (i) - initial level, (ii) - dot pin, (iii) - final level, (iv) - water, (v) - potato tuber (c) (i)-final level, (ii)-dot pin, (iii)-initial level, (iv)-water, (v) - potato tuber 02 + ADP + H3P04 • H20 + ATP - CO, (b) 02 + ADP - H3P04- -» H20 + A M P + C02 (c) C0 2 + ADP + H 3 P0 4 - ^ U h 2 o + a m p + o2 (d) C0 2 + ADP + H 3 P0 4 . -> H 2 0 + ATP + 0 2 59. In the process of respiration in plants 180 g of glucose plus 192 g of oxygen produce I B I O L O G Y TODAY |N O V E M B E R'08 202 (a) 132 g of C0 2 , 54 g of water and 343 cal of energy (b) 264 g of C0 2 , 108 g of water and 686 cal of energy (c) 528 g of C0 2 , 216 g of water and 1372 cal of energy (d) large amount of C02, no water and no energy. 60. Who proposed that opening and closing of stomata is connected with the change in pH of guard cells? (a) Lyoyd (b) Von Mohl (c) Sayre/Scarth (d) Levitt. 61. Which one is an essential mineral, not constituent of any enzyme but stimulates the activity of many enzymes? (a) Zn (b) Mn (c) K (d) Mg. 62. Pungent principle, sinigrin, of crucifers is a (a) glycoside having sulphur (b) glycoside having cyanide (c) glycoside having special amino acids (d) tannin. 63. In an experiment a plant was dried, crushed and heated strongly in a crucible for long. The residue contained (a) oxides and carbonates of about ten elements (b) oxides and carbonates of three elements (c) carbon only (d) starch and related compounds. 64. Much of the starch is deposited in banana fruit as it matures. Which of the following explains how the starch gets there? (a) starch solution passes through cells from phloem to fruit (b) starch grains pass through cells from xylem to fruit (c) starch solution passes through companion cells to fruit (d) a sugar solution passes through phloem cells to the fruit where it is changed to starch 65. (a) (c) (d) NADP+ is hydrogen acceptor of Krebs' cycle (b) photolysis hexose monophosphate shunt both (b) and (c) 66. Which is non-enzymatic reaction in respiration? (a) phosphoglyceric acid —> PEP (b) 3-phosphoglyceraldehyde - > 1,3-diphosphoglyceraldehyde (c) pyruvic acid acetyl CoA (d) 1, 3-diphosphoglyceric acid 3-PGA. 67. Which is both C-3 and C-4 plant ? (a) sugarcane (b) maize (c) Atriplex (d) Chenopodium. 68. Another name of 'heteroauxin' isolated by Kogl from human urine is (a) IBA (b) IAA (c) NAA (d) 2,4-D. 69. How many ATP and NADPH2 molecules are needed for synthesis of one hexose molecule (glucose) in C-4 plants? (a) 12 ATP and 12 NADPH (b) 18 ATP and 12 NADPH, 86 BIOLOGY TODAY | DECEMBER '08 (c) 12 ATP and 30 NADPH2 (d) 30 ATP and 12 NADPH2. 70. Which of the following technique is employed for the separation and identification of phytohormones? (a) polarizing microsocopy (b) auto-radiography (c) gas chromatography (d) cell fractionation. 71. Flowering dependent on cold treatment is (a) cryotherapy (b) cryogenics (c) cryoscopy (d) vernalisation. 72. (a) (b) (c) (d) During anaerobic respiration in yeast H 2 0, C0 2 and energy are the only end products H2S, C 6 H 12 0 6 and energy are the end products C0 2 , C2H5OH and energy are the end products water and C0 2 are the end products. 73. How many ATP molecules should be produced from the complete oxidation of a mole of active acetate or acetyl CoA? (a) 38 ATP (b) 15 ATP (c) 12 ATP (d) 19 ATP. 74. per (a) (b) (c) (d) If C0 2 content of the atmosphere is as high as 300 parts million : the plants would not grow properly the plants would thrive well all plants would be killed plants would grow for sometime then die. What is the direction of movement of water if two cells have the some O.P. but differ in T.P.? (a) no net flow (b) from lowerT.P. to higher T.P. (c) from higher T.P. to lower T.P. (d) data insufficient. 76. Ringing (girdling) experiment cannot be performed in : (a) sugar cane (b) mango (c) Indian rubber plant (d) tecoma. 77. Nobel Prize of 1991 for discovering the single ion channels in cell was awarded to (a) Erwin Nehar and Bert Sakmann (b) Holley and Matthaei (c) Watson and H.G. Khorana (d) Nirenberg and Kornberg. 78. (a) (b) (c) (d) Presence of trichomes (hairs) on leaves helps in rapid gaseous exchange increases transpiration reduces transpiration prevents guttation. 79. When a cell transfers light energy into chemical energy then which of the following reaction would take place? (a) ATP - IP = ADP (b) ADP + IP = ATP (c) GDP + P = GTP (d) AMP + IP = ADP. 80. Which of the following concerns photophosphorylation? (a) ADP + A M P Llghtenergy (b) ADP + inorganic P04 ? AT p Li 9 htener 9y ) ATP (c) AMP + inorganic P0 4 Light energy (d) ADP + inorganic P0 4 Light energy ) ATp ? ATR 81. Cell elongation in internodal regions of the green plants takes place due to (a) cytokinins (b) gibberellins (c) ethylene (d) indole acetic acid. 82. One set of a plant was grown at 12 hours day and 12 hours night period cycles and it flowered while in the other set night phase was interrupted by flash of light and it did not produce flower. Under which one of the following categories will you place this plant? (a) darkness neutral (b) day neutral (c) short day (d) long day. 83. The mechanism of ATP formation both in chloroplasts and mitochondria is explained by (a) Relay pump theory of Godlewski (b) Much pressure/mass flow model (c) Chemiosmotic theory of Mitchell (d) Cholodney-went's model. 84. In oxidative phosphorylation, the last 3 steps are as follows Q —s> C —> aa3 02 (a) Q —> C is H + absorbing site (b) aa3 0 2 , H + yielding site (c) Q C is H + yielding site and aa3 - » 0 2 is H + absorbing site. (d) No H + is absorbed or released. 85. Photosynthesis in C4 plants is relatively less limited by atmospheric C0 2 levels because (a) effective pumping of C0 2 into bundle sheath cells (b) rubisco in C4 plants has higher affinity for C0 2 (c) four carbon acids are the primary initial C0 2 fixation products (d) the primary fixation of C0 2 is mediated via PEP carboxylase. 86. Acid concentration in CAM plants is more at (a) night (b) daytime (c) down (d) dusk. 87. (a) (c) (d) The rate limiting step in photosynthesis is 0 2 evolution (b) light reaction dark reaction C0 2 diffusion to photosynthetic site. 88. Angiosperm, to which the largest flowers belong, is (a) total stem parasite (b) partial stem parasite (c) total root parasite (d) partial root parasite. 89. Plants needed which one of the following for the fomation of ATP (a) N, Cu (b) K (c) N, P (d) N, Ca. 90. A cell when dipped in 0-5 M sucrose solution has no effect but when the same cell will be dipped in 0-5 M NaCl solution the cell will (a) increase in size (b) decrease in size (c) will be turgid (d) will get plasmolysed. 91. An innovative professor who wanted to give a live demonstration of a physiological process, filled a glass bottle with previously moistened mustard seeds and water. He screw capped the bottle and kept it away in a corner and resumed his lecture. Towards the end of his lecture, there was sudden explosion with glass pieces of bottle thrown around. Which of the following phenomena did the professor want to demonstrate? (a) diffusion (b) osmosis (c) anaerobic respiration (d) imbibition. 92. Plant cells do not rupture when placed in distilled water because (a) they are covered by impermeable cell wall (b) they are covered by a living cell wall (c) they always remain associated with other cells (d) they are covered by rigid and elastic cell wall. 93. What will be the direction of net osmotic movement of water if a solution A', enclosed in a semipermeable membrane, having an osmotic potential of ' - 3 0 ' bars and turgor pressure of '5' bars is submerged in a solution 'B' with an osmotic protential of ' - 1 0 ' bars and 'O' turgor pressure? (a) B to A (b) equal movement in both directions (c) A to B (d) no movement. 94. (a) (b) (c) Dichlorophenyl dimethyl urea (DCMU) inhibits 0 2 evolution and non-cyclic photophosphorylation promotes 0 2 evolution and non-cyclic photophosphorylation none of these (d) both (a) and (b). 95. R.Q. of sprouting potato tubers will be (a) > 1 (b) 0 (c) 1 (d)<1. 96. Several horticultural techniques are followed in the production of 'Bonsai plants'. One of them is drastic pruning of root system. Which of the following physiological factors is involved in that method? (a) inadequacy of mineral elements (b) deficiency of auxins (c) impairment of water absorption (d) deficiency of cytokinins. 97. lndole-3-acetic acid is chemically similar to be amino acid (a) proline (b) methionine (c) tryptophan (d) phenylalanine. 98. What causes a green plant to bend towards light as it grows? (a) because green plants need light to carry on photosynthesis (b) because green plants are phototropic (c) light stimulates plant cells on the lighted side to grow faster (d) auxin accumulates on shaded side stimulating greater cell elongation. I BIOLOGY TODAY|N O V E M B E R'08 204 99. Two plants are fixed in two dinostats in a horizontal ANSWER KEY What will happen? (a) in (i), roots and shoots will move upwards (b) in (i), root and stem will grow horizontal in (ii), roots and shoots will move downwards in (ii), root will move downwards and stem upwards (c) in (i), root and shoot will move downwards in (ii), root and shoot will move upwards (d) in (i), root will move downwards and stem upwards, in (ii), root will move upwards and stem downwards. 10C.Name the scientist who discovered that decapitated coleoptlie would resume photo-sensitivity and growth if severed tip is reattached through a gelatin disc, (a) Darwin (b) Van Overbeek (c) Boyson Jensen (d) Paal. Continuedfrom Page No. 81 90. Osteoclasts are associated with (a) bone regeneration (b) bone formation (c) muscle formation (d) bone breakdown. Which of the following is not correct regarding aerobic respiration ? (a) end product are ethanol and C0 2 (b) end products are C0 2 and H 2 0 (c) energy released in larger amount in the form of ATP (d) it is common in all higher plants. acid (a) (b) (c) In Kreb's cycle, citric acid is dehydrated to form cis-aconite in the presence of enzyme oxalosuccinic dehydrogenase ketoglutaric dehydrogenase succinic thiokinase (d) none of the above. When a natural predator other pathogen organism to called (a) genetic engineering (c) artificial control living being is applied on the control them, this process is 8. 15. 22. 29. 36. 43. 50. 57. 64. (b) (a) (b) (a) (d) (d) (c) (b) (d) (d) 71 78. 85. 92. !9. (d) (c) (d) (d) (b) Stomata having pores bounded by a single ring-shaped guard cells, are found in (a) pinnule of Cycas (b) capsule of Funaria (c) leaf of fern (d) all of these. 96. The 'Indian Rape Oil' is extracted from (a) Brassica campestris (b) Calophyllum inophyllum (c) Azadiracta indica (d) Sesamum indicum. I BIOLOGY TODAY |NOVEMBER'08 205 (b) 58 (a) 65 (d) 72(c) 79 (b) 86 (a) 93. (a) 100(c) 3. 10. 17. 24. 31. 38. 45. 52. 59. 66. 73. 80. (c) (b) (a) (d) (d) (c) (b) (a) (b) (b) (c) (d) (d) 94. (a) 4. (b) (d) 18. (c) (a) (d) 39. (a) 46. (d) (b) 60. (c) (c) (b) (b) 88. (c) (c) 5. 12. 19. 26. 33. 40. 47. 54. 61. 68. 75. 82. 89. 96. (a) (c) (d) (c) (d) (c) (d) (a) (c) (b) (c) (c) (c) (d) 6.. 13. 20. 27. 34. 41. 48. 55. 62. 69. 76. 83, 90. 97. (a) (d) (a) (d) (a) (c) (d) (d) (a) (d) (a) (c) (c) (c) 14. 21. 28. 35. 42. 49. 56. 63. 70. 77. 84. 91 (a) (d) (c) (b) (c) (d) (d) (d) (a) (c) (a) (c) (d) 97. A leaf initiates by periclinal divisions in a small group of cells at the side of (a) lateral meristem (b) apical meristem (c) intercalary meristem (d) none of these. The vascular bundle in which xylem and phloem lie radially side by side is called (a) radial (b) conjoint (c) concentric (d) bicollateral. Chlorophyll-a molecule at its carbon atom 3 (C-3) of the pyrrole ring III has which one of the following ? (a) carboxylic group (b) methyl group (c) aldehyde group (d) magnesium When transverse section of dicot stem is seen under microscope, the middle region is dark but outer region is light. The outer region is known as (a) annual ring (b) growth ring (c) heart wood (d) sap wood. ANSWER KEY (b) biological control (d) confusion technique. Food chains in natural conditions never operate as isolated sequences but are interconnected with each other forming some sort of interlocking pattern which is referred to as (a) grazing food chain (b) detritus food chain (c) food web (a) floristic region. (d) 9. (c) 16. Id) (d) 30 (d) 37 (a) 44. (c) 00 ai position. Clinostat (i) is rotated and clinostat (ii) is stationary. 15. 2. 29. 36, 43. 50. 57. 78 (c) (c) (a) (b) (d) (c) (c) (d) (d) (c) (c) (d) (a) (d) (b) (b) (b) (d) 23. (c) 30 (b) 37(d) 44 (b) 51 (a) 58 (a) 65. (c) • (b) 79. (b) 86 (d) >3 (b) 10O.(d) 3, (a) 10. (a) (a) (b) (b) 38. (c) 45. (d) 52. (c) (a) 66. (b) 73. (d) 80. (c) (b) (c) (b) (b) 18. (c) 25. (c) (d) 39. (a) 46. (d) (c) 50. (a) (d) 7 4 : (a) (b) (a) (b) 5. 12, 19. 26. 33. 40. 47. 54. 61. 68. 75. 82. 89. 96. (b) (c) (c) (a) (b) (b) (b) (b) (d) (b) (c) (c) (a) (a) 6. 13. 20. 27. 34. 41. 48. 55. 62. 69. 76. 83. 90. 97. (a) (d) (a) (d) (c) (b) (b) (b) (d) (d) (c) (b) (d) (b) 7 (d) 14. (a) 21 (d) (b) 35. (c) 42. (d) 49. (c) 56. (b) 63. (a) 70. (c) 77. (b) 84. (b) 91. (a) 98. (a) •• PRACTICE PAPER CBSE PRELIMS 1 The chromosome number in meiocyte of maize is: (a) . 34 (b) 20 (c) (a) (b) (c) (d) 8 (d) 12 Which one of the following statements is not correct? most of the organisms have motile male gamete and stationary female gamete. neelakuranji flowers once in 15 years. bony fishes show external fertilization. there is no natural death in single celled organism. The number of testicular lobules in testis is about (a) 350 (b) 450 (c) 250 (d) 100 (i) (ii) (iii) (iv) (a) (c) Read the following sentences: in some women the hymen persists even after coitus the glandular tissue of each breasts is divided into 40-50 mammary lobes each seminiferous tubule is lined on its inner side by single cell called male germ cells after spermiogenesis sperm heads become embedded in the Sertoli cells. Choose the correct options: v (i), (ii) & (iv) (b) (i) & (iv) (i), (iii) & (iv) (d) (i), (ii), (iii) & (iv) 5. Menstrual cycle occurs in: (a) horse (b) monkey (c) cattle (d) pig Relaxin is secreted by : (a) placenta (c) anterior pituitary (b) corpus luteum (d) ovary In human beings, which organ is formed after one month of pregnancy? (a) kidney (b) lungs (c) heart (d) limbs & digits 8. Foetal ejection reflex triggers the release of: (a) LH (b) progesterone (c) relaxin (d) oxytocin 9. (a) (c) 10. The population of India at the time of independence was approximately: (a) 450 million (b) 350 million (c) 700 million (d) none of these 11. At the present rate of population growth, the population of India would double in: (a) 36 yrs. (b) 35 yrs. (c) 33 yrs. (d) 30 yrs. 12. to a (a) (c) After parturition, lactational amenorrhoea is effective up maximum period of: eight months (b) four months two months (d) six months Which one of the following is the hormone releasing lUDs? (a) multiloed 375 (b) LNG - 20 (c) lipper loop (d) Cu 7 14. Mark the wrong statement: (a) saheli is non-steroidal in preparation (b) vaults, a female reproductive barrier is inserted into female reproductive tract to cover the cervix during coitus (c) emergency contraceptives contain the progesterone (d) spermicidal creams, jellies and foams are usually used along with cervical caps to stabilize their contraceptive efficiency Which one of the following is STD? (a) chlamydiosis (b) trichomoniasis (c) gonorrhoea (d) all of the these 16. Along with HIV, which STD is not curable? (a) genital herpes (b) genital warts (c) syphilis (d) trichomoniasis 17. (a) (b) (c) (d) Choose the incorrect match: first life on earth first non-cellular form first cellular form of life none of these 4 billion yrs ago 3 billion yrs ago 2000 million yrs ago 18. A species is able to survive in a natural selection process, In India 'Family planning' was initiated in: it means: 1951 (b) 1975 (a) it is showing a fitness to survive better in environment by 1988 (d) 2001 fighting against an opposite component. By : Ashutosh Maheswari, Ambition Institute, Bhilai I BIOLOGY TODAY|NOVEMBER'08 206 (b) it is showing a reproductive fitness, means it will leave more progeny than others. (c) it is selected by nature by choosing its special character which is necessary to survive in nature. (d) all of these (a) (b) '(c) (d) Which one of the following is the example of homology? the thorn and tendrils of Bougainvillea & Cucurbita sweet potato and potato flippers of penguin and dolphin eye of the octopus and mammals. Choose the incorrect statement: (a) man can create a new breed within hundred of years, the same could be done by nature over million of years. (b) evolution is a stochastic process based on chance events , and chance mutation in organisms. (c) evolution follows the rule of determinism, in which following steps are pre-determined. (d) evolution is based on the process of natural selection. Adaptive radiation is: (a) evolution of different species in a given geographical area starting from a point and literally radiating to other areas of ihabitats. (b) evolution of different species arises from a different habitat. (c) species can adapt itself according to the changed habitat. (d) none of these. A scientist wants to observe the process of evolution in a living organism. For this purpose what should he choose: (a) insects (b) algae (c) man (d) bacteria. Which one of the following statements is incorrect regarding the Hardy-Weinberg equilibrium? (a) allele frequencies in a population are stable and constant from generation to generation (b) sum total of all the allelic frequencies is 1 (c) change in frequency of alleles in a population is interpreted as a result of evolution (d) change in frequency of population depends only on gene migration. (A) (B) (C) (D) (E) I Match the following Ramapithecus Australopithecus Homoerectus Neanderthal Homo sapiens - (i) 75,000 - 10,000 yrs ago (ii) 15 millions years ago (iii) 1,00,000 - 40,00 yrs. ago (iv) 1.5 millions years ago (v) 2 millions years ago BIOLOGY TODAY|NOVEMBER'08 207 (a) (b) (c) (d) A (ii) (i) (iii) (ii) B (v) (ii) (iv) (iii) C . D E (iv) (iii) (i) (iii) (iv) (v) (v) (ii) (i) (i) (iv) (v) Homeostat is shown by: (a) nearly all animals and plants because it is necessary to maintain the internal environment (b) very few organisms because it is very expensive process for an organism, (c) small animals because they can easily maintain their internal environment. (d) all chordates because they have complex metabolic processes. At the high altitudes, body acclimatised itself by: increasing RBCs production increasing the capacity of Hb to bind with oxygen decreasing the capacity of Hb to bind with oxygen stimulating the respiratory centre of brain so that breathing can be enhanced. Choose the correct option (a) (i),(ii)&(iv) (b) (i), (iii) & (iv) (c) (i) & (iv) (d) (i) only. (i) (ii) (iii) (iv) Desert lizard maintains its body temperature by: (a) physiological means, in which it maintains the body temperature by increasing or decreasing the metabolic rate (b) water loss or gain by their skin. (c) it basks in the sun and absorbs heat when its body temperature drops, but moves intp shade when the ambient temperature starts increasing '(d) showing the phenomenon of diapause at unfavourable temperature. 28. Natural selection operates at: (a) sub-species level (b) species level (c) population level (d) all the levels. If in a pond there are 120 fishes last year and through reproduction 30 new fishes are added, then the birth rate will be: (a) 4 fish per year (b) 0.25 fish per year (c) 0.50 fish per year (d) 6 fish per year. 30. Choose the incorrect statement: (a) predators are used to maintain the species diversity in a community, by reducing the intensity of competition among competing prey species. (b) predators are acting as 'conduits' for energy transfer (c) in any habitat single species can not survive. (d) competition occurs only in a closely related species for the same limited source. 31. The annual net primary productivity of the land is: (a) 170 billion tons (b) 115 billion tons (c) 55 billion tons (d) 70 billion tons. 32. What is correct about the 'ecological pyramid'? (a) food web can easily be understood by this (b) any calculations of energy content, biomass or numbers has to include all organism at that trophic level (c) you can indentify the position of species in a trophic level (d) saprophytes are placed in first trophic level in pyramid. 33. Percentage of 'C' in atmosphere is: (a) 71 (b) 49 (c) 30 (d) 1 34. (a) (b) (c) (d) Superovulation means: production of yolk rich egg production.of egg which is very big in size production of more than one egg none of these. 35. Which one ofthe following is not an out breeding? (a) breeding of the unrelated animals (b) breeding between the individuals of the same breed, but having no common ancestors (c) mating of animals within the same breed, but bearing no common ancestors on either side of their pedigree up to 4-6 generations (d) inter-specific hybridisation. 36. Marine water fish used in eating is: (a) rohu (b) Catla (c) pomfrets (d) carp 37. Gene therapy for deleterious mutations in blood cells is becoming possible by introducing normal genes into blood cell into the patient. Which of the following would not be associated with this kind of gene therapy research: (a) attempting to place the normal gene in a vector which will help the gene integrate into a chromosome (b) utilising virus vectors which have some of their own genes removed (c) utilising a suitably modified HIV virus (d) preventing transmission of the mutation to the next generation. • 38, SQUID (super-conducting quantum interference device) is helpful in the study of: (a) electrical potential of different parts of brain (b) electrical potential of different parts of heart (c) weak magnetic fields in different parts of brain (d) weak magnetic fields in different parts of heart, 39. An element used in cancer therapy and also serves as a micronutrient for plant is: (a) Fe (b) Co (c) Zn (d) Ca. 40. The technique used for the identification of active genes in a cell is called : (a) southern blotting, which marks out the DNA (b) northern blotting , which marks out the RNA (c) RFLP which marks out repeated DNA sequences (d) DNA cloning, which marks out amplified DNA segments. 41. An excess supply of which of the following nutrients is the most common cause of eutrophication in freshwater lakes? (a) phosphorous (b) calcium (c) sulphur (d) potassium. 42. Pyramid of number is inverted in the case of (a) pond ecosystem (b) one tree ecosystem (c) forest ecosystem (d) both (b) and (c) 43. The best definition of an ecosystem is: (a) the inter-relationship between producers, consumers and decomposers of an environment (b) a stable co-existence of dominant species in an enviroment (c) a natural unit including plants, animals and non- living constituent of the environment (d) a number of population of organisms of different species. 44. (a) (b) (c) (d) Polyspermy refers to: formation of many sperms by a male changes in sperm nucleus penetration of many sperms into an ovum simultaneously none of these. 45. (a) (c) (d) Antifertilizin is found in: egg membrane (b) vitelline membrane middle piece of sperm the plasma membrane of anterior tip of sperm head. 46. Fertilization membrane is formed after egg activation. It is formed by the interaction of: (a) cortical granules (b) vitelline membrane (c) both (a) and (b) (d) vitelline membrane and plasma membrane. 47. Various changes in mammalian sperm which prepare it to fertilize the ovum is called: (a) differentiation (c) capacitation (b) growth (d) regeneration. BIOLOGY TODAY [ DECEMBER 08 •mimmmmt isolated the antibiotic resistance gene Blood flowing in umbilical cord of mammalian embryo is: by cutting out a piece of DNA from a plasmid which was (a) 50% maternal and 50% foetal (b) 100%foetal responsible for conferring antibiotic resistance. (c) 100% maternal (a) Paul Berg (b) Stanley Cohen and Herbert Boyer (d) 75% maternal and 25% foetal. Human placenta is derived from: (a) ectoderm (b) trophoblast (c) (d) endoderm mesoderm. Point of sperm entry forms: (a) axis of cleavage (c) (a) Escherichia coli RY 12 (b) Escherichia coli RY 13 (c) Haemophilus - P 1 (d) Haemophilus - P 2 Restriction endonuclease results in the fragments of DNA These fragments can be seperated by a technique known as: dorsal lip of blastopore Role of pacemaker is to: (c) (d) Hargobind Khorana. Eco RI comes from: (b) grey crescent (d) centre of embryo rotation. (a) increase heart beat (c) Watson (a) RIA (b) (c) „ ELISA (d) gel electrophoreris. Agarose which is natural polymer is extracted from: (b) decrease heart beat initiate heart beat (d) control blood supply to heart. chromatography (a) sea urchin (b) sea grass (c) (d) sea weeds. both (a) and (b) The separated DNA fragments can be visualized only after QRS is related to: (a) ventricular contraction (b) auricular contraction staining the DNA with compound known as: (C) cardiac cycle (d) auricular relaxation. (a) ethidium chloride (b) orange -G (c) (d) methyl orange. Scientists pinpointed the location of colour processing centres in human visual cortex by means of: ethidium bromide The first product of ancient biotechnology was: (a) PET scanning (b) NMR imaging (a) alcohol (c) CT scanning (d) Ultra-sound imaging. (c) ' insulin (b) lactic acid (d) steroid. In plasmid 'a recombinant DNA is inserted within the Which of the following does not generally affect allele coding sequence of an enzyme. This results in inactivation of frequencies in population? (a) non-random mating (b) directional selection the enzyme, which is referred to as (c) (d) immigration. (a) a - galactosidase, insertional inactivation mutation Which of the following would generally reduce the likelihood of speciation? (b) P - galactosidase, insertional activation (c) a - galactosidase, insertional inactivation (a) immigration & emigration (b) geographical isolation (d) Both (a) and (b) (c) 65. The presence of chromogenic substrate gives colonies if the plasmid in the bacteria doesn't have an insert: natural selection (d) genetic drift. Mouth parts of insects belonging to different genera show the same basic structure such as labra, mandibes, maxilla & labia, this is indicative of: (a) convergent evolution (b) divergent evolution (c) (d) punctuated equilibrium. adaptive radiation Assume that a population of diploid individuals is in Hardy-Weinberg equilibrium for a trait controlled by one locus and two alleles. If the frequency of the recessive allele is 0.8, (a) green (b) pink (c) (d) blue. red Which ion increases the efficiency with which DNA enters the bacterium through pores in its cellwall? (a) Ca 2+ (b) Mg 2+ (c) (d) Na + . K Cells are bombarded with high velocity microparticles of what is the frequency of heterozygous individuals? gold coated with DNA in a method known as: (a) 0.04 (b) 0.20 (a) biolistics (b) electric gun (c) (d) 0.32 (c) gene gun (d) both (a) and (c). 0.16 m BIOLOGY TODAY I DECEMBER '08 Taq polymerase.is isolated from a bacterium: (a) Thermus aquaticus (b) Bacillus anthracis (c) Thermus leprae (d) none of these. Which get changed with age or environment? (a) genotype (b) phenotype (c) both (a) and (b) (d) none of these. 69. Phenylketonuria is the. _ trait due to absence of an enzyme. In this phenylalanine is accumulated & converted into . Inherited traits remain discrete and never blend was suggested by: (a) Kolreuter (b) Mendel (c) Nageli (d) Darwin. (a) (b) (c) (d) autosomal dominant, pyruvic acid autosomal recessive, pyruvic acid sex linked recessive, pyruvic acid autosomal recessive, phenyl pyruvic acid. 70, (a) (b) (c) (d) In Down syndrome, the affected individual is: long statured with small round head furrowed tongue and fully open mouth physical, psychomotor and mental development is retarded all are correct, Which one of the following is not a correct match? Down's syndrome described by Langdon Down (b) Klinefelter's syndrome individual are sterile (c) Turner's syndrome ovaries are rudimentary (d) Phenylketonuria (PKU) accumulation of alanine in brain. (a) 72. (a) (b) (c) (d) Which one of the following is not correct match? 0x174 5386 nucleotide bacteriophage X 48502 bp 4.6 x 106 bp E.coli 3.6 x 109 bp haploid content of human DNA Genes (also called factors, alleles, merkmels) are the unit of information. These are stable & discrete and therefore, do not get blended as though earlier when the hereditary material was supposed to be a fluid (= blood). Who concluded that these discrete stable units are responsible for expression of traits? (a) Mendel (b) Morgan (c) Kolreuter (d) Galton 74. People who carry an allele for normal haemoglobin and an allele for sickle cell are resistant to malaria. They are example of: (a) heterozygote advantage (b) diploidy (c) out breeding (d) recessive superiority.75. Appearance of offspring resembling the remote ancestor, termed reversal to ancestral type is known as: (a) ontogeny (b) atavism (c) living fossil (d) neoteny. A piece of nucleic acid used to find the sequence of a gene by forming a hybrid with it is called: (a) retrogene (b) vector (c) probe (d) clone. Mendel could get 1 : 2 : 1 ratio due to: (a) test cross (b) F2 generation (c) F3 generation (d) R cross. 'c 80. Which is pure dihybrid? (a) Rrtt (c) TtRr (b) TTrr (d) all of these. In man brown eye is dominant over blue. A lady with brown eyes, whose father was blue eyed is married to a man with blue eyes. What percentage of her progeny will be blue eyed? (a) 0% (b) 25% (c) 100% (d) 50% Maximum number of antipodal cells are present in: (a) Sasa paniculata (b) Arestemon (c) Cuscuta (d) Saccharum. Adenine is: (a) purine (c) nucleoside (a) (b) (c) (d) (b) pyrimidine (d) nucleotide. DNA strands are antiparallel because of: H - bonds phosphodiester bonds disulphide (S-S) bonds none of these. The two strands of DNA are coiled upon itself around a common axis. These are: (a) similar in nature and antiparallel (b) different in nature (c) antiparallel and complementary (d) antiparallel but identical. (a) (b) (c) (d) Which statement is wrong about DNA? some viruses have ss DNA some viruses have ds RNA T DNA has 12 base pairs per helix length of one helix in 'B' DNA is 45A° and "T DNA is 34 A 0 . I BIOLOGY TODAY|N O V E M B E R'08 210 (a) (b) (c) (d) If DNA replicates in conservative manner then in F,, both daughter DNA molecules will be heavy one DNA molecules will be hybrid one DNA molecule will be heavy and one light none of these. How many codons in mRNA are required to code 1000 amino acids? (a) 1000 + 1 + 1 (b) 1000 (c) 1000 + 1 (d) 3000 + 1 + 1 RNA primer is must for initiation of DNA duplication. It holds the nucleotides to be added activates DNA polymerase activates RNA polymerase stops DNA duplication. A ,G 90 Which is odd among the following in terms of Y and-^ in DNA is equal to one: (a) coliphage x 174 (b) phage T2 (c) TMV (d) all of these. (a) (b) (c) (d) The method of growing micro-organisms as a thin layer on nutrient medium is called: (a) support growth system (b) suspended growth system (C) thin layer growth system (d) none of the above. In one type of -yeast fermentation, the entire medium with fermenting organism is removed from the bioreactor after reaching alcohol level of 10-12%. This process is called; (a) continuous process (b) batch process (c) synchronous culture (d) immobilised process. The main reason why antibiotics cound not solve all the problems of bacterial diseases: (a) inactivation of antibiotics of bacterial enzymes (b) decreased efficiency of the immune system (c) the development of mutant strains resistant to antibiotics (d) insensitivity of the individual following long exposure to antibiotics. Magic bullets are: (a) interferons (c) monoclonal antibodies (a) (b) (c) (d) (b) vaccines (d) antigen-antibody cells, Hybridomas are the fusion product of: normal antibody producing cell with myeloma abnormal antibody producing cell with myeloma sex cells with myeloma bone cells with myeloma. An example of pleiotropic gene is: (a) Hbs (b) HbA (c) lA (d) lB Polygenic inheritance in plants like tobacco was first studied by: 86 B I O L O G Y T O D A Y | DECEMBER '08 (a) Davenport (c) Kolreuter (b) (d) Nilsson-Ehle Galton. 98, An example of autoallopolyploidy (AAAABB) is: (a) Helianthus tuberosus (b) Rosa indica (c) Trtiticum aestivum (d) Raphanobrassica. 99. (a) (b) (c) (d) In dizygotic (fraternal) twins are formed by: one placenta and two umbilical cords two placentae and two umbilical cords one plancenta and one umbilical cord two placentae and one umbilical cord. World water conservation day is celebrated on: (a) 22nd March (b) 23rd March (c) 24th March '(d) 25th March. ANSWER KEY 1. (b) 2. (b) 3. 5. (b) 6. 8. (a) 10. (b) 11. (c) 12. (d) 13. (b) 14. (d) 15. (d) 9. (d) 16. (a) 17. (d) 18. (b) 19. (a) 20. (c) 21. (a) 22. (d) 23. (d) 24. (a) -25. (b) 26. (c) 29. (b) 30. (d) 3 1 (b) 32. (b) 33. (b) 27- (c) 28. (d) 34. (c) 35, 36. (c) 37. (d) 38. (c) •39: (d) 40. (b) 41. (a)' 42. (b) 43, (c) 44. (d) 45. (d) 46. (c) 47. (c) 48, (c) 49. (b) 50. (a) 51. (0 52. (a) 53. (a) 54. (a) 55. (a) (c) 57. (d) 58. (b) 59. (b) 60. (d) 61. (d) 62. (c) 63. (a) 64. (a) 65. (d) 66. (a) 67. (d) 68. (a) 69. (d) 70. (c) 71. (d) 72. (d) 73. (a) 74. (a) (a) 78. (c) 79. (c) 80. (c) 81. (d) 82. (b) .76. (b) 77. (a) 83. (a) 84. 85. (0 86. (d) 87.' (c) 88. (a) 89. (a) 90. (c) (b) 92. (a) 93. (c) 96. (a) 97. (c) 99. (b) 100 (a) (a) •1 it! 94. (c) 4. (b) (c) 95. (a) (d) 7. (c) (c) (b) years (1994-2007) Chapterwise AIIMS mmBm&wSi AIIMS wUM PHYSICS I CHEMISTRY I BIOLOGY Available at leading book-shops throughout India. MTG BOOKS 503, Taj Apt., Ring Road Near Safdarjung Hospital New Delhi - 1 1 0 029 Tel.: 26191601, 26194317 Mammary glands are modified (a) cutaneous glands (b) sebaceous glands (c) sweat glands (d) scent glands. (a) (c) Cells of liver which act as phagocytes are Deiter cells (b) Kupffer cells Hensen cells (d) acinar cells. Which of following are metabolic wastes of protein metabolism? (a) urea, oxygen and N 2 (b) urea, NH3 and C0 2 (c) ammonia, urea and creatinine (d) nitrogen, urea and C0 2 . Which blood vessel in mammals would normally carry largest amount of urea? (a) renal artery (b) hepatic vein (c) renal vein (d) hepatic portal vein. Blood does not clot inside blood vessels due to the presence of (a) heparin (b) fibrinogen (c) vitamin K (d) thrombin. Golden rice is a transgenic crop of future with following improved trait (a) insect resistance (b) high lysine content (c) high protein content (d) high vitamin A content. Which of the following is a pair of biofertilizer? (a) Nostoc and legume (b) Rhizobium and grasses (c) Azoiia and blue green algae (d) Salmonella and Escherichia coli. Foolish seedling disease of rice led to the discovery of (a) abscisic acid (b) cytokinin (c) 2,4-D (d) gibberellin. At maturity, which of the following is non-nudeated? (a) palisade cell (b) sieve cell (c) companion cell (d) cortical cell. Which of the following is a free living N2 fixing bacteria? (a) Nostoc (b) Nitrosomonas (c) Azotobacter (d) Rhizobium. 'Black rust of wheat' is caused by (a) Albugo (b) Ustiiago (c) (d) Puccinia colourblind. The genotype of their offsprings are (a) all sons colourblind (b)' 50% daughters colourblind (c) all daughters are normal (d) all daughters are colourblind. Base composition in RNA is A +T = G + C (b) A + G = T + C A+ U= G+ C (d) A + G = U + C. Malignant tertian malaria is caused by Plasmodium malariae (b) Plasmodium ovale Plasmodium vivax (d) Plasmodium falciparum. Reserpine drug is obtained from which part of Rauwolfia serpentina? (a) rhizome (b) aerial stem (c) root (d) all of these. Marsh gas mainly contains (a) S0 2 (b) C0 2 (c) CH4 (d) H 2 0. (a) (c) 15. (a) (c) Development of female gametophyte directly from megaspore mother cell without meiosis is called (a) apogamy (b) apospory (c) syngamy (d) parthenocarpy. (a) (b) (c) (d) Which enzyme is used as 'molecular scissor' in genetic engineering? (a) restriction endonuclease(b) DNA ploymerase (c) DNA ligase (d) DNAgyrase. AIDS virus causes reduction in (a) cytotoxic T cells (b) helper T cells (c) suppressor T cells (d) both (a) and (b). In Hamburger's phenomenon, which ion is transported? (a) Mg++ (b) Na + (c) CI" (d) K + . Most hazardous metal pollutant of automobile exhaust is (a) Pb (b) Hg (c) Cd (d) Cu. Phytophthora. 12 XO is representative of Which one ofthe following contains bacterial diseases? cholera, typhoid, pneumonia malaria, AIDS, cholera typhoid, tuberculosis, influenza diabetes, malaria, syphilis. Ozone layer of upper atmosphere is being destroyed by (a) S0 2 (b) chlorofluorocarbons(CFCs) (a) Patau's syndrome (b) Turner's syndrome (c) (d) both (a) and (b). (c) (d) Klinefelter's syndrome. 25 Cotton fibres are (a) seed coat Down's syndrome If a colourblind man marries a woman whose father is 86 BIOLOGY TODAY | DECEMBER '08 C0 2 (b) flower cover (c) root hairs (d) stem hairs. 26. Elements that make up 99% of all elements found in living system (a) C, H, 0 (b) C, H, 0, N (c) C, H, 0, N, P (d) C, H, 0, P 40. Main condition for a plant to perform cross pollination is (a) herkogamy (b) dichogamy (c) self sterility (d) all of these. 27. Which one of the following is a true nut? (a) peanut (b) groundnut (c) cashewnut (d) coconut. 41 Which one of the following hormone never reaches to cytoplasm? (a) estrogen (b) FSH (c) progesterone (d) testosterone. 28. Left handed DNA among following is (a) Z DNA (b) A DNA (c) C DNA 42. Life span of RBC is (a) 20 days (b) 120 days (c) 100 days (d) 150 days. (d) B DNA. 29. Excretory organ of platyhelminths is (a) gills (b) flame cells (c) nephridia (d) trachea. 43. Totipotency of plants was discovered by (a) Haberlandt (b) Darwin (c) Lamarck (d) Mendel. 30. (a) (c) 31 (a) (c) 32. (a) (b) (c) Placoid scales are found in reptiles (b) bony fishes cartilaginous fishes (d) amphibians. Anti-haemorrhagic vitamin is vitamin C (b) vitamin B vitamin A (d) vitamin K. 'Red data book' is concerned with red pigmentation of plants red algae endangered species (d) exotic species. 44. Protein-protein hybridisation results in (a) southern blotting (b) northern blotting (c) western blotting (d) none of these. 33. (a) (c) (d) First stable product in C4 plants is oxaloacetic acid (b) phosphoenol pyruvate ribulose 1,5 diphosphate malic acid. 47. Pigment present in blue green algae is (a) phycocyanin (b) phycoerythrin (c) haemoglobin (d) both (a) and (b). 34. Which of the following is correct hierarchical order of taxonomic categories? (a) kingdom, phylum, class, order, family, genus, species (b) kingdom, phylum, class, family, order, genus, species (c) division, class, kingdom, order, species, family (d) division, kingdom, family, class, order, species. 35. (a) (c) (d) Most enzymes that take part in Krebs' cycle are located in mitochondrial matrix (b) cytoplasm inner mitochondrial membrane plasma membrane. 36. Double fertilization is found without any exception in (a) bryophytes (b) gymnosperms (c) angiosperms (d) pteridophytes. 37. A person whose blood group is A, its genotype can be written as (a) lAlB, lAlB (b) lAlB, l°l° (c) lAlA, lAl° (d) lAl°, lBl°. 38. Teminism is also called as (a) reverse transcription (b) transcription (c) translation (d) replication. 39. Which valve is present between right auricle and right ventricle? (a) tricuspid valve (b) bicuspid valve (c) semilunar valve (d) Eustachian valve. 45. The air which is breath in and out quietly is called (a) vital air (b) residual air (c) tidal air (d) total lung capacity. 46. (a) (c) (d) Cladistic is a system of cytotaxonomy (b) numerical taxonomy phylogenetic classification biochemical classification. 48. What is the main difference between male and female cockroach? (a) jointed appendages (b) paired antennae (c) anal cerci (d) conglobate gland. 49; (a) (b) (c) (d) Nitrogenase enzyme converts atmospheric nitrogen into ammonia ammonia into nitrate and nitrite nitrate into nitrite nitrate and nitrite into nitrogen. 50. Chromosome complement with 2n-1 is called as (a) monosomy (b) nullisomy (c) trisomy (d) tetrasomy. 51. Naked seeds of gymnosperms meant for absence of which of the following? (a) seed coat (b) integument (c) embryo (d) none of these. 52. Beauty of Bougainvillea flower is because of (a) petals (b) calyx (c) bracts (d) sepals. 53. 'Heart of heart' is (a) SAnode (c) bundle of His (b) AVnode (d) Purkinje's fibres. 54. An orthotropous ovule is one, in which micropyle and chalaza are (a) at right angles to funicle(b) parallel to the funicle (c) in straight line of funicle (d) parallel along with ovule. I BIOLOGY TODAY |N O V E M B E R'08 213 55. (a) (b) (c) Which of following is a hallucinogen? lysergic acid diethylamide psilocybin mescaline (d) all of these. (a) cobalt chloride (c) potassium iodide 5' Which of the following is a correct sequence of decreasing order of number of species? (a) aves, pisces, reptiles, amphibians, mammals (b) pisces, aves, reptiles, mammals, amphibians (c) pisces, mammals, reptiles, amphibians, aves (d) amphibians, aves, pisces, mammals, reptiles. Which of the following occurs both in fresh as well as in marine water? (a) Oedogonium (b) Cladophora (c) Spirogyra (d) none of these. 58. Branch of science which determines the age of tree by counting annual rings is called (a) dendrology (b) chronology (c) dendrochronology (d) all of these. 59. Intermediate stage between aerobic and anaerobic cycles is (a) glyoxylate cycle (b) glycolysis (c) Krebs' cycle (d) none of these. What is the correct sequence of processes involved in central dogma? (a) replication, transcription, translation (b) replication, translation, transcription (c) translation, replication, transcription (d) transcription, replication, translation. Process in which fertilization occurs without fusion of gametes? (a) amphimixis (b) parthenogenesis (c) apomixis (d) none of these. Lichens indicate S02 pollution because they (a) show association between algae and fungi (b) grow faster than others (c) are sensitive to S02 (d) flourish in S02 rich environment. 63. Inorganic nutrients are present in soil in the form of (a) molecules (b) atoms (c) compounds (d) electrically charged ions. 64. Which type of fruit is found in rice? (a) legume {b) caryopsis (c) drupe (d) berry. 65. Which ofthe following is the product of glucose fermented by yeast? (a) C 6 H 1 2 0 5 (b) C 2 H 5 O H (C) ( C 6 H 1 Q 0 5 ) N (d) C H 3 O H . 68. (a) (c) 69. (a) (c) (b) dimethyl mercury (d) phenyl mercuric acetate. Swim bladder is present in Scoliodon (b) Labeo Chimaera (d) Trygon. Connecting link between cartilaginous and bony fishes is Catla (b) Chimaera Protopterus (d) Torpedo. 70. Which of the following parts of heart first receives deoxygenated blood? (a) right ventricle (b) left auricle (c) right auricle (d) left ventricle. 71. New strain of bacteria which is used in chewing up oil spoilage is (a) Escherichia coli (b) Bacillus subtilis (c) Salmonella typhimurium (d) Pseuedomonas putida. 72.Peptidoglycan is a characteristic constituent of the cell wall of (a) archaebacteria and eukaryotes (b) bacteria and cyanobacteria (c) eubacteria and unicellular eukaryotes (d) all members of monera and protista. 73.ln which of the following, reproductive structures lack a layer of sterile vegetative cells surrounding the egg? (a) Saccharomyces (b) Riccia (c) Funaria (d) Cycas. - Biological concept of species is mainly based on (a) morphology and methods of reproduction (b) methods of reproduction only (c) morphological features only (d) reproductive isolation. 75.ln case of incomplete dominance in F2 generation (a) the genotypic ratio = phenotypic ratio (b) the phenotypic ratio is 3 :1 (c) the genotypic ratio is 3 :1 (d) all of these. 76.In 1943, the causal organism and host of Bengal famine was (a) blast of rice by Xanthomonas oryzae (b) blast of rice of Pyricularia oryzae (c) wheat rust by Puccinia (d) brown leaf spot of rice by H. oryzae. 77.The grafting is not possible in monocots, because they (a) have parallel venation (b) lack cambium (c) are herbaceous (d) have scattered vascular bundle. 66. Which of the following is used as a bioweapon? (a) Clostridium botulinum (b) Escherichia coli (c) Bacillus anthracis (d). both (a) and (b) 7 -The epithelial lining the alveoli of the frog's lungs facing lung cavity is (a) columnar, non-ciliated (b) columnar, ciliated (c) squamous, ciliated (d) squamous, non-ciliated. Which of the following antitranspirant in plants? Chemical transmission of nerve impulses from one neuron to another, or from a neuron to a muscle is carried out by 86 chemical BIOLOGY TODAY | DECEMBER '08 serves as an 80.Mammalian brain differs from an amphibian brain in possessing (a) cerebellum (b) corpus callosum (c) olfactory lobes (d) hypothalamus. 9i-Which cell organelle helps in detoxification of drugs? (a) endoplasmic reticulum (b) lysosome (c) Golgi body (d) mitochondria. Lichen is (a) saprophytic (b) parasitic (c) holozoic (d) autotrophic. 8" The botanical name of sanjeevani is (a) Selaginelta gracilis (b) Selaginella rupestris (c) Selaginella biformis (d) Selaginella bryopteris. 95.Which enzyme helps in removing oil stains from clothes? (a) streptokinase (b) trypsin (c) lipase (d) amylase. 8: A tobacco plant heterozygous for albinism (a recessive character) is self-pollinated and 1200 seeds are subsequently germinated. How many seedlings would have the parental genotype? (a) 1250 (b) 600 (c) 300 (d) 2250. 9f .The first heart sound is produced when (a) semilunar valve shuts (b) interventricular pressure decreases (c) diastole begins (d) bicuspid and tricuspid valves close quickly 83.How much energy is consumed from one trophic level to another trophical level? (a) 15% (b) 10% (c) 5% (d) 20%. 97.Which of the following situation will be fatal to second foetus? (a) if Rh+ man marries Rh+ woman (b) if Rlr man marries Rh+ woman (c) if Rh+ man marries Rlr woman (d) if Rlr man marries Rlr woman (a) cholecystokinin (c) cholesterol (b) acetylcholine (d) all of these. 84.A plant has 24 chromosomes in "microspore mother cell". The number of chromosomes in its endosperm will be (a) 36 (b) 24 (c) 12 (d) 48. 85.Renal portal system is absent in (a) reptiles (b) amphibians (c) reptiles and amphibians (d) birds. 81 Which of the following statement is true about fungi imperfecti ? (a) They do not have sexual phase (b) They include species that prey only on nematodes (c) They include toadstools, puffballs and stink horns (d) They include Aspergillus, the fungus used to make soya sauce. The histogen layer present at the apex of the root tip is called (a) dermatogen (b) procambium (c) calyptrogen (d) plerome. Water vascular system is a characteristic of (a) ctenophora (b) annelida (c) echinodermata (d) arthropoda. • Sexual recombination in bacteria, involving a virus is known as (a) transformation (b) conjugation (c) transduction (d) none of these. Auxin is synthesized in which part of the plant ? (a) apical (b) nodal (c) internodal (d) axillary. Part of the stromach which opens into the duodenum ? (a) cardiac (b) pyloric (c) fundus (d) body. (a) (b) (c) (d) Find the odd one out parathyroid - tetany pancreas - diabetes insipidus adrenal cortex - Cushing's syndrome thyroid - goitre. ? 98 The distance between two genes in a chromosome is measured in cross over unit, which represent (a) rate of crossing over that occur between them (b) number of crossing over that occur between them (c) percentage of crossing over that occur between them (d) rate of bivalent formation 99.The nucleus is separated from the surrounding cytoplasm by a nuclear membrane, which is (a) single layered with pores (b) double layered with pores (c) single layered without pores (d) double layered without pores 100."One gene one enzyme" hypothesis was stated by (a) Beadle and Tatum (b) Leibig and Pasteur (c) Watson and Crick (d) August Weismann ANSWER KEY 1, 8. 15. 22. 29. 36. 43. 50. 57. 64. 71. 78. 85. 92. 99. (c) 2. (d) 9. (d) 16. (c) 23. (b) 3. (b) 10. (c) 17. (a) 24. (b) 30. (c) 37. (a) 44. (c) (c) 31. 38. (a) 51. (b) 58. (b) 65. (0 45. (d) 52. (c) 59. (b) 66. (d) 72. (b) 79. (d) 86. (b) 73. (b) 80. (a) 87. (b) 93. (a) 94. 4. (b) (c) 11. (c) (C) 18. (b) (b) 25. (a) (d) 32. (0 (0 5. 12. 19. 26. 33. (a) 39. (a) (c) 46. (c) (c) 53. (a) 40. 47. (b) 60. (a) (d) 67. (d) (a) 74. (d) 61. 68. (b) 81. (d) (c) S8. (c) (d) 95. (c) 82. 89. 54. 75. 96. (a) 6. (d) 7. (b) 13. (b) 14. (a). 20. (a) 21. (c) (d) (b) (b) 27. (c) 28. (a) 34. (a) 35. (d) 41. (b) 42. (a) (d) 48. (d) 49. (c) 55. (d) 56. (0 62. (c) 63. (a) (b) 69. (a) 76. (b) 83. (c) 90. (b) 70. (d) 77. (c) (b) (b) 84, (a) 91. (d) 97. (c) 98. (a) (b) (a) (b) (b) (d) (c) •1 (b) 100. (a) I BIOLOGY TODAY |N O V E M B E R'08 215 Morphallaxis refers to (a) reconstruction of whole body from a body part (b) regeneration of lost body parts like limb (c) regeneration with the help of blastema (d) healing of wound. 2. • Paired appendages are not found in (a) hemichordates (b) urochordates (c) cephalochordates (d) all of these. 3. 4. 5. 6. . 7. 8. Methadone is a (a) opiate narcotic (c) stimulant (b) sedative (d) hallucinogen. Epinephrine is secreted by (a) adrenal medulla and increases the heart rate (b) adrenal medulla and decreases the heart rate (c) adrenal cortex and increases the heart rate (d) adrenal cortex and decreases the heart rate. Peking man is also known as (a) Australopithecus (b) (c) Zinjanthropus (d) Sinanthropus Dryopithecus. Volkmann's canals connect (a) Haversian canal with matrix (b) Haversian canal with Haversian canal (c) Haversian canal with marrow cavity (d) lacunae to lacunae. Which kind of waves are generated in brain during deep sleep? (a) alpha wave (b) beta wave (c) delta wave (d) theta wave. Brunner's glands are found in submucosa of (a) stomach (b) pancreas (c) intestine (d) oesophagus. Food that enters into intestine is known as (a) bolus (b) chyme (d) none of these. (c) chyle 10. pH of blood is (a) greater than 7 (b) ranges between 7-8 (c) less than 7 (d) none of these. 9. Fats and lipids are absorbed in (a) lymph capillaries (b) blood capillaries (c) hepatic portal vein (d) none of these. Blood plasma contains - % water. (a) 60 (b) 80 (c) 90 Benzo-diazepene is an (a) antidepressant (c) antianxiety drug 98. (b) antipsychotic (d) sedative. 14. The most abundant immunoglobulin in our body is (a) Ig-A (b) Ig-D (c) Ig-G (d) Ig-M. 15. Genomic mutation is (a) change in number genes (b) change in number of chromosomes (c) change in shape of chromosomes (d) all of these. 16. Nutrition in protists is (a) holophytic (c) saprozoic (b) holozoic (d) all of these. 17. Valve that guards the right auriculoventricular aperture is (a) coronary valve (b) tricuspid valve (c) bicuspid valve (d) semilunar valve. 18. Normal glucose level in blood is (a) 150-180 mg/100ml blood (b) 80-100 mg/100ml blood (c) 30-70 mg/100 ml blood (d) 220-250 mg/100ml blood. 19. Which of the following protects the embryo from external injury? (a) allantois (b) chorion (c) amnion (d) yolk sac. Oxygen dissociation curve for myoglobin is (a) sigmoidal (b) hyperbolic (c) linear (d) parabolic. Which one is absent in viruses? (a) replication (b) protein synthesis (c) energy liberation (d) mutation. 22. Gynoecium with fused carpels Contributed by : OES, Vasant Kunj, New Delhi. BIOLOGY TODAY I DECEMBER '08 (d) * Based on memory (a) syncarpous (c) syngenecium (a) Clarius (c) Heteropneustes (b) apocarpous (d) none of these. 24. Calvin cycle is (a) reductive carboxylation (b) oxidative carboxylation (c) reduction (d) oxidation. 41. Which of the followings are required for blood clotting? (a) K+, thromboplastin (b) Ca++, thromboplastin (c) Na+, Ca++ (d) K+, prothrombin 25. K, N, Ca, Mg deficiency causes (a) chlorosis (b) leaf curl (c) exanthema (d) little leaf. 26. Which of the following is a bacterial disease? (a) citrus canker (b) red rot of sugarcane (c) red rust of tea (d) late blight of potato. (b) Gymnodinium (d) all of these. 28. Anaerobic respiration in muscles gives rise to the following (a) C 3 H 6 0 3 (b) CH3COCOOH (c) C2H5OH (d) CH3COOH. 29. In Bentham and Hooker's classification what was positioned in between dicots and monocots (a) gymnosperms (b) bryophytes (c) algae (d) pteriodophytes. 30. Addition of solute in the cell develops (a) TP (b) OP (c) DP Gambusia Solea. 40. Fasciola hepatica is (a) hermaphrodite, self fertilising (b) hermaphrodite, cross fertilising (c) unisexual (d) both (a) and (b). 23. Natural growth hormone (a) NAA (b) ethylene (c) 2,4,5-T (d) 2,4-D. 27. Red tide is caused by (a) Noctiluca (c) Gonyaulax (b) (d) (d) WP. 31 Population pyramids were first made by (a) Bodenheimer (b) Van Humboldt (c) Daubenmaire (d) Elton. 32, Number of thylakoids in a granum is (a) 5-10 ' (b) 2-100 (c) 100-150 (d) 150-200. 33 When both partners/components are affected negatively, the nature of interaction is (a) commensalism (b) predation (c) competition (d) ammensalism. 42. Nerve impulse travels faster in (a) medullated nerve fibre (b) non-medullated nerve fibre (c) same in both (d) none of these. 43. Black foot disease is caused due to excess of (a) arsenic (b) mercury (c) lead (d) cadmium. 44. Enzyme released from kidney is (a) renin (b) uricase (c) pepsin (d) none of these. 45. Which one of the following can be used as a bioweapon? (a) Bacillus anthracis (b) Treponema pallidum (c) Mycobacterium tuberculosis (d) Clostridium tetani. 46. Belenophobia is the fear of (a) dust (b) depth (c) needles (d) water. 47. Wilting in plants is due to (a) less absorption than transpiration (b) more absorption than transpiration (c) negative root pressure (d) high humidity. 48. Which .of the following is a protein deficiency disease? (a) Addison's disease (b) scurvy (c) kwashiorkor (d) pellagra. 34 Which of the following stores fats and essential oils? (a) phaeoplast (b) peroxisome (c) elaioplast (d) spherosome. 49. Mitochondria perform all of the following functions except . (a) nucleic acid synthesis (b) p - oxidation of fatty acids (c) ATP synthesis (d) polysaccharide degradation. 35 Totipotency was demonstrated by (a) White (b) Gautheret (c) Haberlandt (d) F.C. Steward. 50. Pyramid of energy in a pond ecosystem is always (a) inverted (b) upright (c) irregular (d) linear. 36 Number of cervical vertebrae in humans is (a) 7 (b) 5 (c) 12 (d) ANSWER KEY 10. 37 Which of the following is not an arachnid? (a) spider (b) itchmite (c) louse (d) tick. 38 Karyology is the study of (a) cell (b) nucleus (c) tissue (d) 39 Which of the following fish first injures its prey genes. 1. 8. 15. 22. 29. 36. 43. 50. (a) (c) (b) (a) (a) (a) (a) (b) 2. 9. 16. 23. 30. 37. 44. (d) (b) (d) (b) (a) (c) (a) 3. 10. 17. 24. 31. 38. 45. (a) (b) (b) (a) (a) (b) (a) 4. 11. 18. 25. 32. 39. 46. (a) (a) (b) (a) (b) (c) (c) 5. 12. 19. 26. 33. 40. 47. (b) (c) (c) (a) (c) (d) (a) 6. 13. 20. 27. 34. 41. 48. (b) (c) (b) (d) (c) (b) (c) (c) (c) (c) • (a) 35. (c) 42. (a) 49. (d) 7. 14. 21. I BIOLOGY TODAY |N O V E M B E R'08 217 Revised O B J E Now on SALE!! C T I V E Questions from 2008 Entrance Exams included •> Covers complete syllabi. •> A b o u t 5 0 0 0 M C Q s envelope all topics. •> Must for IIT-JEE, AIEEE and all other Engineering Entrance Examinations. Jill Quest' Hi •> H i g h l y u s e f u l f o r CBSE-PMT, AIIMS, AFMC and all other Medical Entrance Examinations. •> Selected questions from 2005, 2006, 2007 and 2008 Entrance Exams. Send D.D/M.O in favour of MTG Books. Add Rs. 35 for postage , Available at leading book-shops throughout India. Price : Rs. 495 & MTG BOOKS 503. Taj Apt.. Ring Road, Near Safdarjung Hospital New Delhi - 110 029. Tel.: 26191599, 26191601 e-mail : info@mtg.in web : www.mtg.in International Biology Olympiad Problems 1. Consider sthe following components: 1. Transitional elements of ER 2. RER 3. Golgi complex 4. Zymogen granules 5. Lumen of the pancreas The direction of flow in the secretory pathway of secreting protein in the pancreatic cell is (a) 1 , 2 , 3 , 4 , 5 (b) 2 , 1 , 3 , 4 , 5 (c) 2 , 1 , 4 , 3 , 5 (d) 1 , 2 , 4 , 3 , 5 . 2. 3. 4. The scientist/s who first demonstrated that a virus was made up of a nucleic acid and protein was/were (a) W.M.Stanley (b) Dr. N.W. Pirie and Dr. F. C. Bawden (c) Dr. Salvador Luria and Dr. Max Delbruck (d) Dr. Jonas Edward Salk. Which of the following features is the most vital for the polarized transport of glucose in an animal epithelial cell? (a) gap junctions (b) tight junctions (c) membrane fluidity (d) lateral movement of proteins in the plasma membrane. You have injected a large amount of Thymosin beta 4 into a migrating fibroblast. Which is the most likely scenario? (a) the cell stops to migrate as F-actin filaments disintegrate (b) the cell increases migration speed as more G-actin becomes available for polymerization at the leading edge (c) the cell slows down and the F-actin content of the cell increases as Thymosin beta 4 prevents de-polymerization (d) the treatment has no effect in the tropical rain forest the majority of trees have showy animal-pollinated flowers. In temperate forests the majority of trees are wind pollinated. Which factors best explain these contrasting patterns? i. Wind is rare in tropical forests ii. Because of high species diversity in the tropics, individuals of tree species are often widely separated making wind an inefficient means of pollen dispersal iii. More opportunities for co-evolved mutualisms exist in tropical forests because of the high diversity of animal species Trees in tropical forests are mostly evergreen and year-round leaf canopies impede pollen dispersal by wind v. Flowering in tropical forests occurs over a short period of time when wind is absent. (a) i, ii, v (b) i, iii, v (c) ii, iii, iv (d) ii, iv iv. 6. The (a) (b) (c) (d) primary purpose of a "null hypothesis" is to: ensure there is no bias in the experiment. design a hypothesis that can be proven. allow for the use of statistical techniques. provide an alternate hypothesis to the one being tested. 7. Which statement is correct? (a) modern ecosystems do provide analogues for past ecosystems in interglacials and during the Holocene period. (b) all pollen types can be identified at the species level. (c) plant and animal communities move intact in response to climatic change. (d) some species produce large amount of pollen so they are over represented in pollen diagrams (e.g. pine). 8. Which of the following mechanisms would account for increased urine production as a result of drinking alcoholic beverages? (a) decreased amount of antidiuretic hormone secretion (b) increased aldosterone production (c) the osmoregulator cells of the brain increasing their activity (d) increased blood pressure 9. A cheap method of controlling wood-rotting fungi is (a) impregnation of wood with suitable chemicals (b) effective dehydration of wood (c) employment of Trichodesma, another fungus (d) physical removal of fructifications of wood rotting fungi 10. Annelida and mollusca resemble in many embryonic features because both have (a) spiral cleavage and mesoderm formation (b) identical conspicuous segmentation in body, muscles and nervous system (c) meroblastic cleavage and ectoderm formation (d) special types of mouth parts Answer Key 1. 6. (b) (b) 2. 7. (b) (d) 3. 8. (b) (a) 4. 9. (a) (c) 5. (c) 10. (b) • • 219 I BIOLOGY TODAY |N O V E M B E R'08 MCQS in .•« Human Biology Must for AIIMS, CBSE, BHU, AFMC, Manipal, UP-CPMT & other PMTs Formation of cartilage bones involves (a) deposition of bony matter by osteoblasts and resorption by chondroclasts (b) deposition of bony matter by osteoclasts and resorption (c) Typical 'lubb-dupp' sounds heard in heart beat are due to (a) closing of bicuspid and tricuspid valves (b) closing of semilunar valves blood under pressure through aorta by chondroblasts (c) deposition of bony matter by osteoclasts only (d) closure of bicuspid-tricuspid valves followed by semilunar valves. (d) deposition of bony matter by osteoblasts only. 2. 8. Proteolytic enzyme required for lysis of fibrinogen during 9. Which of the following facts suggests that oxygen is transported from tissue combined with haemoglobin rather fibrinolysis is (a) plasmin (b) fibrin than dissolved in (c) platelet factor (d) thrombin. (a) oxygen carrying capacity of whole blood is higher than 3. Atlas vertebra of man is characterized by the presence of (a) proceolous centrum (b) acoelous centrum (c) (d) absence of centrum amphicoelous centrum plasma and oxygen contents of blood entering the lungs is less than that leaving the lungs. (b) haemoglobin can combine with oxygen (c) Sella turcica is (a) depression of long bone (d) an increase in C0 2 concentration decreases the 0 2 affinity (b) ridge over a bone (c) oxyhaemoglobin can dissociate into haemoglobin and oxygen of haemoglobin. depression in the skull in the area of pituitary gland (d) ridge in the skull over the area of pituitary gland Hunger center is in 10. The index of pulmonary function is the (a) air left in the lung after a maximum forced exhalation (b) greatest amount of air that can be expired after a maximal (a) medulla oblongata (b) hypothalamus (c) pons varolii (d) none of these. Frenulum is inspiratory effort or inspiration (c) amount of air that moves out with normal inspiration (d) amount of air present in the lung at a time. (a) adenoid present on pharyngeal wall 11. Remarkable fall in blood pressure affects the normal (b) tonsil found on lateral walls of soft palate function of kidneys reducing (c) V-shaped sulcus dividing tongue into pharyngeal and oral (a) secretion of nitrogenous wastes parts (b) renal filtration (d) fold attaching tongue. 7. Absolute refractory period of heart is (a) during contraction when the heart is in non-responding period (c) reabsorption of useful substances (d) none of the above. 12. Difference between glomerular filtrate and blood plasma is of (b) during expansion (a) (c) during negative charge (b) potassium (d) during positive charge. (c) first is white and second is yellow BIOLOGY TODAY I DECEMBER '08 proteins (d) first is yellow and second is white. Which nerves transmit impulses towards central nervous system? (a) oculomotor nerves (b) ventral root of spinal nerves (c) auditory nerves •(d) abducens nerves. (a) hCG (c) androgen (b) relaxin (d) estradiol. 18. Brain sand is found in (a) thyroid (c) pineal body (b) thymus (d) all of these. 19. Pseudopregnancy is due to (a) polyembryony (b) absence of fertilization after ovulation (c) hormonal disturbances (d) all ofthe above. In mammals, corpus callosum connects a muscle to a bone midbrain to medulla oblongata two cerebral hemispheres a bone to another bone. 20. Clinical fever in malaria is due to (a) erythrocytic gametogony erythrocytic schizogony (c) pre-erythrocytic schizogony (d) exo-erythrocytic schizogony Receptors of pressure present in deep layers of skin are Krause's end bulb (b) Meissner's corpuscles Pacinian corpuscles (d) corpuscles of Ruffini j Ductus reuniens connects utriculus and semicircular canal sacculus and utriculus • sacculus and cochlea cochlea and semicircular canals ANSWERS 1. (a) 2. (d) 3. (d) 4. (c) 5. (b) 6. (d) 7. (a) 8. (d) 9. (a) 10. (b) 11. (b) 12. (a) 13. (c) 14. (c) 15. (c) (c) 17. (c) 19. (0 20. (b) 16. (a) 18. •I PRIZE WINNERS witG- BIO GENIUS CONTEST-5 1st Prize 2nd Prize 3rd Prize Kuntal Konar Deeptimayee Patra Sumon Kumar Paul Lakepara, ward No. 3 Town + P.O - Arambagh, Hooghly, West Bengal-712601 At- Alupur, Po/Dist - Balasore, C/O Guru Das Paul, Sukantapally Ward No. 3, P.O. - Tufanganj Dist - Coochbehar, West Bengal - 736159 Orissa - 756001 Other Highly Commendable Contestants • • • Krishan Kumar Rajbhar (Uttar Pradesh) Soumesh Ray (Arunachal Pradesh) Roshan Kumar Sai (Orissa) H. Anushya (Kotagiri, Nilgiris) Madhubanti Deb (Darjeeling, W.B) Diptangshu Roy Chowdhury (Kolkata) Heartiest Congratulations and Best Wishes for bright future to all Winners! Prizes are being sent. B I O L O G Y TODAY I DECEMBER '08 MODEL TEST PAPER FOR CBSE - PMT (Prelims) - 2 0 0 9 , 1. The term 'Biology' for the study of living organisms was coined by (a) Lamarck and Triviranus (b) Huxley (c) Purkinje and Von Mohl (d) Aristotle 13. Dry fruit formed from bilocular superior ovary and dehiscing into two valves from base upward is (a) legume (b) follicle (c) carcerulus (d) siliqua 2. The most primitive vascular plants are (a) ferns (b) brown algae (c) Cycas (d) red algae 14. (a) (b) (c) The natural system of classification was proposed by (a) Bentham and Hooker (b) Hooker and Linnaeus (c) Bentham and Huxley (d) Darwin and Lamarck 15. Nodulated roots are characteristic of family (a) fabaceae (b) asteraceae (c) poaceae (d) solanaceae Entamoeba histolytica differs from Amoeba proteus in not having (a) pseudopodia (b) contractile vacuole (c) ectoplasm and endoplasm (d) nucleus 16. Which one is not formed from procambium? (a) xylem (b) phloem (c) intrafascicular cambium (d) interfascicular cambium 5. Late blight of potato is caused by (a) Altemaria solani (b) Phytophthora infestans (c) Albugo Candida (d) Fusarium moniliforme 6. The zygospore of Spirogyra after undergoing a rest, germinates into a unicellular structure, called (a) sporophytic plant (b) germ cell (c) germ tube (d) germ plant 7. (a) (b) (c) (d) Musculature in Ascaris is formed of circular muscles circular and longitudinal muscles single layer of spindle shaped cells oblique and tangential circular muscles 8. A plant has weak stem which can coil around an upright support. It is a (a) lianas (b) twiner (c) climber (d) creeper 9. The plant stores food in the stem in (a) Bryophyilum (b) banana (c) brinjal (d) Cucurbita 10 A compound leaf with more than thrice pinnate nature is (a) multifoliate (b) decompound (c) quadrifoliate (d) tripinnate 11 Simple umbel inflorescence has flower arrangement in (a) acropetal (b) centripetal (c) irregular (d) basipetal 12 A monothecous stamen has (a) small anther (b) sterile anther (c) one lobed anther (d) one chambered anther 17. (a) (c) (d) During germination, micropyle of seed takes part in forming weak point for emergence of radicle absorption of water passage of gases (d) leaching inhibitors Oldest part of phloem in a dicot stem is situated just outside vascular cambium (b) inner to primary cortex inner to vascular cambium between periderm and primary cortex 18. Areolar tissue joins (a) integument with muscles (b) bones with muscles (d) fat body with muscles (c) bone with bone 19 "Each cell leads a double life" was first proposed by (a) Schleiden . (b) Grew (c) Von Mohl (d) Malpighi 20 Endoplasmic reticulum occurs in the form of (a) vesicles (b) cisternae (c) tubules (d) all of these 21 A nonessential amino acid is (a) lysine (b) methionine (c) serine (d) isoleucine 22 (a) (b) (c) (d) In double helix of DNA, the two DNA strands are coiled around a common axis • coiled around each other coiled differently coiled over protein sheath 23 Organelle important in spindle formation during nuclear division is (a) centriole (b) Golgi body (c) chloroplast (d) mitochondrion 24 At which stage of meiosis I, the homologous chromosomes separate but are held by chiasmata (a) diakinesis (b) diplotene (c) pachytene (d) zygotene BIOLOGY TODAY MARCH'09• 25. A plant cell has 12 chromosomes at the end of mitosis. How many chromosomes would it have in the G2 phase of its next cell cycle? (a) 6 (b) 8 (c) 12 (d) 2 4 . (a) (b) (c) (d) 26. (a) (c) (d) Transpiration cohesion tension theory operates in active absorption (b), passive absorption both active and passive absorption none of the above 36. In mammals the opening of inferior vena cava in the back wall of right auricle is guarded by (a) mitral valve (b) tricuspid valve (c) Eustachian valve (d) Thebasian valve 27. Osmotic pressure is responsible for the turgidity of plant cells which (a) causes cell elongation (b) causes opening of stomata (c) prevents wilting of leaves (d) causes all the above 37. If a person is suffering from a disease called muscular dystrophy, he will eliminate in urine great amount of (a) sulphate (b) glucose (c) creatine (d) water 28. Which of the following is common to ferredoxin and cytochrome? (a) Na(b) K (c) Fe (d) Mg 29. Black necrosis of stem and root tip is caused by the deficiency of (a) magnesium (b) chlorine (c) copper (d) boron 30. In the process of photosynthesis, the first step is (a) absorption of C0 2 (b) absorption of 0 2 (c) excitation of an electron of chlorophyll a by a photon of light (d) photolysis of water 31. At the end of the Krebs' citric acid cycle, most of the energy removed from glucose molecule has been transferred to (a) citric acid (b) oxaloacetic acid (c) ATP (d) NADH2 and FADH2 32. Which of the following characters is shared by liver of frog and man? (a) Glisson's capsule (b) presence of hepatic cord cells (c) secretion of bile (d) five lobes 33. Which of the following set of enzymes are found in pancreatic juice? (a) pepsinogen, prorennin, gastric lipase (b) enterokinase, erepsin, maltase, sucrase (c) trypsinogen, chymotrypsinogen, carboxypeptidase, amylase, lipase (d) all of the above 34. The volume of air that can be expired forcibly after a normal expiration is (a) residual volume (b) expiratory reserve volume (c) inspiratory reserve volume (d) vital capacity of lung 35. A person met an accident and died instantly without any injury to heart, brain, stomach and kidney. One of the following is the reason of death 16 BIOLOGY TODAY | MARCH '09 intestine became twisted red blood cells became coagulated stomach stopped digestion diaphragm got punctured 38. Olecranon process is present in (a) humerus (b) femur (c) ulna (d) pectoral girdle 39. During development of action potential in a nerve fibre, positive and negative charges on outer and inner side of axon membrane are reversed due to (a) extension of all K+ ions (b) more K+ ions enter than NaT ions leave the axon (c) more Na + ions enter the axon than K+ ions leave the same (d) all Na + ions enter the axon 40 Cell 'A' with O.P. = 10 atm and T.P. = 5 atm. is in contact with cell 'B' having O.P. = 15 atm and T.P. = 12 atm. The flow of water will be (a) from A to B (b) equal flow (c) from B to A (d) no flow 41. A primary deficiency is caused by insufficient absorption of (a) magnesium (b) manganese (c) calcium (d) potassium 42. In C4-plants, Calvin cycle enzymes are absent in (a) mesophyll chloroplasts (b) bundle sheath chloroplasts (c) guard cell chloroplasts (d) epidermal chloroplasts 43. Number of cytochrome complexes involved in the transfer of a pair of electrons through ETS is (a) 1 (b) 2 (c) 3 (d) 4 44. Nawaschin discovered double fertilization in (a) mango and pear (b) papaya and wheat (c) Brassica and Iberis (d) Lilium and Fritillaria 45. The protein deficiency disease is (a) scurvy (b) Addison's disease (c) kwashiorkor (d) pellagra 46. Largest erythrocyte in vertebrate measuring about 80nm in diameter is found in (a) elephant (b) horse (c) Amphiuma (d) lion 47. (a) (b) (c) (d) Bowman's capsule is lined by ciliated cuboidal epithelium squamous epithelium nonciliated cuboidal epithelium nonciliated columnar epithelium 48. (a) (b) (c) (d) Haematuria is the disorder involving the loss of blood through the urine loss of haemoglobin in urine loss of glucose in urine the increase in blood urea concentration 49. Movable joints are called (a) fibrous joints (b) symphyses (c) synovial joints (d) cartilaginous joints 50. Match the column I with column II and choose the correct answer Column II Column I (A) Diencephalon (1) Cerebellum (B) Telencephalon (2) Medulla (C) Myelencephalon (3) Cerebrum (D) Metencephalon (4) Thalamus (a) A - 4 , B - 3 , C - 2 , D - 1 (b) A - 4 , B - 3 , C - 1, D - 2 (c) A - 3 , B - 4 , C - 1, D - 2 (d) A - 1 , B - 2 , C - 3 , D - 4 51. (a) (b) (c) (d) Acromegaly is the result of hypersecretion of GH in children hypersecretion of GH in adult hyposecretion of GH in children hyposecretion of GH in adult 52. (a) (b) (c) (d) 100 spermatozoa and 100 mature ova are formed by 50 secondary spermatocytes and 50 secondary oocytes 25 secondary spermatocytes and 25 secondary oocytes 25 primary spermatocytes and 25 primary oocytes 25 primary spermatocytes and 100 primary oocytes 53. (a) (b) (c) (d) Cleavage differs from mitosis because in cleavage there is no growth phase following cell division in cleavage consumption of 0 2 increases in cleavage nudeus-cytoplasmic ratio increases all of the above 54. (K - N)/K represents in ecology (a) carrying capacity (b) environmental resistance (c) vital index (d) crash phase 55. Which ecosystem does not show variations dependent upon geographic location and rainfall? fresh water ecosystem (a) marine ecosystem (d) tropical ecosystem (c) desert ecosystem 56. Taungya is (a) a method of shifting cultivation (b) type of agroforestry practice (d) both (a) and i (c) protection forestry 57. Number of biosphere reserves in India in May 2002 was (a) 9 (b) 11 (c) 13 (d) 15 58. A species spread over a large tract with varied environmental conditions will have (b) uniform gene pool (a) higher genetic diversity little genetic diversity (c) (d) either (b) and (c) 59. A secondary pollutant is CO (a) 60. (a) (b) (c) (d) (0 (d) Pb CH4 Psychosis is characterised by loss of touch with reality prolonged emotional reaction to a given stress anxiety, fear, sadness, vague aches and pains all the above 61. Barbiturates are (a) tranquillisers (c) hallucinogenic (b) sedatives and hypnotics (d) stimulants 62. Polyploidy is induced through (a) colchicine (b) irradiation (c) mutagenic chemicals (d) ethylene 63. Grains of major cereals and millets lack amino acids (a) methionine and cysteine (b) methionine and lysine (c) tryptophan and cysteine (d) lysine and tryptophan 64. (a) (b) (c) Callus formation is promoted by proper light and subculturing darkness and subculturing excess of NAA (d) absence of salts 65. (a) (c) (d) Asbestos causes cancer of liver (b) prostate gland lungs and pleural membrane urinary bladder 66. An animal having unsegmented, coelomic and radially symmetrical body with distinct oral and aboral surfaces is a member of (a) echinodermata (b) mollusca (c) annelida (d) arthropoda 67. fish, (a) (b) (c) (d) Which one of the following features is common is silver scorpion, dragonfly and prawn? three pairs of legs and segmented body chitinous cuticle and two pairs of antennae jointed appendages and chitinous exoskeleton cephalothorax and tracheae 68. Which one is common feature of Amphioxus, frog, sea horse and crocodile? (a) skeleton of cartilage and bone (b) three chambered heart (c) mode of excretion is reptelism (d) dorsal solid nerve cord BIOLOGY TODAY MARCH '09 • Which one is a cat fish? (a) Labeo rohita (c) Cirrhina mrigala 77. The ditellum in a mature Pheretima is a thick girdle which is (a) glandular in nature and surrounds segments 16-18 (b) non-glandular in nature and surrounds segments 16-18 An epithelial tissue having thin flat cells arranged edge to : (c) glandular in nature and surrounds segments 14-16 edge so as to appear like closely packed tiles is found at (d) non-glandular in nature and surrounds segments 14-16. (a) outer surface of ovary | (b) inner lining of fallopian tubes : 78. Gonorrhoea is caused by (c) inner lining of stomach (d) inner lining of cheeks (a) Treponema pallidum (b) Entamoeba gingivalis (c) Mycobacterium leprae (d) Neisseria gonorrhoeae. Where do you find oblique cross connections forming a j contractile network of fibres and intercalated discs? 79. The causative agent of mad-cow disease is a (a) voluntary muscles (b) cardiac muscles (a) bacterium (b) prion (c) worm (d) virus. (c) involuntary muscles (d) none of these. Open circulatory system is not of physiological hindrance ; 80. Certain characteristic demographic features of developing countries are in cockroach because (a) high fertility, high density, rapidly rising mortality rate and (a) heart is simple but chambered (b) blood is colourless a very young age distribution (c) circulatory and respiratory systems are not connected (b) high infant mortality rate, low fertility, uneven population (d) excretion occurs through Malpighian tubules. growth and a very young age distribution 73. Frog has no neck. Suppose it had one, it would (c) high mortality, high density, uneven population growth (a) swallow its prey easily and a very old age distribution (b) then be unable to leap on land easily (d) high fertility, low or rapidly falling mortality rate, rapid (c) breathe easily by floating on water surface population growth and a very young age distribution. (d) swim easily in water. 74. Which one of the following pairs correctly matches a ; 81. Tubectomy is done in (a) female (b) male hormone with a disease resulting from its deficiency? (a) luteinizing hormone - failure of ovulation (c) mule (d) both (a) and (b). (b) insulin - diabetes insipidus 82. Bartholin's glands are situated (c) thyroxine-tetany (a) on the sides of the head of some amphibians (d) parathyroid hormone - diabetes mellitus. (b) at the reduced tail end of birds The hypofunction of p-cells of islet of Langerhans are (c) on either side of vagina in humans (a) hypoglycaemia and glycosuria (b) hyperglycaemia and glycosuria : (d) on either side of vas deferens in humans. (b) Catia catla (d) Wallago atlu (c) hyper insulinism and uraemia (d) hyperglycaemia and diabetes mellitus. j (a) Column I lists the components of body defence and column : (b) II lists the corresponding descriptions. Match the two columns. : (c) Choose the correct option from code given (d) Column II Column I 8< injection of gamma (A) active natural immunity (p) (a) globulins complement proteins and ; (c) (B) first line of defense (q) interferons ; 85. direct contact with the j (C) passive natural immunity (r) (a) pathogens that have entered inside ; (D) second line of defense (s) surface barriers j (b) (t) antibodies transferred j (c) Sequence of hormones during menstrual cycle is oestrogen, progesterone and FSH progesterone, oestrogen and FSH FSH, oestrogen and progesterone FSH, progesterone and oestrogen. The southern blot technique is used for the detection of DNA (b) RNA protein (d) none of these. Which of the following statements is wrong? before 1982, the main source of insulin hormone was pig and cattle prancrease obtained from slaughter houses cattle insulin is chemically indentical to human insulin pig insulin is not identical to human insulin, and it causes harmful side effects in some people through the placenta > (a) A = s, B = r, C = t, D = q (b) A = r, B = s, C = q, D = t ; (d) now we have genetically engineered bacteria that actually (c) A = r, B = s, C = t, D = q (d) A = r, B = t, C = q, D = p. ! synthesise and secrete human insulin. 16 BIOLOGY TODAY | MARCH '09 How many types of gametes are found in F, progeny of Restriction endonucleases were used by Cohen and Boyer's | cross AA BB CC and aa bb cc? DNA experiments for j (a) 3 (b) 8 (c) 27 (d) 64. (a) isolation of cloned bacterial plasmids (b) cleaving the bacterial plasmid Gametic maps of chromosomes are based on (c) isolation of human insulin (a) non disjunction (b) translocation (d) both (a) and (b). j (c) dominance (d) genetic recombination. Genetic diagnosis by DNA testing Formation of embryo directly from nucellus and integument (a) detects only mutant and normal alleles is (b) can be done only on eggs or sperms j (a) adventitive polyembryony (b) apospory (c) involves hybridization to ribosomal RNA (c) apogamy (d) apomixis. (d) utilizes restriction enzymes and a polymorphic site. , j Egg apparatus consists of Azolla is used as biofertilizer as it has j (a) egg and antipodals (b) polar nuclei (a) Rhizobium (b) cyanobacteria (c) egg and synergids (d) egg. (c) Mycorrhiza (d) large quantity of humus. j ANSWER KEY Best milch breed of cattle is (a) red sindhi (b) deoni (c) holstein-friesian (d) sahiwal. During callus differentiation which of the cells divide? (a) parenchyma only (b) meristematic only (c) both (a) and (b) (d) no division. j Which of the following statements is correct regarding evolution of human? (a) Neanderthal man and cro-magnon man were living at the same time (b) Austraiopithecous was living in Australia (cj Homo erectus was succeeded by Homo habiiis (d) none of these, ; i ; Convergent evolution is illustrated by (a) rat and dog (b) bacterium and protozoan (c) starfish and cuttle fish (d) dogfish and whale. ; (a) (b) (c) (d) (a) (b) (c) (d) ; (b) protocells (d) both (a) and (b). Pneumococcus experiment proves that DNA is genetic material bacteria undergo binary fission bacteria do not reproduce sexually at times RNA controls production of DNA and proteins. Synthesis of DNA over RNA template occurs in (a) TMV (b) T2 (c) Reovirus (d) Rous SarComa Virus. 9. 16. 23. 30. 37. 44. 51, 58. 65. 72. 79. 86. 93. (a) (b) (d) (a) (c) (c) (d) (b) (a) (c) (c) (b) (d) (c) (c) 3. 1.0. 24. 31. 38. 45. 59 66. 73. 80. 87. 94. (a) (b) (b) (b) (d) (c) (c) (d) (a) (a) (b) (d) (d) (a) 4. 18. 25. 32. 39. 46. 60, 67. 74. 81. 88. 95. (b) 5. (b) ft (d) 12. (c) (a) 19. (a) 20. (c) 26. (b) 27. (c) 33. (c) 34. (c) 40. (c) (b) (c) (b) (d) (b) (a) (c) 6 8 ; (d) (a) (d) (c) 83. (a) (b) 89. (c) (a) 96 (d) 97 (c) (d) (d) (d) (b) (d) (a) (a) (a) (d) (d) (c) (b) (b) 7. 21 28 35 42 56 91 98 (c) (b) (c) (c) (d) (a) (c) (d) (d) (a) (c) (a) (d) (d) •• Cheats use spy gear in China exam, 1 0 0 0 caught Industrial melanism is an example of drug resistance ; darkening of skin due to smoke from industries protective resemblance with the surroundings ; defensive adaptation of skin against ultraviolet radiations. ; Coacervates are (a) colloidal droplets (c) protobiont 1. (a) (b) T5. (a) 22. (a) 29. (d) 36. (c) 43. (b) 50. (a) 57. (c) 64. (b) 71, (b) 7Q. / o. (d) 85. (b) 92. (d) 99. (a) 8. ; Shanghai : More than 1,000 applicants were caught cheating on China's civil servant exams, with some using spy technology such as micro-earpieces and wireless transmitters, state media reported on Monday. More than 300 were caught in the act during the November 30 exam, while about 700 others were deemed to have cheated because their papers "shared much conformity," the official Xinhua news agency reported. The State Bureau of Civil Servants' announcement that a record number of cheaters were caught highlights the difficulties for China's ruling Communist Party in stamping out rampant corruption among its ranks. More than half used technology provided by illegal organisations that provided answers in exchange for money. Some high-tech cheaters used carefully disguised wireless transmitters to obtain answers, while others received radio signals through tiny earpieces. BIOLOGY TODAY MARCH '09 • Model Test Paper West Bengal JEE 2009 According to new pattern 80% questions will be multiple choice questions of 1 mark each and 20% questions (short answer type) will carry 2 marks each. Time : 2 hrs. Max. Marks : 100 INSTRUCTIONS Question paper consists of two sections : Section A contains multiple choice questions. Each question carries 1 mark. Section B contains short answer type questions. Each question carries 2 marks. SECTION A Multiple Choice Questions 1. (a) (b) (c) (d) Cell membrane carbohydrates participate in transporting substances across the membrane cell-to-cell recognition attaching the membrane to the cytoskeleton cell adhesion. and (a) (b) (0 (d) Darwin believed that certain parts of the body get larger more complex through the generations because they are used more extensively than other parts contribute to greater reproductive success are predetermined to do so all of the above. Which of the following ways of acquiring nutrients is not characteristic of fungi? (a) heterotrophic (b) autotrophic (c) saprophytic (d) parasitic. Which of the following is not a characteristic of organisms in the Kingdom Animalia? (a) storage of carbohydrates as starch. (b) multicellularity. obtaining nutrients by ingestion, (c) (d) having eukaryotic cells without walls. The physiological capacity of a species of animals to produce their progeny in the absence of natural enemies, diseases or other inhibiting factors is (a) carrying capacity (b) biotic potential (c) population explosion (d) all of these. Compared to Gram-negative bacteria, Gram-positive bacteria (a) have more complex cell walls (b) are more resistant to antibiotics (c) retain the violet dye rather than the red (d) have less peptidoglycan. / 3 Root hairs are formed from extensions of the (a) ground tissue (b) periderm (d) epidermis. (c) cuticle 8. During the first three steps of glycolysis, glucose is converted to fructose 1, 6-diphosphate by rearrangement of the molecule and addition of two phosphate groups. The phosphate groups come from (a) phospholipids of the membrane (b) inorganic phosphate (c) ADP (d) ATP 9. A heart murmur indicates a defective (a) sinoatrial node (b) atrioventricular node (c) heart valve (d) pulmonary artery or aorta. 10. The breathing center in the brain responds mainly due to changes in the (a) oxygen concentration of the blood (b) carbon dioxide concentration of the blood (c) glucose in the mitochondria (d) acetyl coenzyme A in the mitochondria. 11. The regions of an antibody that determine its general role or effector function, are its (a) variable (V) regions (b) constant (C) regions (c) mutated (M) regions (d) bifurcated (B) regions. 12 A plant species that has, on each individual plant, flowers with stamens and carpels is (a) perfect (b) imperfect monoecious (d) dioecious. (c) 13. The infective stage of Plasmodium to human is (b) sporozoite (a) trophozoite (d) schizoite. (c) merozoite 14. infective stage of Ascaris for new host (a) I stage juvenile (b) embryonated egg (c) III stage juvenile (d) larva after II moult. 15. The venom of honey bee is used for treatment of (a) ulcers (b) arthritis and snake bite (c) whooping cough (d) inflammations. 16. Which of the following is the pair of biofertilizers ? (a) Azolla and BGA (b) Nostoc and legume (c) Rhizobium and grasses (d) Salmonella and E.coli. BIOLOGY TODAY MARCH'09• The human cranial nerve that sends parasympathetic stimulation to the heart, stomach, and iiver is (a) trigeminal (b) abducens (c) vagus (d) glossopharyngeal. Which of the following is not reabsorbed from the filtrate in the the proximal convoluted tubule? (a) glucose (b) Na + (c) water (d) none of these. The unique properties of each amino acid are determined by its particular (a) R group (b) amino group (c) carboxylic group (d) hydrogen atom. 20 (a) (b) (c) (d) Cellulose is branched chain with a -1, 6 and P - 1 , 4 bonds unbranched chain with a -1, 6 bonds unbranched chain with P -1, 4 bonds branched chain with a - 1 , 4 and p -1, 6 bonds. An enzyme promotes a chemical reaction by (a) lowering the energy of activation (b) changing the free energy difference between substrate and product (c) increasing molecular motion (d) all of the above. (a) (b) (c) (d) Proteins to be used outside the cell are synthesized in the mitochondria on the rough endoplasmic reticulum on the smooth endoplasmic reticulum on free ribosomes. | The correct molecular formula of chlorophyll-a is j (a) C 5 5 H 7 0 O 5 N 4 M g (b) C 5 5 H 7 0 O 6 N 4 M g i (c) C 5 5 H 7 2 0 5 N 4 M g (d) C 5 5 H 72 0 6 N 4 Mg. The source of oxygen evolved during photosynthesis is ; (a) H 2 0 (b) C6 H 12 0 6 (c) C0 2 (d) n(CH 2 0). Fluid mosaic model of cell membrane believes that it has | lipid bilayer with j (a) proteins on both the surfaces : (b) proteins on the outer surface only j (c) proteins embedded in it only | (d) some proteins embedded and some on the surface. | At the end of the Krebs cycle, most of the energy removed j from the glucose molecule has been transferred to the ; (a) NADH and FADH2 (b) ATP ; (c) oxaloacetic acid (d) citric acid. Blood from the head, neck and arms enters the heart by | way of the ; (a) superior vena cava (b) inferior vena cava : (c) pulmonary artery (d) pulmonary vein. : In five kingdom system of Whittaker, how many kindgoms contain eukaryotes ? ; (a) 4 (b) 3 ' (c) 2 (d) 1. ; White blood cells that are non-specific killers of microbes are (a) B cells (b) neutrophils ; .(c) killer T cells (d) helper T cells. ; : Veliger larva is found in the phylum (b) enchinodermata The two types of cellular organelles that transform energy ; (a) mollusca ; (c) arthropoda (d) cnidaria. are (a) chromoplasts and leucoplasts ; Messenger molecules, released by virus-infected cells, (b) mitochondria and chloroplasts : that bind to the surfaces of healthy cells and stimulate them to (c) mitochondria and chromoplasts : synthesize proteins that prevent viral reproduction are called (d) chloroplasts and leucoplasts. ; (a) interferons (b) antibiotics 24. Rough ER is well developed in cells engaged in active (a) lipid synthesis (b) secretory function (c) nucleotide synthesis (d) protein synthesis. : (c) : : Streptomycin was first isolated by : (a) Alexander Fleming (b) Selman A. Waksman (c) Howard Florey (d) Ernst Boris Chain! ; The tissues which are dead and occur in mature plant ; bodies are (a) epidermis (b) collenchyma i (c) sclerenchyma (d) parenchyma. ; cytotoxins (d) lymphokines. A mineral is an atom that can be used by an animal in a form that is (a) an organic molecule (b) an inorganic molecule or ion (c) bonded to vitamins (d) bonded to several water molecules. Absorption of glyceral, fatty acids and monoglycerides takes place by (a) lymph capillaries within villi 1 (b) walls of stomach Ecdysis is a common phenomenon in i (c) colon (a) stratified epithelium (b) simple epithelium (c) transitional epithelium (d) pseudostratified epithelium. ; (d) blood capillaries within villi. BIOLOGY TODAY | MARCH '09 Insulin and glucagon, synthesized by the islets of • The fertilization cone, which pulls the sperm into the egg is formed from the Langerhans in the pancreas, reach their target cells via the (a) acrosome of the sperm (b) centriole of the sperm (a) blood (b) lymph (c) vitelline layer of the egg (c) pancreatic duct (d) cystic duct. (d) plasma membrane of the egg. An animal having unsegmented coelomic and radially : Antrum is cavity of symmetrical body with distinct oral and aboral surfaces is a ; (a) ovary (b) Graafian follicle member or (c) blastula (d) gastrula. (a) echinodermata (b) mollusca (c) annelida (d) arthropoda. The unit of magnetic field strength in MRI is (a) megahertz (b) tesla The parts of neuron that receive neurotransmitters and (c) ren (d) hounsfield. passess the action potential towards the soma are The technique of DNA fingerprinting in human was developed for the first time by (a) Laiji Singh (b) Alex Jeffreys Which one of the following characters is not typical of the ; (c) R. Ericson (d) J. Black. class mammalia ? Muga silk is produced by (a) seven cervical vertebrae (b) thecodont dentition (a) Antheraea assamensis (b) Attacus rechinii (c) ten pairs of cranial nerves (d) alveolar lungs. (c) Antheraea paphia (d) Antheraea pernyi. Fishes reared in composite culture fishery in India are In the production of test tube babies (a) salmon and rohu (b) salmon and catla (a) fertilization is external and foetus formation is internal (c) catla and magur (d) rohu and catla, : (b) fertilization is internal and foetus formation is external The part of the hindbrain that is responsible for hand-eye j (c) both fertilization and foetus formation are external coordination is (d) both fertilization and foetus formation are internal. (a) pons (b) hippocampus In mitosis, the number of chromosome sets in daughter (c) medulla oblongata (d) cerebellum. cells will be Which is correctly matched ? (a) half the number in the parent cell (a) apiculture-honey bee (b) pisciculture-silk moth (b) twice the number in the parent cell (c) sericulture-fish (d) aquaculture-mosquito. (c) the same as in the parent cell (d) one fourth the number in the parent cell. The main function of norepinephrine is to increase (a) myelin sheaths (c) axon hillocks (b) axons (d) dendrites. The spindle fibres are attached to chromosomes in the (b) urine production (d) the release of epinephrine. ; region of (a) centrosome (b) chromonema Thyroxine and triiodothyronine, produced by the thyroid i (c) kinetochore (d) all of these. gland, are synthesized from iodine and Genetic information in a DNA molecule is coded in the (a) phenylalanine (b) cholesterol (a) sequence of nucleotides (b) base pairings (c) glycoproteins (d) tyrosine. (c) proportion of each base present Pore of spinning apparatus situated on hypopharynx of silk' : (d) the turning pattern of the helix. moth is called Which enzyme catalyzes the synthesis of a new strand of (a) spinneret (b) spiracle a DNA molecule, by linking nucleotides to the primer strand? (c) gustapore (d) none of these. (a) DNA ligase (b) DNA polymerase How many mature eggs are typically produced by each j (c) DNA primase (d) DNAgyrase. ovary of a nonpregnant woman each year? The genetic code that directs protein synthesis in humans (a) 6 (b) 12 (c) 24 (d) 52. is found in Inflorescence of sunflower is ; (a) no other kinds of organism (a) umbel (b) cyathium (b) virtually in all organisms (c) hypanthodium (d) capitulum. j (c) all animals, but not in plants Menstruation is triggered by an abrupt decline in the ; (d) all multicellular organisms but not in unicellular organisms. amount of j (a) blood pressure (c) cellular respiration (a) luteinizing hormone (c) estrogen Taj Mahal is threatened by pollution from (b) follicle-stimulating hormone • (c) hydrogen (d) S0 2 , (d) progesterone. ; (a) chlorine (b) 0 2 BIOLOGY TODAY | MARCH 09 An organism with two different alleles is | 74. Logistic growth occurs when there is (a) homozygous for that trait (b) homologous for the allele I (a) asexual reproduction only (b) sexual reproduction only (c) heterozygous for that trait(d) heterologous for the allele. i (c) no inhibition from crowding ; (d) a fixed carrying capacity. 65. When a pure strain of tall plants (TT) with round seeds An ecological pyramid of biomass is a representation of (RR) is crossed with a pure strain of short plants (tt) with wrinkled | seeds (rr), an F, generation is produced.The alleles for short and | (a) energy flow through each trophic level . wrinkled are recessive to those for tall and round, respectively. : (b) the amount of living or organic matter present at each trophic level When these F, plants self-pollinate, what proportion of the F2 ; ; (c) populations in each food web generation is short with wrinkled seeds ? ' (d) biotic material in relation to abiotic material. (a) 0 (b) 1 (c) 1 (d) 2 . ! 76. Photochemical smog always contains 16 2 16 : (a) aluminum ions (b) methane 66. A Barr body is a ; (c) ozone (d) phosphorus. (a) supernumerary Y chromosome j 77. Pollination occurs when a pollen grain (b) coiled, inert X chromosome ! (a) matures and has three nuclei (c) extranuclear DNA molecule ; (b) lands on a stigma (d) connection between two X chromosomes. | (c) releases its sperm nuclei 67. Which pair of geographical area shows maximum | (d) releases its sperm nuclei and fertilize with the egg and : polar nuclei. biodiversity in our country ? (a) Eastern Himalayas and Western Ghats ; 78. The function of a fruit is to (b) Sunderbans and Rann of Kutch ; (a) nourish the embryo (c) Eastern Ghats and West Bengal ; (b) cushion the seed when it dehisces (i.e., splits to discharge (d) Kerala and Punjab. seed) 68. lead (a) (c) Errors during DNA replication, repair or recombination can to base-pair substitutions. Such changes are called induced mutations (b) germinal mutations spontaneous mutations (d) somatic mutations. : (c) aid dispersal of the seed | (d) protect the embryo from extreme temperatures. ' i Crossing-over occurs when genetic information is : : exchanged between two (a) chromatids of a chromosome ; (b) long arms of a chromosome j (c) chromatids of two homologous chromosomes : (d) chromatids of two non homologous chromosomes. ; 70. Down's syndrome is found most often when the mother ; is (a) less than 17 years old (b) more than 35 years old (c) already a mother of at least four children (d) having her first child. The struggle for existence is a consequence of (a) each organism leaving more offspring than needed to replace itself (b) innate competitive tendencies (c) . the inevitable difficulty of coping with climatic conditions (d) territories and dominance hierarchies. 72. Peat moss is (a) Sphagnum (c) Riccia (b) Funaria (d) Marchantia, 73. Most of the sponges are (a) bilaterally symmetrical (b) radially symmetrical (c) vertically symmetrical (d) asymmetrical. 16 BIOLOGY TODAY | MARCH '09 79. Senescence in plants can be retarted with the application of (a) gibberellin (b) auxin (c) cytokinin (d) abscisic acid. 80. (a) (b) (c) (d) Gibberellic acid induces flowering in short day plants under long day conditions in day-neutral plants under dark conditions in some gymnospermic plants only in long day plants under short day conditions. Short Answer type Questions ! 1. What advantages does a eukaryotic cell gain by having a : nuclear envelope? | 2. Give reasons why fungi should not be included in Plant | Kingdom ? ; 3. Why is it not possible to use a homozygous dominant ; individual in a test cross to determine the genotype of an ; individual showing the recessive phenotype? i 4. Write the name of different species of human malarial I parasite (Plasmodium) and types of malaria caused by them. j 5. What is an exotic fish? Write the name of three exotic | fishes. Why are biofertilisers or biopesticides preferred over ; chemical fertilisers or pesticides? (a) Both the thin and the thick segments of the ascending limb of Henle's loop transport NaCl out to the interstitial fluid. What is the difference in their respective mode of transport ? (b) Due to developmental abnormality, the wall of left ventricle of an infant's heart is as thin as that of right ventricle. What would be its specific effect on circulation of blood ? Give four advantages of C4 cycle over C3 cycle. What features of flowers facilitate pollination by birds? What is primary productivity? Give brief description of factors that affect primary productivity ? SOLUTIONS 1. 6. 11. 16. (b) (0 (b) (a) (a) 26. (c) 31. (a) 36. (a) (d) 46. (a) 51. (d) 56. (a) 61. (b) 66. (b) 71, (a) 76. (c) 2. 7. 12. 17. 22. 27. 32. 37. 42. 47, 52. 57. 62 67. 72. 77. (b) (d) (c) (c) (b) (a) (a) (b) (c) (d) (d) (a) (b) (a) (a) (b) SECTION A .4. (b) q 8. (d) 13. (b) 14. 18. (d) 19. 23. (b) 24. 28. (c) 29. 33. (a) 34, 38. (a) 39. 43. (d) 44. 48. (a) 49. 53. (b) 54. 58. (c) 59. 64. 63. (d) 68. (c) 69. 73. (d) 74. 79. 78. (c) (a) (c) (b) (a) (d) (a) (b) (a) (d) (a) (b) (0 (c) (c) (d) (c) 5. 10. 15. 20. 25. 30. 35. 40. 45. 50. 55. 60. 65. 70. 75. 80. (b) (b) (b) (c) (b) (d) (a) (a) (a) (d) (b) (a) (b) (b) (b) (d) SECTION B A nuclear envelope in eukaryotes separates events taking place in the nucleus from events taking place in the rest of the cell.This prevents one metabolic pathway from interfering with another and promotes efficiency in the chemical reactions of each pathway. Nuclear envelope also functions to protect the genetic material from damage, by preventing potentially damaging chemicals from gaining access to the chromosome. Fungi differ from plants in their mode of nutrition, reserve food material and composition of cell walls. They are heterotrophic organisms which derive their nutrients mainly by absorption from the surrounding medium due to lack of chlorophyll. They are essentially the decomposers and mineralisers of the biosphere. The reserve food material is glycogen and fat as in animals. The cell wall is generally composed of chitin. Therefore, fungi should not be included in plant kingdom. It is not possible to use homozygous dominant individuals in a test cross to determine the genotype of an individual showing the recessive phenotype, because always dominant gene will express itself. So we will not be able to determine the genotype of a recessive individual. ; : ' : j | ' ; ; ! ; : ; | ' : 4. In human beings malaria is caused by four species of Plasmodium. (i) P. vivax-Benign tertian malaria, incubation period is about 14 days. (ii) P. malariae - Quartan malaria, incubation period is about 28 days. (iii) P. falciparum - Malignant tertian or cerebral malaria, incubation period is about 12 days. (iv) P. ovale - Mild tertian, incubation period is about 14 days. 5. Exotic fishes are those fishes which are imported from other countries and acclamatized in Indian ecological condition and breeding normally here. Three important exotic fishes are (i) Hypophthalmicthys moltix-Silver carp. (ii) Ctenopharyngodon idella - Grass carp. (iii) Cyprinus carpio - Common carp. j ; i ; : ; ; ; ; ; | ; j 6. Biofertilisers or biopesticides are preferred over chemical fertilisers or pesticides because (i) They are biodegradable. (ii) They don't spoil the quality of the soil. (iii) They are less expensive. (iv) They do not pollute the atmosphere. 7. (a) In the descending limb of loop of Henle, because of high osmotic pressure of medullary extracellular fluid, Na + enters the tubule. In the ascending limb of loop of Henle, Na + , K+ and some C f ions are reabsorbed actively. (b) Systemic blood circulation will be affected. 8. The advantages of C4 cycle over C3 cycle are (i) More efficient photosynthesis. (ii) Absence of photorespiration. (iii) Ability to assimilate C0 2 at very low concentrations. (iv) Greater ability to withstand water stress because of the bundle sheath cells being located close to the xylem vessels. 9. The features of bird pollinated flowers are : (i) They produce large amount of nectar. Humming birds feed on the nectar of flowers like Bignonia capreolata. (ii) Bright colours of flowers attract birds from long distances, e.g., Bombax malabarica (Silk cotton). (iii) Another unique feature of these flowers is the presence of certain sticky, thread-like structures in the anther cavity, each holding hundreds of pollen grains. When a bird visits these flowers, the pollen-laden threads get attached to its breast or belly and move with it from flower to flower. 10. Primary productivity refers to the rate of production of biomass or organic matter per unit area over a time period by the producers in an ecosystem. Various factors which affect primary productivity include light, temperature, water, nutrients, etc. In deserts, sunlight is abundant but water is scarce or nutrients are lacking. Therefore, in such areas, water and nutrient supply become the limiting factor. Productivity increases from polar regions towards the tropics because of the increasing sunlight and temperature. • • ; j : ; ; : : : | ; : I : ; i : : ; : : | ' I BIOLOGY TODAY |NOVEMBER'08231 Model Test Paper f • L J ~D) 1. (a) Identify the types of aestivation given in the following figures and also write one example for each aestivation. o (i) O O 0 (ii) (iii) (iv) (b) Write the major differences between each of the following pairs. (i) Hadrocentric and leptocentric vascular bundles. (ii) Primary pieristems and secondary meristems. 2. Fill in the blanks. !!.', is the most common type of embryo sac in angiosperms and was first reported by Strassburger (1879). A fully developed normal type of female gametophyte is (?! nucleated and (?! structure. i.e !?> at micropylar end having two !?>. and one (®! ; three ffi at chalazal end and a central cell having two !?>, in centre. Define the following terms: (a) Pleiotropy (b) Linkage (a) (b) (c) (d) (e) (f) (g) (h) (i) (j) (c) Cistron Match the following columns. Column I Column II Reteroviruses Leucosin (i) Heterocyst (ii) Dipicolinic acid Agar (iii) Streptomyces ramosus Heterothallism (iv) Nostoc Bacterial endospores (v) Reverse transcriptase Terramycin (vi) R. stolonifer Euglenoids (vii) A. mellea Diatoms (viii) Paramylon Amanita (ix) S. griseus Phallus (x) Gracillaria (xi) Chlorella (xii) Toad stool (xiii) Stink horn 5. (a) What is pyramid of energy? What are its characteristics? (b) What is primary productivity? How is it different from net primary productivity? (c) Write a note on cryopreservation. (d) Name one reducing and one non-reducing disaccharide. (e) Write short notes on zwitterion. (f) Name any five polar amino acids with no charge on side chain. 6. Find out the false statement from the following. (a) Main plant body of bryophyta is gametophytic. (b) Eichler divided bacteria and archaebacteria on the basis of differences in r-RNA gene sequence. (c) John Ray introduced the term species. (d) The demerit of Bentham and Hooker's classification is the placement of gymnosperms in between dicots and monocots. (e) In leptosporangiate type of development, sporangium is developed from a group of cells. (f) The ovules of Cycas are orthotropous and unitegmic. (g) Sphaerosomes are associated with the synthesis and storage of fats and oils. (h) Nucleoplasm is the site of r-RNA synthesis. 7 (a) Differentiate between isotype and neotype. (b) Define crossing over and state its essential features. .(c) Why the fresh weight of plant is more in the early morning? (d) Differentiate between chlorosis and necrosis. (e) Number of ATP and NADPH required for fixing one molecule of C0 2 in C3 and C4 pathway. Answer the following questions in one or two words. (a) The phenomenon of having one or more complete sets of chromosomes. (b) The base pair replacements, when one purine is replaced by another purine or one pyrimidine is replaced by another pyrimidine. (c) Plants showing dark acidification. (d) The phenomenon that takes place in chloroplast, peroxisome and mitochondria. (e) The enzyme of Krebs' cycle which is found attached to inner mitochondrial membrane. (f) Development of embryo from egg without fertilization. (g) Photoperiodism was first studied by. 232 BIOLOGY TODAY | APRIL 09 232 Polymerase chain reaction (ix) IgA Cyclosporin-A (x) Interferon (xi) Aspergillus niger (xii) a-sorbose (xiii) Penicillium sp. (h) The precursor of ethylene in all higher plant tissues. (i) Name any two antitranspirants. (j) Who has developed the technique of haploid culture? 9. (a) Calculate the number of gametes and genotype, if a cross is made between AaBb x AaBb. (b) Why Krebs' cycle is known as an amphibolic pathway? 10. Answer the questions based on following figures. 12. Differentiate between following pairs. (a) Immunogens and Immunoglobulins. (b) Plasmid DNA and chromosomal DNA. 13. Fill in the blanks. rocks. (a) Most fossils are found in The pelvis and the leg bones of a snake are (b) Evolution is a change, over time, in the frequency of (c) within a caused by differential reproduction in response to local environmental conditions. (d) A change in the relative abundance of an allele within a population, over a succession of generations, is called If the frequency of one allele is p then the frequency of the alternative allele in the population is (f) Genetic drift in a new colony is known as the effect. (g) Diversity of genotypes at a single location is called variation, whereas diversity of genotypes over a broad region is called variation. (h) The formation of two species from one ancestral species is known as (i) Populations with overlapping geographic ranges are known populations in the areas of overlap. (j) as is the earliest era in the geologic record. (e) Label the parts marked as 'p' and 'q' in figure (1) showing female branch of Funarial (b) Which type of sclereid is shown in figure(2)? (c) Which type of ovule is shown in figure (3)? Give an example. 11. Match the following columns. Column I Plague Secretory immunoglobulin Single cell protein Heterosis Citric acid DNA polymerase (g) Antiviral (h) Vitamin C (a) (b) (c) (d) (e) (f) 16 (i) (ii) (iii) (iv) (v) (vi) (vii) (viii) Column II Fusarium graminearum G.H.shull Trichoderma polysporum |3-carotene Yersinia pestis Kary Mullis IgE A.Kornberg BIOLOGY TODAY |MARCH'09 14. Match the following columns. Column II Column I (a) Hydraulic skeleton (i) Urochordata (b) Rhabditiform larva (ii) Hirudinea Trochophore larva (iii) Arthropoda (c) (d) Balanoglossus (iv) Cyclostomata (v) Bony fish (e) Botryoidal tissue (vi) Cephalochordata (f) Lancelet (vii) Hemichordata (g) Silver fish (viii) Molluscs (h) Bombay duck (ix) Earthworm (i) Hagfish (j) Retrogressive (x) Ascaris metamorphosis 15. (a) Differentiate between spermatogenesis and oogenesis. (b) Explain the functions of the following. (ii) Sertoli cells (i) Prostate glands Leydig cells (iv) lUDs (iii) Amniocentesis. (v) ( 0 Mention three sexually transmitted diseases and their causative organisms. 16. Explain the following according to the given instructions. (a) Endocrine glands and exocrine glands - Differentiate according to function and structure. (b) Vital capacity and total lung capacity - Differentiate between them. (c) Diabetes insipidus and Diabetes mellitus - Differentiate according to their cause and glands affected. 17. (a) What do you mean by chemical synapse and electrical synapse? (b) What is saltatory conduction and why it is called so? (c) What is hepatic portal system? 18. Refer the given figure to answer the questions given below? sA stimulates release of bile and pancreatic enzymes. (c) The represents the electrical excitation of the atria. (d) When muscle contracts energy within ATP is converted to the energy of movement. (e) The end of marks the end of systole. (f) The ions that stimulate muscle contraction are stored within the a' special form of They are released into the cytoplasm in response to in the plasma membrane. ANSWERS 1. (ii) (iii) (iv) (a) (i)Valvate aestivation, e.g., Brassica. Twisted aestivation, e.g., Hibiscus. Ascending imbricate, e.g., Cassia. Descending imbricate or vexillary, e.g., Pisum. (b) (i) Hadrocentric (Amphicribal) V.B ®€>J(A) 1. Here phloem surrounds In this type of vascular the xylem and xylem bundle; xylem surrounds forms a central core. the phloem completely, and phloem forms a central core. 2. These are frequently found This type is found in some in ferns, in some leaves of monocotyledons, in Yucca dicotyledons and in some and in Dracaena. aquatic angiosperms. 3. They are also called They are also called endophloic or ectoxylic. endoxylic or ectophloic. (C) (B) (a) Identify A, B, C and D. (b) What is the function of 'A' and 'C'? 19. The given figure shows T.S. of adrenal gland. Refer the figure and answer the questions given below. Leptocentric (Amphivasal) V.B (ii) Primary meristems (a) Name two hormones of 'B'. (b) Give three important differences between A' and 'B'. (c) Name one disease each caused by hyper and hypo secretion of hormones by A'. 20, Fill in the blanks with suitable words given below QRS, cholecystokinin, chemical, T-wave, mechanical, P wave, secretin, ATP, ER, action potential, creatine phosphate, sarcoplasmic reticulum, motor units, duocrinin. (a) Heart beat rate can be determined by counting the number of complexes. (b) Two hormones stimulate release of digestive materials; stimulates release of bicarbonate ions; and Secondary meristems 1. These are the primary These are formed after products of promeristem. some growth in primary permanent tissue. 2. Central absent. 3. Usually give rise to Give rise to secondary primary tissues except tissues e.g., interfascicular intrafascicular cambium. cambium in stem, cambium in roots etc. vacuoles are Cells possess vacuoles. 1. Polygonum type 2. eight 3. seven-celled 4. egg apparatus 5. synergids 6. egg cell 7. antipodal cells 8. polar nuclei. central BIOLOGY TODAY | APRIL 09 234 3. (a) The ability of a gene to have multiple phenotypic effect because it influences a number of characters simultaneously is known as pleiotropy. Hereditary disease sickle-cell anaemia is an example of pleiotropy. (b) Linkage is the tendency for two different genes on the same chromosome to remain together during the separation of homologous chromosomes at meiosis. (c) Cistron is a length of DNA that contains the information for coding a specific polypeptide chain or a functional RNA molecule (i.e., transfer RNA or ribosomal RNA). 4. (a) - (v), (b) - (iv), (c) - (x), (d) - (vi), (e) - (ii), (f)-(iii), (g) - (viii), ( h ) - ( i ) , (i) - (xii), (j) - (xiii). 5. (a) Pyramid of energy is a graphic representation of amount of energy trapped per unit time and area in different trophic levels of a food chain with producers forming the base and top carnivores the tip. The energy content is expressed as kcal/m2/yr or KJ/m2/yr. These are most fundamental and indicate overall nature of ecosystem. Pyramid of energy is always upright in all types of ecosystem as energy goes on decreasing with each and every trophic level. (b) The amount of energy accumulation in green plants as biomass or organic matter per unit area over a time period through the process of photosynthesis is known as primary productivity. Thus primary productivity is the rate of synthesis of organic matter by producers whereas net primary productivity is the amount of organic matter stored by producers per unit time and area. Besides primary productivity is comparatively quite high. (c) Dry, freezed storage of germplasm at-196°C (liquid nitrogen) is called cryopreservation. Under these conditions, there is near stoppage of all biological activities and further there are no chances of genetic changes. This method is not used for plant germplasm. (d) Reducing disaccharide is maltose and non-reducing disaccharide is sucrose. (e) Zwitterion (or dipolar ion) is a hybrid molecule containing positive and negative ionic groups. The amino acids rarely exist in a neutral form with free carboxylic (-COOH) and free amino (-NH 2 ) groups. In strongly acidic pH (low pH), the amino acid is positively charged (cation) while in strongly alkaline pH (high pH), it is negatively charged (anion). Each amino acid has a characteristic pH (e.g., leucine, pH 6.0) at which it carries both positive and negative charges and exists as zwitterion. (f) The five polar amino acids with no charge on side chain are - glycine, serine, threonine, glutamine and asparagine. 16 BIOLOGY TODAY |MARCH'09 6. (a) - True. (b) - False. (c) - True (d) - True (e) - False (f) - True (g) - True (h) - False 7. (a) If several plants are collected at the same time, one is the holotype and others are designated as isotypes, i.e., isotype is duplicate of holotype. When all the material on which description of new species based is missing, then the new specimen or element selected to serve as nomenclatural type is called neotype. (b) Crossing over is an exchange of portions of chromatids between two non-sister chromatids of homologous chromosomes. The essential features of crossing over are as follows: (i) Only two of the four chromatids cross over, while the other two chromatids preserve their original constitution. (ii) The crossing over occurs between the nonsister chromatids of the homologous pair of chromosomes. (iii) The number of chiasmata per set of chromosomes depends upon the length of chromosomes. The longer are the chromosomes, the greater is the number of chiasmata. (iv) Chances of crossing over are more if the genes are located farther apart. The more is the distance between the genes, the greater is the opportunity of chiasma formation. (c) The fresh weight of a plant is more in the early morning due to accumulation of water in the cells and absence of transpiration in the previous night. (d) Chlorosis Necrosis 1. The yellowing of leaves due to reduction of chlorophyll content is known as chlorosis. The death of a cell or a group of cells while still a part of the living plant is known as necrosis. 2. It is caused due to the It is caused due to the deficiency of magnesium, deficiency of copper, sulphur, iron, manganese calcium and chlorine. and nitrogen. (e) For fixing one molecule of C0 2 the number of ATP and NADPH required in C3 pathway are three and two respectively, whereas in C4 pathway five molecules of ATP and two molecules of NADPH are required. 8. (a) (c) CAM plants. Euploidy. (e) Succinate dehydrogenase. (g) Garner and Allard (b) Transitions. (d) Photorespiration. (i) Parthenogenesis (f) Methionine. (h) Phenyl mercuric acid (PMA) i& ABA. (j) Guha and Maheswari. (a) As the cross is made between AaBb x AaBb, it is a dihybrid cross containing two traits (n). yc Types of gametes = 2" = 22 = 4 Number of genotypes = 3" = 3 2 = 9 AaBb x AaBb I I gametes AB, ab, Ab, aB AB, ab, Ab, aB The four types of gametes AB, ab, Ab, aB (b) Krebs' cycle is the amphibolic pathway that shows both catabolism as well as anabolism. The most important role of Krebs' cycle is to provide energy for various catabolic processes in plants. It also provides carbon skeleton or raw materials for various anabolic processes as many intermediates of Krebs' cycle are further metabolised to produce amino acids, proteins, nucleic acids or other important metabolites. For example, succinyl CoA is used for synthesis of aromatic porphyrins which give rise to cytochrome, phytochrome and head of chlorophyll molecule; oxalo acetic acid gives rise to aspartate and a-ketoglutarate gives rise to glutamate. AB ab Ab aB AB AABB AaBb AABb AaBB ab AaBb aabb Aabb aaBb Ab AABb Aabb AAbb AaBb aB AaBB aaBb AaBb aaBB Nine types of genotypes are AABB, AaBb, AABb, AaBB, aabb, Aabb, aaBb, AAbb, aaBB. (a) Capsule and calyptra (b) Astrosclereid (c) Hemianatropous ovule, e.g., Ranunculus. ( a ) - ( v ) , (b) - (ix), ( c ) - ( i ) , ( d ) - ( i i ) , (e) - (xi), (f) - (viii), (g) - (x), (h) - (xii), (i) - (vi), (j) - (iii). . (a) Antigens (Immunogens) Antibodies (Immunoglobulins) 1. They are usually foreign materials which bring about They are biochemicals formed in the body for combating reaction in the body. antigens. 2. They trigger the formation of antibodies. 3. Antigens are either proteins or polysaccharides and Antibodies are proteinaceous in nature. substances which can get attached to them. 4. They are free molecules or components of surface covering They are extruded from the surface of plasma cells and become of microbes. component of plasma. 5. They produce diseases or allergic reaction. They have a variable site (v-region) for attaching to antigen. They are protective, causing immobilisation or lysis of antigenic materials. (b) Plasmid DNA Chromosomal DNA 1. It is always double stranded. It may be single stranded or double stranded. 2. It is circular. It is linear or circular. 3. It is naked without histone protein. It is coated with histone protein. 4. It does not carry any vital gene necessary for cell. It carries vital genes necessary for cell. 5. It can replicate independent of main genome. It replicates with genome. 6. It does not act as genetic factor. It acts as genetic factor. 7. Introns are absent. Both exons and introns present. (a) sedimentary. (b) vestigial structure. (c) an allele, population. (d) microevolution or adaptive evolution. (g) individual, geographic, j (h) cladogenesis or divergent evolution. ; (i) sympatric. (j) Precambrian. (e) 1-p. (f) founder. I i (a) - (ix), (b) - (x), (c) - (viii), (d) - (vii), (e) - (ii), (f) - (vi), (g) - (iii), (h) - (v), (i) - (iv), (j) - (i). BIOLOGY TODAY | APRIL 09 236 (a) Oogenesis Spermatogenesis 1. Growth phase is short so that spermatocytes are only Growth phase is very long so that oocytes are much larger twice the size of spermatogonia. than oogonia. 2. A primary spermatocyte divides equally to form two similar A primary occyte divides unequally to form one large secondary oocyte and one minute polar body. secondary spermatocytes. 3. A secondary spermatocyte also divides equally, forming A secondary oocyte also divides unequally, forming one large two similar spermatids. ootid and one minute polar body. 4. Upto the formation of spermatids, the cells often remain Oogonia are separate and surrounded by follicle cells. interconnected. 5. A spermatogonium spermatozoa. 6. Spermatogenesis is usually completed in the testes so that Oogenesis is often completed in the reproductive tract of the female or even in water as oocytes leave the ovaries. mature sperms are released. produces four functional An oogonium produces one functional ovum, and three non functional polar bodies. fertilization of the egg or implantation of the embryo, (v) Amniocentesis is a technique which is used to detect foetal sex based on the chromosomal pattern in the amniotic fluid surrounding the developing embryo, (c) The three sexually transmitted diseases and their causative organisms are given below : (i) AIDS —» Human immunodeficiency virus (ii) Gonorrhoea Neisseria gonorrhoeae (iii) Syphilis —> Treponema pallidum. (b) (i) Prostate gland provide milky alkaline fluid for the nutrition of sperms in seminal vesicle. (ii) Sertoli cells, the functional component of seminiferous tubules functions as nurse cells for differentiating spermatozoa. (iii) Leydig cells or interstitial cells synthesize and secrete testicular hormones called androgens. (iv) lUDs or intrauterine devices are plastic or metal objects placed in the uterus by doctors which prevent the (a) Endocrine glands Exocrine glands 1. Exocrine glands are referred as glands with ducts. 2. The secretion acts locally near the site of its formation and The secretion is known as hormone and passes directly into is carried through ducts. , the blood or extracellular fluid. The hormone exerts its effect on target organ. 3. It helps in the process of digestion, absorption, and It influences not only the metabolic process but also regulates metabolism. body growth, sexual functions etc. (W _ Endocrine glands are referred as the ductless glands. ; Vital capacity _ • Total lung capacity 1. It is the amount of air which one can inhale and exhale It is the total volume of air accomodated in the lungs and the with maximum effort. respiratory passage after a maximum inspiration. 2. It is the sum of expiratory reserve volume, tidal volume and inspiratory reserve volume. It is the sum of vital capacity and residual volume. 3. It varies from 3400 - 4800 ml. It varies from 5 0 0 0 - 6 0 0 0 ml. (c) Diabetes mellitus 1. It is due to deficiency of insulin.. Diabetes insipidus It is due to deficiency of ADH. •. ; 2. The blood sugar becomes high and glucose appears in The blood glucose is normal and glucose does not appears in the urine. the urine. 3. There is high blood cholesterol and ketone body formation. There is no such phenomenon. 4. Pancreatic disorder. Hypothalamic disorder. BIOLOGY TODAY | APRIL 09 237 (a) In an electrical synapse, action potentials move from presynaptic to postsynaptic membranes in a fashion similar to the conduction of the impulse along an axon. In such a junction, the synaptic cleft is so narrow that electric currents generated by the action potentials in the presynaptic membrane flow across the gap (through a gap junction) to the postsynaptic membrane, where they affect voltage-sensitive ion channels and produce action potentials. Such synapses are found in invertebrates and vertebrates. In chemical synapses, the synaptic cleft is too wide for electric current to pass directly between the membranes. Instead, the action potential message is transmitted to the postsynaptic membrane by a variety of neurotransmitter molecules that diffuse across the cleft. (b) The axons of vertebrate neurons are myelinated, and thereby insulated, by glial cells that have their plasma membranes wrapped tightly around the axons. However, the nodes of Ranvier - each located at the junction of two glial cells - are exposed. With the axon insulated by myelination except at the nodes of Ranvier, the action potential jumps from node to node (saltatory) instead of moving continuously along the axon. It jumps in this way because the lateral flow of Na + ions from each action potential can only depolarize adjacent membrane at the uninsulated nodes. This movement from node to node is called saltatory conduction and it is much faster and more energy-efficient-than conduction in unmyelinated axons of the same diameter. (c) Hepatic portal system is a system made of a portal vein and the capillary complex formed by it in a liver. It occurs in all vertebrates. Posterior mesenteric, anterior mesenteric, duodenal and lineogastric join to form hepatic portal vein. It pours blood from digestive system into the liver. This blood is collected by hepatic veins and poured into post caval to be returned to the heart. This system function as a short circuit for (i) Removal of glucose, amino acids and other nutrients. (ii) Deamination of extra amino acids and conversion of harmful ammonia into urea. (iii) Separation of chemicals and their detoxification. (iv) Direct pouring of liver product into venous blood. (a) A - neurotransmitter B - synaptic cleft C - synaptic vesicles D - presynaptic membrane (b) Function of 'A' - » Neurotransmitter is a chemical that mediates transmission of a nerve impulse across a synapse or a neuromuscular junction. The neurotransmitter is released at the synaptic knob at the tip of the axon into the synaptic cleft. It diffuses across the opposite membrane (the postsynaptic membrane), where it stimulates receptors and initiates the propagation of a nerve impulse in the next neuron. At a neuromuscular junction, the neurotransmitter transmits impulses to the muscle-fibre membrane. Function of 'C' —> This stores neurotransmitter. (a) The two hormones of 'B' are - adrenaline and noradrenaline. (b) A (Adrenal cortex) B (Adrenal medulla) 1. It is external firm region It is central soft region of the of the adrenal gland. adrenal gland. 2. Itconsists ofBconcentric regions: outer zona glomerulosa, middle zona fasciculata and inner zona reticularis. It is not differentiated into regions. Instead it consists of glandular cells called chromaffin cells or phaeochromocytes which synthesize and store catecholamines in a extensive population of secretory granules. 3. It secretes 3 groups of hormones (collectively called corticoids) : mineralocorticoids, glucocorticoids and sexcorticoids. Chromaffin cells secretes 2 similar hormones: noradrenaline and adrenaline (catecholamines). (c) Hyper and hypo secretion of hormones by A' causes Cushing's syndrome and Addison's disease respectively (i) Cushings syndrome —> Occurs by excess of Cortisol. (ii) Addison's disease —> Caused by the deficiency of mineralocorticoids and glucocorticoids. (a) QRS (b) secretin, cholecystokinin (c) P - wave (d) chemical, mechanical. (e) T - wave (f) sarcoplasmic reticulum, ER, action potentials. eXPLORGR 10 Model Test Papers 1994-2008 Expert's Solved Papers f t l s s f w |eXPtOR€R Art; 500+ General Knowledge 1300+ Assertion & Reason | M T G BOORS 503, Taj Apt., Ring Road Near Safdarjung Hospital New Delhi- 110 029 Tel.: 46686000 H I ! I"!!'.' 1 :!.! H l i I P B BIOLOGY TODAY | APRIL 09 238 Model Test Paper rp Lb Exam on 3 r d May 2009 e n The term "New Systematics" was introduced by (a) Linnaeus (b) A.P. Candolle (c) Julian Huxley (d) Bentham and Hooker. (c) C0 2 concentration in arterial blood (d) 0 2 concentration in venous blood. Branched chain lipids occur in the cell membrane of (a) archaebacteria (b) mycoplasma (c) actinomycetes (d) streptomyces. (a) (c) Young leaves of fern are protected by (a) ramenta (b) indusium (c) sori (d) rhizome. Dry indehiscent, single seeded fruit formed from bicarpellary syncarpous inferior ovary is (a) cypsela (b) caryopsis (c) cremocarp (d) berry. Motor cells take part in (a) guttation (c) inrolling (a) (c) (b) transpiration (d) all of these. Ribosomes are attached to ER through ribophorins (b) rRNA fRNA (d) hydrophobic interaction. Insulin and glucagon are transported to target organ by lymph (b) blood pancreatic duct (d) cystic duct. Angiotensin stimulates adrenal cortex to secrete aldosterone which increases reabsorption of (a) sodium (b) potassium (c) calcium (d) magnesium. Number of floating ribs in human body is (a) 6 pairs (b) 2 pairs (c) 5 pairs (d) 3 pairs. Coordination of voluntary muscle activity is connected with (a) cerebrum (b) cerebellum (c) medulla oblongata (d) crura cerebri. Glands similar to sebaceous ones and present on the eye lids are (a) lacrimal (b) ceruminous (c) meibomian (d) pituitary. Which enzyme is used to prepare baby food ? (a) amylase (b) trypsin (c) lactase (d) rennin. FSH is formed by (a) posterior pituitary lobe (c) adrenal cortex Which chemical compound is used to demonstrate transpiration from foliar surface ? (a) MgCI2 (b) CoCI2 (c) FeCI2 (d) CaCI2. Snakes poisonous gland are modified (a) oil gland (b) lacrymal gland (c) salivary gland (d) thyroid gland. Premature leaf fall is due to deficiency of (a) sodium (b) potassium (c) zinc (d) phosphorous. Which one is not electron transport chain poison ? (a) antimycin (b) cyanide (c) 2:4 dinitrophenol (d) DCMU. Ethylene is connected with (a) aerobic respiration (b) climacteric respiration (c) anaerobic respiration (d) fermentation. (a) (b) (c) (d) Chylomicrons that enter the lacteals are composed of triglycerides alone triglycerides around a protein core protein coat around triglycerides proteins alone. The respiratory centre in the brain is stimulated by (a) C0 2 concentration in venous blood (b) 0 2 concentration in arterial blood BIOLOGY TODAY ARPIL 09 (b) middle pituitary lobe (d) anterior pituitary lobe. The first case of IVF-ET technique success, was reported by (a) Bayliss and Starling Taylor (b) Robert Steptoe and Gilbert Brown (c) Louis Joy Brown and Banting Best (d) Patrick Steptoe and Robert Edwards. The term sarcode for living matter was used by (a) Purkinje (b) Dujardin (c) Hooke (d) Brown. Wet scrubber is used in controlling (a) water pollution (b) air pollution (c) noise pollution (d) radioactive pollution. (a) (c) Keoladeo National Park is situated in Bharatpur (b) Pondicherry Chandrapura (d) none of these. Top of ecological pyramid is occupied by (a) producers (b) decomposers (c) carnivores (d) herbivores. Identify the odd one (a) Trapa (c) Marsitea (b) Nelumbo (d) Typha. Reptilian feature of Archaeopteryx is (a) U-shaped furcula (b) beak (c) weak sternum (d) feathers. Patau's syndrome disease is related to (a) chromosome 18 (b) chromosome 13 (c) chromosome 19 '(d) chromosome 22. Archenteron is the future (b) proctodaeum (a) stomodaeum (c) cavity of alimentary canal (d) coelom. Artificial allopolyploid Raphanobrassica was created by (a) Zech (b) Muntzing (c) Winkler (d) Karpenchenko. 42. Which cell organelle is absent in human sperm ? Khorana deciphered the triplet codons of (a) tyrosine and tryptophan (b) cysteine and valine (c) serine and isoleucine (d) phenylalanine and methionine. 43. Exine is made up of Which ancestor of man for the first time began the bipedal locomotion ? (a) Cro-Magnon man (b) Australopithecus (c) Java-ape-man (d) Peking man. (a) runner (c) bulb HIV attacks which of the following ? (a) B cells (b) T cells (c) antigen presenting cells (d) T helper cells. Praunitz and Kustner (PK) reaction is related to (a) IgM (b) IgD (c) IgA (d) IgE. Plants can be made disease resistant through (a) colchicine treatment (b) X-ray treatment (c) breeding with wild relatives(d) hormone treatment. Mule is produced by (a) selection (b) inbreeding (c) interspecific hybridisation (d) cross-breeding. Pyrethrum is obtained from (a) Chrysanthemum marshallii (b) C. cinerarifolium (c) C. coccineum (d) none of these. Which of the following is referred to as 'molecular glue'? (a) DNA-ligase (b) DNA-polymerase (c) restriction enzyme (d) topoisomerase. The new strain of bacteria produced by biotechnology in alcohol industry is (a) Escherichia coli (b) Saccharomyces cerevisiae (c) Bacillus subtilis (d) Pseudomonas putida. A DNA library constitutes (a) all the genes in a gene pool (b) all the genes sequenced so far (c) a collection of all the DNA fragments of an organism inserted in plasmids (d) a DNA fragment inserted in a phage. (a) (b) (c) (d) Genetic diagnosis by DNA testing detects only mutant and normal alleles can be done only on eggs or sperms involves hybridization to ribosomal RNA utilizes restriction enzymes and a polymorphic site. (b) mitochondria centrioles. (a) ER (c) nucleus (a) cellulose (c) sporopollenin (b) lignin (d) lignocellulose. 44. Bryophyllum has asexual reproductive bodies namely (b) sucker (d) adventitious buds. Clover leaf life model of f-RNA was given by (a) Klug (b) Gatton (c) Holley (d) Garrod. Annual rings are distinct in plants, which grow in (a) grassland (b) tropical regions (c) temperate regions (d) arctic regions. Coelom in Ascaris lumbricoides is (a) true coelom (b) schizocoelom (c) pseudocoelom (d) all of these. Homologous chromosomes begin to repel during (a) diplotene (b) diakinesis (c) zygotene (d) leptotene. A diagram showing the ancestral relationship and transmission of genetic traits over several generations in a human family is known as (a) karyogram (b) pedigree (c) patrotype (d) punnet square. The marriage between blood relations and cousins should be prohibited because (a) it will not prove successful (b) it reduces the reproductivity (c) it increases the probability of increasing the transmission of defective germplasm (d) none of these. (c) (a) (b) (b) (d) (d) (d) (a) (0 (c) (a) (b) (c) (a) (b) (b) (d) (c) (a) (c) (a) (b) (c) (c) (b) (d) (c) (c) (c) (a) 4, 9, 14. 29. . 34. 44, •49. (a) (d) (b) (d) (a) (b) (c) (d) (d) (b). 10, 15. 20. 25. 40! 45. 50, BIOLOGY TODAY | APRIL 09 (c) (d) (a) (c) (c) (b) (b) (c) (c) (c) •i 75 CBSE-PMT MAINS 2009 v v««\ H M M M K » .nnwiMiMavitmMM^ Veri-Similar Practice Paper-1 - Prof. Siddharth Identify the following structures (A, B, C, D, E) and parts (a, b, c, d, e) associated with them? Sanghvi The given box represents different bones of different location in humans. The diagram represents a human ventral body segments A-G. Put the appropriate bone in A-G segment on the basis of their location. 1. vertebral column 2. sternum 3. two articulation surfaces of ribs 4. frontal 5. mandible 6. scapula . 7. clavicle 8. ilium, ischium and pubis. 9. carpals 10. femur 11. patella 12. tarsal 13. metatarsal 14. calcaneus Ventral body structure of human V V The following diagrams show some representative methods of conidium production in mitosporic fungi. Identify the name of fungi. Phialides Conidiophore 1 — 4, Give the answers of following questions on the basis of given diagrams. 5- Fill in the blanks from given options. peptones, malic acid, thigmonastic, seismonasty, sucrose, epinasty, hyponasty. (a) Greater growth on the abaxial side is called and on the adaxial side is called (b) Irreversible opening of flowers during blossoming is caused by growth. Closing of flowers is due to growth. (c) Bending of tentacles in sundew or Drosera after coming in contact with an insect is movement of variation. (d) The leaves of sensitive plant Mimosa pudica (touch me not) show (e) Spermatozoids show chemotaxistowards and in archegonia of moss and fern respectively. (f) Bacteria are attracted towards Match column A with column B. Column A (A) (B) Column B 1. Albumins (a) Soluble in water and are storage in nature 2. Globulins (b) Leucosin from wheat 3. Glutelins (c) Ricin from castor seeds 4. Prolamines (d) Insoluble in water but soluble in 5% NaCl solution 5. Sderoprotein (e) Arachin in groundnuts (f) Insoluble in water and soluble in weak acids/alkalies (g) Oryzenin in rice Ananas M o c a r p u s (Jack fruit) (D) (E) (a) Write the type of fruit in A and structure X representing (b) Write the type of fruit in B and ploidy level of aleurone layer in maize is (c) Write the type of fruit and inflorescence in C. (d) Write the type of fruit in D and identify Y. (e) Write the type of fruit in E and write the name of genetically modified tomato. (h) Insoluble in water and soluble in 70% alcohol (i) Hordein in barley (i) Salmin in sperms of salmon fish (k) Insoluble in water and soluble in strong acids/alkalies (I) Fibroin and sericin from silk. Select five true statements. (a) Catecholamines stimulate the breakdown of glycogen resulting in an increased concentration of glucose in blood. (b) Glucocorticoids stimulate gluconeogenesis, lipolysis and proteolysis; and inhibit cellular uptake and utilisation of amino acids. (c) Glucocorticoids, particularly Cortisol, produces antiinflammatory reactions and suppresses the immune response. (d) Ovary produces two groups of steroid hormones called androgen and testosterone. (e) Estrogens produce wide ranging actions such as stimulation B I O L O G Y TODAY | APRIL 09 75 of growth and activities of female secondary sex organs, development of growing ovarian follicles, appearance of female secondary sex characters (e.g., high pitch of voice, etc.), mammary gland development. (f) Progesterone supports pregnancy. Progesterone also acts on the mammary glands and stimulates the formation of alveoli (sac-like structures which store milk) and milk secretion. (a) (b) (c) (d) (e) Give the answers of following questions. Write the name of protein present in primary cell wall. Write the components of primary cell wall. Write the compostion of macrofibril of cell wall. Write the orientation of fibrils in primary cell wall. Identify part A, B, C, D. 7. Sigma factor TATA box g h Shine-Dalgarno sequence 8. 9. UAA i Nucleotide found in tRNA anticodons 10. UAG j Start signal for translation k Used to attached at 18S r-RNA I Amber Used to attached at 16S r-RNA m Termination codon 11, Fill in the blanks with the name of grasslands. (a) North America: the of the central lowlands and high plains of the US and Canada. (b) Eurasia: the from Ukraine eastward through Russia and Mongolia. (c) South America: the of Argentina and Uruguay (d) Africa: the in the Republic of South Africa. (e) The of Hungary. 1? Match column A with column B. Column A (a) (b) (c) (d) (e) Give the answers of following questions. Number of chromosome groups at each equatorial plate of metaphase I of a plant having 2n = 60 chromosome, will be? How many times a cell should divide to produce 128 cells? How many number of mitotic division required to produce 128 cells? An egg cell has 5 pg of DNA in its nucleus. How much amount of DNA will be in this animal at the end of G2 phase mitosis ? For producing 100 seeds we require how many meiosis? 10, Match column A with column B. Column A 1. AUG codon 2. Polycistronic mRNA mmm snRNP Column B • Feature of eukaryotic mRNA b Induced by proflavin dyes c Part of E. coli RNA polymerase holoenzyme 4. Inosine d Product of operon transcription 5. AGGAGGU e DNA binding site for RNA polymerase 6. -Methyl guanosine f Component of spliceosome BIOLOGY TODAY | APRIL 09 243 1. Rat flea Column 8 (a) Sepia 2. Silver fish (b) Umax 3. Scorpion (c) Lepisma 4. Cuttle fish (d) Xenopsylla cheopsis [5, Grey slug (e) Palamneus Define the following terms, (a) Sanguivorous (b) Benthos (c) Anadramous (d) Cannibals (e) Metameric segmentation 14, Fill in the blanks. (a) Severe constricting pain in the chest, often radiating to the left shoulder and arm and or to the jaw due to myocardial ischemia is called (b) Communications between vessels, as between the smaller arteries that supply the heart muscle is called An increase in their size and number provides a collateral circulation to regions of the myocardium threatened with ischemia by gradual narrowing of a larger artery. (c) A technique in which a catheter with a small balloon at the distal end is inserted into a diseased coronary artery. The balloon tip is inserted through the lesion and the balloon positioned at the center of the lesion. The balloon is then inflated with a solution of contrast material to allow visualization under fluoroscopy. The inflation of the balloon compresses the atheromatous plaque against the side of the arterial wall, improving blood flow through the previously stenotic vessel. This technique is known as (d) The thin membrane which is the inner lining of the cardiac chambers is (e) The percentage of whole blood volume occupied by the red cells following centrifugation of blood is 15. Ribonudease and deoxyribonuclease are produced in this structure 17. Match column A with B. Column A Column B 1. Rotenone (a) Inhibits terminal electron transfer to oxygen, Complex IV 2. Antimycin A (b) Inhibits complex I, rat poison and insecticide. 3. Cyanide (c) Inhibits cytochrome oxidase by competing with an oxygen- binding site, Complex IV. 4. Carbon Monoxide (d) Bind protons, are hydrophobic and can dissipate a pH gradient by equilibrating H + (e) An antibiotic which blocks complex III. 15. Match column A with column B. Column A 1. Column B Diaphragms, cervical (a) caps and vaults Devices are inserted bydoctors or expert nurses in the uterus through v gina. 2. Condoms (b) Developed by CDRI 3. Intra Uterine Devices (0 In male -'vasectomy' 4. Saheli (d) Reusable 5. Sterilisation (e) Barrier methods (f) Once a week (g) (h) Non-steroidal preparation CuT, Cu7, Multiload 375 (ii) It has two articulation surfaces on its ventral end and is hence called bicephalic. (i) In female, -'tubectomy' (iii) First seven pairs of ribs are called true ribs. (j) Nirodh (iv) Ventrally, they are attached to the thoracic vertebrae and dorsally connected to the sternum with the help of hyaline cartilage. Select the correct answer for the following statements from the given list (Items A to D may be used more than once). A. Large intestine B. pancreas C stomach D. small intestine 5. Uncouplers 18. Select true and false statements. (i) There are 12 pairs of ribs. Each rib is a thin flat bone. (v) The 8th, 9th and 10th pairs of ribs do not articulate directly with the sternum but join the seventh rib with the help of elastic cartilage. These are called vertebrochondral (false) ribs. 2. Enterokinase is secreted by cells in this structure (vi) Last 2 pairs (11 and 12th) of ribs are not connected dorsally and are therefore, called floating ribs. 3. Peyer's patches are present in the wall (vii) Ribs and sternum together form the rib cage. 4. Rugae may be present on the luminal surface (viii) The bones of the limbs alongwith their girdles constitute the axial skeleton. 1. Villi are present in this structure 5. Sucrase, lactase and maltase are produced by cells in this structure 6. Haustra are typical features of this structure 19. Give the answers of following questions. 7. Taeniae coli are present in this structure (i) Write the complete name of structure Z which is monosporic 7 celled and 8 nucleated. 8. Pepsinogen is produced by cells in this structure (ii) Write the name of structure A, B, C, D, E, F. 9. Contains the islets of Langerhans 11. Parietal and chief cells are present in the walls (iii) Triple fusion is a result of fusion of part and and syngamy occurred due to fusion of part and 12. The jejunum is part of this structure (iv) Write the name of X and Y end. 13. Aminopeptidase is produced by cells in this structure (v) Write the name of growth factors required for pollen tube growth. 10. The cardia and fundus are regions of this structure 14. Lipase is produced by cells in this structure BIOLOGY TODAY | APRIL 09 75 Match the options of column A with column B. Column B Column A 1. Auxin (a) Associated with the breaking of apical dominance 2. Cytokinin (b) Thought to cause acidification of the cell wall 3. Gibberellin (c) Produced by the embryo of a cereal grain and moves to the aleurone layer 4. Abscisic acid (d) Application of this hormone to shoot cuttings will enhance the formation of roots 5. Ethylene (e) Delays senescence of leaves (f) Promotes the differentiation of vascular tissue (q) Prevents K + uptake by guard cells. (h) High levels of this hormone are produced during tomato fruit ripening. (i) induce epinasty .(i) Richmond lang effect (k) 6-furfuryl aminopurine (I) Dormin (m) Avena curvature test .(n) (o) Bakanae disease Bolting ANSWERS A - coenobium of Volvox, a-daughter colony; B - Laminaria, b-frond; C - Funaria- gametophyte and sporophyte, c-capsule D - Sphagnum gametophyte, d-archegonial branch E - Selaginelta sporophyte, e-rhizophore. A-4. frontal 5. mandible, B-7. clavicle, C-2 sternum, D-9. carpals, E- 8. ilium, ischium and pubis, F-10. femur 11. patella, G-12. tarsal 13. metatarsal (Note --1. vertebral column. 3. two articulation surfaces of ribs 6. scapula 14. calcaneus, they all are present on dorsal side) A - Cladosporium, C - Aspergilus, (a) (c) (e) 5. (a) (c.) (e) 78 B - Penicillium, D - Altemaria A - drupe, X-endocarp, (b) C - syconus, hypanthodium, (d) E - berry, Flavr-Savr hyponasty, epinasty, (b) thigmonastic, (d) sucrose, malic acid, (f) BIOLOGY TODAY APRIL 09 B - Caryopsis, 3n, D - sorosis, bulbils, epinasty, hyponasty, seismonasty, peptones. 6. 1 - (a, b, c); 2 - (d, e); 3 - (f, g); 4 - (h, i); 5 — (k, I) a, b, c, e, f are true. 8. (a) Extensin and expansin. (b) Matrix-hemicellulose & pectin, macrofibril-cellulose depositions. (c) Macrofibril is made up of 250 microfibrils. Each microfibril is made up of 20 micelles. Each micelle is made up 100 cellulose chains. Each cellulose chain consists of 30006000 glucose units joined by |3, 1-4 glycosidic bonds. (d) In primary wall, the fibrils are short, wavy and loosely scattered. (e) A-S3, B-S2, C-S1,D-primary wall, (here S stand for secondary wall). (a) - 30; (b) - 7; (c) - 127; (d) - 20 pg; (e) - 125 1 0 . 1 - (a, j); 6 - (a, k); 2-(d); 7-(c); 3-(f); 4-(i); 5-(g,h); 8-(e); 9-(m); 1 0 - ( I , m) (a) prairies (b) steppes (d) veldt (d) puszta (c) pampas 12 1 - d; 2 - c; 3 - e; 4 - a; 5 - b (a) Sanguivorous animal feed on blood. (b) Benthos-those animal found living in the sea bottom but now used to describe organism of aquatic ecosystem that live associated with a substratum. (c) Anadramous fishes - these marine fishes migrate from the sea into the estuaries for spawning, e.g., salmon. (d) Cannibals eat their fellows, such as cockroach. (e) Metameric segmentation-segmentation where external division corresponds to internal division. The body is often divided both externally and internally into a number of segments or metameres. (a) angina pectoris (c) coronary angioplasty (e) hematocrit value (b) anastomoses (d) endocardium 15. 1 - (e, d), 2 - (e, j), 3 - (a, h), 4 - (b, f, g), 5 - (c, i) 1 - D, 2 - D, 3 - D, 4 - C, 5 - D, 6 - A, 7 - A, 8 - C, 9 - B, 10 - C,11 - C, 12 - D, 13 - D, 1 4 - B, 15 - B. 1 - (b), 2 - (e), 3 - (a), 4 - (d), 5 - (c) (i) True (ii) False (iii) True (iv) False (v) False (help of hyaline cartilage), (vi) False (ventrally) (vii) False (Thoracic vertebrae, ribs and sternum together form the rib cage.) (viii) False (appendicular skeleton). (i) Z-Polygonum type of embryo sac, (ii) A - Antipodal cells, B - Polar nuclei, C - Central cells, D - Egg, E - Synergids, F - Filliform apparatus (iii) Triple fusion - B and P, Syngamy D and P (iv) X-Chalazal end, Y-Micropylar end (v) Calcium and boron 1 -(b, d, f, m); 2-(a, e, j, k); 3-(c, n, o); 4-(g ,l); 5-(h, i) CBSE-PMT MAINS 2009 Veri-Similar Practice Paper-2 - Prof. Siddharth Identify the following structures (A, B, C, D, E) and their parts labelled as a, b, c, d and e. Sanghvi 2. Match the column A with Column B. S.N. Column A (Phylum) S.N. Column B (Examples/ character) 1. Porifera (a) Coral" 2. Cnidaria (b) Hook worm (Ancylostoma) 3. Platyhelminthes (c) Neptune's cup (Poterion) 4. Nemathelminthes (d) Liver flukes (Fasciola) 5. Annelida (e) Dead man's finger (•Chalina) (f) Sea mouse (Aphrodite) (g) Planaria (h) Pin worm (Enterobius) (i) Sycon (j) Polyp & medusa (k) Aurelia 3, Fill in the blanks (a) is a protein that prevent blood clotting. The gene encoding this protein was chemically synthesized. That gene was transferred into where this protein accumulates in the seed. (b) In 1983, an American company named prepared two DNA sequences corresponding to A and B chains of human insulin and introduced them in plasmids of to produce insulin chains. Chains A and B were produced separately, extracted and combined by creating disulfide bonds to form human insulin. (c) A west African plant named produces a protein called which is approximately 2000 times as sweet as sugaj, (d) The transgenic GMO tomato called has a much longer and increased shelf life because of delayed ripening.This is achieved by reducing the amount of pectin of cell wall degrading enzyme for fruit softening. responsible (e) Golden rice is rich in BIOLOGY TODAY | APRIL 09 75 4, Match column A with column Column A Column B 1. Australopithecus africanus (a) Sinanthropus 2. Homo habilis (b) Pithecanthropus 3. Homo erectus (0 Brain capacity was about 1300-1600 c.c. 4. Homo sapiens neanderthalensis 5. Homo sapiens fossilis (d) Cro-Magnon man (e) Existed until about 1.5 million years ago (f) Peking man (g) Brain capacity was about 700 c.c. (h) It's a direct ancestor of the living man Handy man (i) (j) He lived in Africa about 2 million years ago (k) Appeared about 1.7 million year ago (I) (m) He believed in immorality of soul "Lucy" (n) African Ape man (o) Brain capacity was about 1650 c.c. (P) Most numerous from about 1,00,000 years ago. Gave rise to Homo habilis (q) (r) Tuang baby (s) Brain capacity was about 500 c.c. (t) First tool maker Write the name of pollination mechanism / pollination type / pollinator relationship/ name of pollinator (whatever is applicable ) for the given plants. Plants name Ficus species 2. Aristolochia 3. Salvia : 4. Yucca & Tageticula | 5. | Anthocephalus Pollination mechanism/ pollination type/ pollinator relationship (a) Name of pollinator -h> (b) Pollination mechanism j (c) : Pollination mechanism (d) Pollinator relationship (e) Pollination type —> BIOLOGY TODAY | APRIL 09 247 6. Select name of joint from column I and match with examples from column II. Column II Column 1 1. Ball and socket joint (a) Atlas and axis 2. Hinge joint (b) Between the carpals 3. Pivot joint (c) Humerus and pectoral girdle 4. Gliding joint (d) Between carpal and metacarpal of thumb 5. Saddle joint (e) Knee joint Column alpha represents the placentation in different plants. Match the items of column beta, gamma, lambda (mention the number) with column alpha (Diagrams). Column alpha-Diagrams (b) (d) Column beta-Names I . Axile .2. Free central 4. Marginal 5. Parietal 3. Basal Column gamma-Features 6. Placenta forms a ridge along the ventral suture of the ovary and the ovules are borne on this ridge forming two rows. 7. When the ovules are borne on central axis and septa are absent 8. The placenta develops at the base of ovary and a single ovule is attached to it 9. When the placenta is axial and the ovules are attached to it in a multilocular ovary. 10. The ovules develop on the inner wall of the ovary or on peripheral part. Ovary is one-chambered but it becomes two chambered due to the formation of the false septum. Column lambda I I . china rose 14. Primrose 17. tomato 20. marigold. 12. Argemone. 15. mustard 18. lemon 13. 16. 19. Dianthus pea sunflower 8. Select true and false statements. (a) Cerebrospinal fluid (CSF) is produced by choroid plexus. (b) Cerebrospinal fluid (CSF) flows from the brain ventricles to the subarachnoid space. (c) 10. For the given flowers a,b,c,d, select the correct applicable information from boxes and make a complete answer(write the no.or alphabet of box in your answer) Cerebrospinal fluid (CSF) acts as a fluid shock absorber in the subarachnoid space. (d) The volume of CSF contained in the nervous system is approximately four (4) times the volume of CSF that is produced per day. (e) In order to flow from the third ventricle to the fourth ventricle,CSF flows through the cerebral aqueduct. (f) (a) A "ridge" on the surface of the brain is called a gyrus. (g) Motor areas are concentrated in the anterior part of the cerebrum. (h) During complex voluntary movements, the medulla provides corrective feedback for maximum coordination. (i) In most individuals, the speech areas are located in the right cerebral hemisphere. (j) Vagus nerve provides some innervation to the heart, lungs and upper abdominal organ. Fill in the blanks (Combo) (Select examples from given other blanks fill with your own choice). Rhynia, Psilotum, Selaginella. Osmunda, Marsilea, Pteris, Dryopteris The stele of stem is connected to that of stele of leaf by a vascular connection called .(!> It produces a break in vascular cylinder called iJ). The simplest and most primitive type of stele is ® which is a solid stele having smooth core of xylem with no medulla (pith) e.g From this stele, siphonostele (stele with pith hence also called medullated protostele) originated. It may be ectophloic siphonostele (phloem outer of xylem) e.g., (?) Amphiphloic siphonostele, (phloem on both outer and inner of xylem) e.g., ® , solenostele (stele with non over lapped leaf gaps) and dictyosteles originated. In dicyostele the stele is dissected into many (?) due to overlapped leaf gaps. Each meristele is just like protostele e.g., rhizome of ferns ® Sometimes, there are two or more rings of meristeles in a dictyostele. This condition is called ® stele. In gymnosperms and dicot angiosperms, stele is called .0.9? that has many vascular bundles arranged in a ring. In monocot angiosperms, vascular bundles are scattered in ground tissue. This type of stele is called (1D (0 Examples Position of Type of ovary flowers P. Half inferior 1. plum X. Epigynous 2. rose Y. Perigynous Q. Inferior 3. peach Z. Hypogynous R. Superior 4. guava 5. cucumber 6. the ray florets of sunflower 7. mustard 8. china rose 9. brinjal Give the answers of following questions on the basis of given diagram and your knowledge. (a) What is leptome, and the term leptome was given by ? (b) Identify the part 1-5. (c) Write the name of material deposited in part 6, also mention the glycosidic linkage ? (d) What is slime plugs? It is deposited at which part ? (e) In place of companion cell gymnosperm have BIOLOGY TODAY 12. Match column I with column II Column I Vitamin A (P) Heips in the absorption and utilization of iron by converting the inorganic ferric iron to the ferrous form 2. Vitamin Bg (Q) Best source-cod liver oil 3. Vitamin C (R) 4. Vitamin D • 5. Vitamin E Y-type of X-type of Column II Immune response Immune response Antigen (1st exposure) Engulfed by * j' Free antigens directly activate ^ Antigens displayed by infected cells activate Stimulates First fat soluble vitamin to be discovered Stimulates Stimulates Best source-cod liver oil and synthesis of this vitamin needs ultraviolet light JL Anti infection • (U) Tocopherols (V) It is essential for growth and formation of red blood corpuscles Daily requirement - 50 mg. "W It helps in DNA synthesis (Y) Best source-vegetable oils (Z) It maintains the normal functioning of parathormone 13. Give the answers of following questions: (i) Note the location of the parathyroid glands and describe the hormonal control of calcium homeostasis. (ii) Distinguish between alpha and beta cells in the pancreas and explain how their antagonistic hormones (insulin and glucagon) regulate carbohydrate metabolism. (iii) Distinguish between type I diabetes mellitus and type II diabetes mellitus. (iv) List the hormones of the adrenal medulla, describe their functions. (v) List the hormones of the adrenal cortex, describe their functions. (vi) List the hormones hormone of steroid categories produced by the gonads. 14. The flow chart shows some of the stages involved in the immunological response to an antigen. (a) What is an antigen? (b) Name (i) Type X & (ii) Type Y immune responses. (c) Identify A-F (d) Influenza and measles are diseases caused by viruses. The viruses have antigens on their surface. Use your knowledge of antigens and antibodies to suggest why a person may have influenza several times, but usually has measles only once. BIOLOGY TODAY | APRIL 09 249 ^Secrete .Antibodies, 1 y t -/ Defend against extracellular pathogens by binding to antigens and making them easier targets for phagocytes and complement Defend against intracellular pathogens and cancer by binding to and lysing the infected cells or cancer cells 15. Given information is about sexual reproduction in Rhizopus. Fill the blank places. Rhizopus stolonifer'is <1> with two mating types, +ve and -ve. When the mycelia of both the mating types are present in the same medium, they produce <2) ..... by the reaction, which stimulate the mycelia to form special types of subaerial hyphae called <4> which in the region of contact produces a club shaped outgrowth called due to the reaction. Both the opposite strained structure 5 remain in contact at their terminal ends and each of them is multinucleate and aseptate, hence is also (7) called a The terminal swollen part is (8) distinguished as a by the laying down of a septum at its base, due to which suspensor is formed. The protoplast of it behaves as a The contact wall between the two dissolved due to which the cytoplasms of two fuse together. The opposite strained nuclei come pair together. The paired nuclei fuse together to form diploid nuclei (karyogamy) as a result of which a diploid multinucleate structure called (10' is formed. This secretes a hard wall around itself to form a resting spore called (11> which is a dark brown or black .This method of sexual reproduction in Rhizopus is called (12> 15. Fill in the blanks. (i) Forest cover in india is which is less than % of land in India, % area recommended by the national forest policy for plains. involves growing agricultural crops between rows of planted trees. (iii ) involves felling and burning of forest followed by cultivation of crops for few years and abandonig cultivation to allow forest growth. (iv) Economically important fish can be grouped into two categories, namely fish found at the sea bottom, and fishes floating free in water column. (v) Gasoline mixed with % ethanol can be used as conventional gasoline engines. (ii) 17. Give the answers of following questions on the basis of given diagram. (i) Identify the given structure a & b. (ii) Rhizoids present on which surface of this bryophyte? (iii) Write the name of the structure required for vegetative reproduction in given diagram. (iv) How many no.of NCC are present in this bryophyte? (v) Write the name of structure responsible for spore dispersal. Given diagram represents fusion of respiratory and circulatory systems of human. Refer the diagram and give the answers of following questions. Inspired air \ ExPired air / X-Atmosphere (i) Write the name of structure a, b, c, d, e. (ii) Write the partial pressure of 0 2 and C0 2 at position X, Y & structure a, c, e. (iii) Write the structure involved in systemic circulation. (iv) Write the structure involved in pulmonary circulation. (v) The solubility of C0 2 is times higher than that of 02. 19. Fill in the blanks. (i) Erythrocytes, leucocytes and platelets are collectively called and they constitute nearly per cent of the blood. (ii) Erythrocytes or red blood cells (RBC) are the most abundant of all the cells in blood. A healthy adult man has, on an average millions to millions of RBCs mm-3 of blood. (iii) RBCs are formed in the in the adults. RBCs are in shape. (iv) A healthy individual has gms of haemoglobin in every 100 ml of blood. (v) RBCs have an average life span of days after which they are destroyed in the (graveyard of RBCs). (vi) Leucocytes are also known as white blood cells (WBC). They are nucleated and are relatively lesser in number which averages mm-3 of blood. (vii) We have two main categories of WBCs - granulocytes and agranulocytes are different types of granulocytes, while are the agranulocytes. (viii ) are the most abundant cells (60-65 per cent) of the total WBCs and are the least (0.5-1 per cent) among them. (ix) and (6-8 per cent) are phagocytic cells which destroy foreign organisms entering the body. (x) secrete histamine, serotonin, heparin, etc., and are involved in inflammatory reactions. (xi ) (2-3 per cent) resist infections and are also associated with allergic reactions. (xii ) J_c e (carrying deoxygenated blood) : (carrying oxygenated | blood) Y-Body tissues (20-25 per cent) are of two major types and forms. Both are responsible for immune responses of the body. (xiii) Platelets also called , are cell fragments produced from (xiv) Blood normally contains platelets mm-3. Platelets can release a variety of substances most of which are involved in the coagulation or clotting of blood. (xv)A special case of Rh incompatibility (mismatching) has been observed between the Rh-ve blood of a pregnant mother with Rh+ve blood of the foetus. This condition is called This can be avoided by administering to the mother immediately BIOLOGY TODAY | APRIL 09 83 Fill in the blanks (i) E. coli that has only base pair compare with human whose diploid content is base pair. (ii) E. coli completes the process of replication within minutes; that means the average rate of polymerisation has to be approximately bp per second. (iii) A is defined as the functional unit of inheritance, promoterandterminatorflankthe in a transcription unit. (iv) RNA polymerase is responsible for transcription of snRNAs (small nuclear RNAs) and the RNA polymerase :.... transcribes the heterogeneous nuclear RNA (hnRNA). (v) In capping an unusual nucleotide is added to the 5'-end of hnRNA. In tailing (200-300) are added at 3'-end in a template independent manner. ANSWERS (A) (B) (C) (D) (E) Villi, (a) Microvilli, Microtubule, (b) Protofilament, Polytene chromosome, (c) Puff or Balbiani rings Cell wall, (d) Macrofibrils Oxysome or F, - F0 particles, (e) Head 1. 4. (a) (b) (c) (d) (e) (c,e,i), 2. (a, j, k), 3. (d, g), (b,h), 5. (f) Hirudin, Brassica napus Eli Lilly, E.coli Pentadiplandra brazzeana, Brazzein Flavr Savr, polygalacturonase Vitamin A 1. (e, q, r, n, s, m); 2. (g,t, l,j); 4. (c, I, p); 5. (d, h, o) Plant name 1. Ficus species 2. 3. 4. Aristolochia Salvia Yucca & Tageticula 5 Anthocephalus 1. (c), 2. (e), (a)-4-6-(16), (c) - 5 - 1 0 - 0 2 , 1 5 ) , 4. (b), (b) - 1-9-(11,17, U (d) - 2 - 7 - 0 3 , 1 4 ) , B I O L O G Y TODAY | APRIL 09 251 9 (a) (e) (i) 1. True, True, False, leaf trace 4. 5. I. 9. II. Rhynia, Psilotum, Selaginella. Osmunda. 6. Marsilea meristeles 8. Pteris, Dryopteris. polycyclic stele, 10. eustele atactostele 5. (d) (b) (f) (j) 2. True, (c) True, (d) False, True, (g) True, (h) False, True. leaf gap. 3. haplostele (protostele) 10. (a) - Z-R-7,8,9, (b) & (c) - Y-P-1,2,3, (d) - X-Q-4,5,6. (b) (c) (d) (e) (a) Conducting part of pholem is known as leptome. (/.ephloem-phloem fibers). Term was given by Haberlandt. 1 = inclined simple sieve plate; 2 = phloem parenchyma cells, 3 = companion cell; 4 = sieve tube members 5 = Sieve tube plastid Callose-a carbohydrate and it's a beta 1-3 glucan. It's a deposition of P-protein over sieve areas and is called slime plugs. It is deposited at part 1 Albuminous cell/Strasburger cell : 1. (Q, R, T); 2. (V, X); 3. (P, W); 4. (S, Z); 5. (U, Y). 13. (i) Two pairs of endocrine glands situated behind, or embedded within the thyroid gland. Secrete PTH (parathyroid hormone) which raises blood levels of Ca ions, countering the action of calcitonin. Acts on bones to decompose and release Ca ions and on the kidneys to reabsorb Ca ions from the collecting tubules. Activates vitamin D, which acts as a hormone to stimulate Ca uptake from food. BHU 3, (k,a, b,f,k) Pollination mechanism/ pollination type/ pollinator relationship (a) Pollinator-Blastophagawasp (b) Trap mechanism (0 Lever mechanism (d) Obligate symbiotic relationship/Reciprocal symbiosis (e) Cheiropteriphily 3. (a), (e) - 3 - 8 - 0 9 , 2 0 ) GXPLORGR Screening & Mains A v a i l a b l e at l e a d i n g book-shops throughout India. vvtfcS-MTG B O O K S XSSi 503, Taj Apt., • | 0 | Price : 1 [%RS.250 J BOOlS Ring Road Near Safdarjung Hospita New D e l h i - 110 029 Tel.: (011)46686000. e-mail: info@mtg.in web : mtg.in (ii) Alpha cells secrete glucagons, which increases glucose levels in blood and beta cells produce insulin, which acts to decrease glucose levels in the blood. Insulin decreases blood glucose by slowing glycogen breakdown in the liver and inhibiting the conversion of amino acids and glycerol (from fats) into sugar. (iii) Type I diabetes - is an autoimmune disease, immune system attacks insulin-producing cells of pancreas, requires insulin shots. Type II diabetes is reduced responsiveness to insulin due to changes in insulin receptors, occurs >40 yrs age, can be managed by exercise and dietary control. (iv) Epinephrine and norepinephrine and other catecholamines control heart rate and stroke volume of heart, dilate bronchioles in lungs (v) Glucocorticoids, suppress certain components of immune system. Mineralcorticoids, major effects on salt and water balance. Sex hormones - not well understood, may account for sex drive in females. (vi) Androgens, estrogens, and progestins (a) The antigen molecule is a which stimulates an immune response/antibody production. / glycoprotein I non-self protein. (b) (i) X-Humoral or antibody mediated immune response (ii) Y - Cell-mediated immune response (c) A - Macrophage, B - Antigen presenting cell, C - Helper T - cell, D - Cytotoxic T - cell, E - Plasma cell, F - Memory B - cell (d) Measles — One antigen /unchanging; So one type of memory cell I So one type of antibody needed; Influenza —- Several antigens /changing; so several types of memory cell /so many types of antibodies needed 15.1. 2. 3. 4. 5. 6. 7. 8. 9. 10. Heterothallic Trisporic acids Telemorphic Zygophores progametangium. Thighmotropic coenoprogametangium. coenogametangium, coenogamete. coenozygote (a) Marchantia female thallus Marchantia male thallus -Ventral (iii) - Gemma cup/Gemmae - 4-6 (v) - Elaters a - alveolus, b - pulmonary vein, c - systemic arteries, pulmonary artery, e - systemic vein (ii) a - p 0 2 = c - p0 2 = e - p0 2 = X - p0 2 = Y - p0 2 = 104mmHg, pC0 2 = 40mmHg 95mmHg, pC0 2 = 40mmHg 40mmHg, pC0 2 = 45mmHg 159mmHg, pC0 2 = 0.3mmHg 40mmHg, pC0 2 = 45mmHg (iii) c and e (iv) d, and a, b (v) >20-25 times (i) Formed elements, 45 (ii) 5 to 5.5 millions (iii) red bone marrow, biconcave (iv) 12-16 (v) 120, spleen (vi) 6000-8000 (vii) Neutrophils, eosinophils and basophils///lymphocytes and monocytes (viii) Neutrophils, basophils (ix) Neutrophils and monocytes (x) Basophils (xi) Eosinophils (xii) Lymphocytes, 'B' and T forms. (xiii)Thrombocytes, megakaryocytes (xiv) 1,500,00-3,500,00 (xv) Erythroblastosis foetalis, anti-Rh antibodies 20. (i) 4.6 x10 6 , 6.6 - 6.9x 109, (ii) 38-40, 1000-2000. (iii) gene, structural gene (iv) III, II (v) (methyl guanosine triphosphate) or 7-methyl guanosine, adenylate residues or polyadenylate •• 11. coenozygospore/Zygospore. 12. conjugation or gamentangial copulation. (i) 19.4%, 33% (iii) Jhum cultivation (v) 10-20% (i) (b) (ii) (iv) (i) d- (ii) Taungya system (iv) Demersal, pelagic Prof. Siddharth Sanghvi Having experience of 11 years, he started teaching for medical entrance at the age of 17 years in 1997, that time he was himself a PMT aspirant. After cracking PMT he opted for teaching as a profession and now it has become a passion for him. He has worked with different institute of indore and kota in the span of 11 years as a faculty member of biology. Presently he is working with Rankers point as a HOD of Botany. His expert guidance has helped his student in securing TOP Ranks in different medical entrance. Cell - 09425107550, Web : www.wxyz.in BIOLOGY TODAY | APRIL 09 75 Prelims nwcm part (a) (b) (c) (d) Which one of the following is correct pairing of a body and the kind of muscle tissue that moves it? biceps of upper arm smooth muscle fibres abdominal wall smooth muscle iris involuntary smooth muscle heart wall involuntary unstriated muscle 2. The epithelial tissue present on the inner surface of bronchioles and Fallopian tubes is (a) glandular (b) ciliated (c) squamous (d) cuboidal 10. What will happen if the stretch receptors of the urinary bladder wall are totally removed? (a) (b) (c) (d) micturition will continue urine will continue to collect normally in the bladder there will be no micturition urine will not collect in the bladder 11- If a live earthworm is pricked with a needle on its outer surface without damaging its gut, the fluid that comes out is (a) coelomic fluid (b) haemolymph (c) slimy mucus (d) excretory fluid 3. One of the synthetic auxin is (a) IAA (b) GA (c) IBA 4. The floral formula ® $ K(5) C(5) A 5 £(2) is that of Alzheimer's disease in humans is associated with the deficiency of (a) glutamic acid (b) acetylcholine (c) gamma aminobutyric acid (GABA) (d) dopamine Manganese is required in (a) plant cell wall formation photolysis of water during photosynthesis (d) nucleic acid synthesis (c) chlorophyll synthesis (a) soyabean (b) sunhemp (c) tobacco (d) tulip Which one of the following groups of animals is bilaterally symmetrical and triploblastic? (a) aschelminthes (round worms) (b) ctenophores (c) sponges (d) coelenterates (cnidarians) Which one is the wrong pairing for the disease and its causal organism? (a) black rust of wheat-Puccinia graminis (b) loose smut of wheat-Ustilago nuda (c) rootknot of vegetables-Me/o/cfogyne sp (d) late blight of potato-Alternaria solani 7. T.O. Diener discovered a (a) free infectious DNA (c) bacteriophage (b) infectious protein (d) free infectious RNA 8. A fruit developed from hypanthodium inflorescence is called (a) sorosis (b) syconus (c) caryopsis (d) hesperidium The cell junctions called tight, adhering and gap junctions •are found in (a) connective tissue (b) epithelial tissue (c) neural tissue (d) muscular tissue (d) NAA 14- Compared to blood our lymph has (a) plasma without proteins (b) more WBCs and no RBCs (c) more RBCs and less WBCs (d) no plasma When breast feeding is replaced by less nutritive food low in proteins and calories; the infants below the age of one year are likely to suffer from (a) rickets (b) kwashiorkor (c) pellagra (d) marasmus 15 16. A young infant may be feeding entirely on mother's milk which is white in colour but the stools which the infant passes out is quite yellowish. What is this yellow colour due to? (a) (b) (c) (d) bile pigments passed through bile juice undigested milk protein casein pancreatic juice poured into duodenum intestinal juice Oxygenic photosynthesis occurs in (a) Oscillatoria (b) Rhodospirillum (c) Chlorobium (d) Chromatium There is no DNA in (a) mature RBCs (c) hair root (b) a mature spermatozoan (d) an enucleated ovum BIOLOGY TODAY ARPIL 253 19. Given below is a schematic breakup of the phases/stages of cell cycle Which one of the following is the correct indication of the stage/phase in the cell cycle? (a) C - karyokinesis (b) D - synthetic phase (c) A - cytokinesis (d) B - metaphase (a) mackerals and rohu (c) guppies and hag fishes 20. Which one of the following statements is true regarding digestion and absorption of food in humans? (a) fructose and amino acids are absorbed through intestinal mucosa with the help of carrier ions like Na + (b) chylomicrons are small lipoprotein particles that are transported from intestine into blood capillaries (c) about 60% of starch is hydrolysed by salivary amylase in our mouth (d) oxyntic cells in our stomach secrete the proenzyme pepsinogen 31. An example of axile placentation is (a) Dianthus (b) lemon (c) marigold (d) Argemone 21. (a) (b) (c) (d) Synapsis occurs between mRNA and ribosomes spindle fibres and centromere two homologous chromosomes a male and a female gamete 22. Which one ofthe following plants is monoecious? (a) Pinus (b) Cycas (c) papaya (d) Marchantia 23. Cyclic photophosphorylation results in the formation of (a) ATP and NADPH (b) ATP, NADPH and 0 2 (c) ATP (d) NADPH Anatomically fairly old dicotyledonous root is distinguished from the dicotyledonous stem by (a) absence of secondary phloem (b) presence of cortex (c) position of protoxylem (d) absence of secondary xylem 25. (a) (b) (c) (d) Plasmodesmata are locomotary structures membranes connecting the nucleus with plasmalemma connections between adjacent cells lignified cemented layers between cells 26. Phylogenetic system of classification is based on (a) morphological features (b) chemical constituents (c) floral characters (d) evolutionary relationships 27. Which part of human brain is concerned with the regulation of body temperature? (a) cerebellum (b) cerebrum (c) hypothalamus (d) medulla oblongata 28. Which one of the following pairs of animals comprises 'jawless fishes'? BIOLOGY TODAY | MAY '09 i (b) lampreys and hag fishes (d) lampreys and eels 29. Aerobic respiratory pathway is appropriately termed (a) parabolic (b) amphibolic (c) anabolic (d) catabolic 30. (a) (c) (d) Cytoskeleton is made up of callose deposits (b) cellulosic microfibrils proteinaceous filaments calcium carbonate granules 32. Which one ofthe following has haplontic life cycle? (a) Polytrichum (b) Ustilago (c) wheat (d) Funaria 33. Which one of the following is considered important in the development of seed habit? (a) heterospory (b) haplontic life cycle (c) free-living gametophyte (d) dependent sporophyte 34. The annular and spirally thickened conducting elements generally develop in the protoxylem when the root or stem is (a) elongating (b) widening (c) differentiating (d) maturing 35. (a) (b) (d) Stroma' in the chloroplasts of higher plant contains light-dependent reaction enzymes ribosomes (c) chlorophyll light-independent reaction enzymes 36. A health disorder that results from the deficiency of thyroxine in adults and characterised by (i) a low metabolic rate, (ii) increase in body weight and (iii) tendency to retain water in tissues is (a) simple goitre (b) myxoedema (c) cretinism (d) hypothyroidism 37. Mannitol is the stored food in (a) Porphyra (b) Fucus (c) Gracillaria (d) Chara 38. Which one of the following is a vascular cryptogam? (a) Ginkgo (b) Marchantia (c) Cedrus (d) Equisetum 39. In a standard ECG which one of the following alphabets is the correct representation of the respective activity of the human heart? (a) S - start of systole (b) T - end of diastole (c) P - depolarisation of the atria (d) R - repolarisation of ventricles 40. Uric acid is the chief nitrogenous component of the excretory products of (a) earthworm (b) cockroach (c) frog (d) man 41. Guard cells help in (a) transpiration (b) guttation (c) fighting against infection (d) protection against grazing CLASS XII 54, Study the pedigree chart given below. What does it show? •—f—o 6 hi•T6 66 42. Cotyledons and testa respectively are edible parts in (a) walnut and tamarind (b) french bean and coconut (c) cashew nut and litchi (d) groundnut and pomegranate 43. Palisade parenchyma is absent in leaves of: (a) mustard (b) soyabean (c) gram (d) sorghum 44. In barley stem vascular bundles are (a) closed and scattered (b) open and in a ring (c) closed and radial (d) open and scattered 45. Which one of the following is the correct matching of three items and their grouping-category? Items Group (a) ilium, ischium, pubis coxal.bones of pelvic girdle (b) actin, myosin, rhodopsin muscle proteins (c) cytosine, uracil, thiamine pyrimidines (d) malleus, incus, cochlea ear ossicles 46. Which one of the following pairs of food components in humans reaches the stomach totally undigested ? (a) starch and fat (b) fat and cellulose (c) starch and cellulose (d) protein and starch 47. Middle lamella is composed mainly of (a) muramic acid (b) calcium pectate (c) phosphoglycerides (d) hemicellulose 48. Elbow joint is an example of (a) hinge joint (b) gliding joint (c) ball and socket joint (d) pivot joint 49. Which of the following is a symbiotic nitrogen fixer? (a) Azotobacter (b) Frankia (c) Azolla (d) Glomus 50. Which one of the following acids is a derivative of carotenoids? (a) indole-3-acetic acid (b) gibberellic acid (c) abscisic acid (d) indole butyric acid 51. An example of a seed with endosperm, perisperm, and caruncle is (a) coffee (b) lily (c) castor (d) cotton 52. Which one of the following correctly describes the location of some body parts in the earthworm Pheretimal (a) four pairs of spermathecae in 4-7 segments (b) one pair of ovaries attached at intersegmental septum of 14th and 15th segments (c) two pairs of testes in 10th and 11th segments (d) two pairs of accessory glands in 16-18 segments 53. The kind of tissue that forms the supportive structure in our pinna (external ears) is also found in (a) nails (b) ear ossicles (c) tip of the nose (d) vertebrae (a) inheritance of a condition like phenylketonuria as an autosomal recessive trait' (b) the pedigree chart is wrong as this is not possible (c) inheritance of a recessive sex-linked disease like haemophilia (d) inheritance of a sex-linked inborn error of metabolism like phenylketonuria 55. (a) (b) (c) (d) Polyethylene glycol method is used for biodiesel production seedless fruit production energy production from sewage gene transfer without a vector. 56. Which one of the following is commonly used in transfer of foreign DNA into crop plants? (a) Meloldogyne incognita (b) Agrobacterium tumefaciens (c) Peniciliium expansum (d) Trichoderma harzianum 57. Which one of the following is the correct matching of the events occurring during menstrual cycle? (a) proliferative phase : rapid regeneration of myometrium and maturation of Graafian follicle (b) development of corpus luteum : (c) : menstruation (d) ovulation 58. the (a) (c) : secretory phase and increased secretion of progesterone breakdown of myometrium and ovum not fertilised LH and FSH attain peak level and sharp fall in the secretion of progesterone Global agreement in specific control strategies to reduce release of ozone depleting substances, was adopted by Montreal Protocol (b) Kyoto Protocol Vienna Convention (d) Rio de Janeiro Conference What is true about Bt toxin? (a) Bt protein exists as active toxin in the Bacillus. (b) the activated toxin enters the ovaries of the pest to sterilise it and thus prevent its multiplication. • BIOLOGY TODAYMARCH'09 (c) the concerned Bacillus has antitoxins. (d) the inactive protoxin gets converted into active form in the insect gut. 60. (a) (b) (c) (d) Peripatus is a connecting link between mollusca and echinodermata annelida and arthropoda coelenterata and porifera ctenophora and platyhelminthes 61. (a) (b) (c) (d) Seminal plasma in humans is rich in fructose and calcium but has no enzymes glucose and certain enzymes but has no calcium fructose and certain enzymes but poor in calcium fructose, calcium and certain enzymes 62. The most popularly known blood grouping is the ABO grouping. It is named ABO and not ABC, because "0" in it refers to having (a) overdominance of this type on the genes for A and B types (b) one antibody only - either anti - A or anti - B on the RBCs (c) no antigens A and B on RBCs (d) other antigens besides A and B on RBCs 63. A person likely to develop tetanus is immunised by administering (a) preformed antibodies (b) wide spectrum antibiotics (c) weakened germs (d) dead germs 64. Biochemical oxygen demand (BOD) in a river water (a) has no relationship with concentration of oxygen in the water (b) gives a measure of Salmonella in the water (c) increases when sewage gets mixed with river water (d) remains unchanged when algal bloom occurs 65. may (a) (b) The genetic defect-adenosine deaminase (ADA) deficiency be cured permanently by administering adenosine deaminase activators introducing bone marrow cells producing ADA into cells at early embryonic stages (c) enzyme replacement therapy (d) periodic infusion of genetically engineered lymphocytes having functional ADA cDNA 66. Sickle-cell anaemia is (a) caused by substitution of valine by glutamic acid in the beta globin chain of haemoglobin (b) caused by a change in a single base pair of DNA (c) characterized by elongated sickle like RBCs with a nucleus (d) an autosomal linked dominant trait 16 BIOLOGY TODAY |MARCH'09 67. Which of the following plant species you would select for the production of bioethanol? (a) Zeamays (b) Pongamia (c) Jatropha (d) Brassica 68. Which one ofthe following has maximum genetic diversity in India? (a) mango (b) wheat (c) tea (d) teak 69. Tiger is not a resident in which one of the following national park? (a) Sunderbans (b) Gir (c) Jim Corbett (d) Ranthambhor 70. Given below is a diagrammatic sketch of a portion of human male reproductive system. Select the correct set of the names (a) A-vas deferens, B-seminal vesicle, C-prostate, D-bulbourethral gland (b) A-vas deferens, B-seminal vesicle, C-bulbourethral gland, D-prostate (c) A-ureter, B-seminal vesicle, C-prostate, D-bulbourethral gland (d) A-ureter, B-prostate, C-seminal vesicle, D-bulbourethral gland 71. (a) (c) (d) What is not true for genetic code? it is nearly universal (b) it is degenerate it is unambiguous. a codon in mRNA is read in a non-contiguous fashion. 72. The letter T in T-lymphocyte refers to (a) thalamus (b) tonsil (c) thymus (d) thyroid 73. (a) (b) (c) (d) Foetal ejection reflex in human female is induced by release of oxytocin from pituitary fully developed foetus and placenta differentiation of mammary glands pressure exerted by amniotic fluid 74. Removal of introns and joining the exons in a defined order in a transcription unit is called (a) tailing (b) transformation (c) capping (d) splicing 7 5. Semiconservative replication of DNA was first demonstrated in (a) Escherichia coli (b) Streptococcus pneumoniae (c) Salmonella typhimurium (d) Drosophila melanogaster 76. Which of the following is a pair of viral diseases? (a) common cold, AIDS (b) dysentery, common cold (c) typhoid, tuberculosis (d) ringworm, AIDS 77. A country with a high rate of population growth took measures to reduce it. The figure below shows age-sex pyramids of populations A and B twenty years apart. Select the correct interpretation about them Age a 70+ Males I W Females 60-69 50-59 ra 4049 [Z Z B H V c 30-39 HHtt — 1 8 1 ® 20-29 wa^m C U ISHPISl \ 1 i 1 I i i i i i i i 15 12 9 6 3 0 3 6 9 12 15 'A' L Age • i 70+ Females 60-69 Males • H • • 50-59 40-49 <£ot5 •B' C — • M l 30-39 c • • H i 20-29 Hydrilla —> Pistia —» Scirpus —• Lantana Oak (b) Pistia —• Volvox —> Scirpus —> Hydrilla —> Oak Lantana (c) Oak —• Lantana —> Volvox —* Hydrilla —> Pistia Scirpus (d) Oak —> Lantana —> Scirpus —> Pistia —* Hydrilla Volvox. —• —• —> —• 80. Which one of the following pairs is wrongly matched? (a) alcohol - nitrogenase (b) fruit juice - pectinase (c) textile - amylase (d) detergents - lipase 81. (a) (b) (c) Which of the following is not used as a biopesticide? Trichoderma harzianum nuclear polyhedrosis virus (NPV) Xanthomonas campestris (d) Bacillus thuringiensis 82. (a) (b) (c) (d) Montreal Protocol aims at biodiversity conservation control of water pollution control of C0 2 emission reduction of ozone depleting substances 83. DDT residues are rapidly passed through food chain causing biomagnification because DDT is (a) moderately toxic (b) non-toxic to aquatic animals (c) water soluble (d) lipo soluble 84. Vegetative propagation in mint occurs by (a) offset (b) rhizome (c) sucker (d) runner 85. Select the incorrect statement from the following. (a) galactosemia is an inborn error of metabolism (b) small population size results in random genetic drift in a population (c) baldness is a sex-limited trait (d) linkage is an exception to the principle of independent assortment in heredity 86. (a) (b) (c) (d) Which one of the following statements is correct? benign tumours show the property of metastasis heroin accelerates body functions malignant tumours may exhibit metastasis patients who have undergone surgery are given cannabinoids to relieve pain. 87. The correct sequence of spermatogenetic stages leading to the formation of sperms in a mature human testis is (a) spermatogonia - spermatocyte - spermatid - sperms (b) spermatid - spermatocyte - spermatogonia - sperms J| BIOLOGY TODAY MAY '257 (C) spermatogonia - spermatid - spermatocyte - sperms (d) spermatocyte - spermatogonia - spermatid - sperms (c) fertilization (d) formation of zygote 88. Use of anti-histamines and steroids give a quick relief from (b) cough (a) nausea (d) allergy (c) headache 96. Whose experiments cracked the DNA and discovered unequivocally that a genetic code is a "triplet"? (a) Hershey and Chase (b) Morgan and Sturtevant (c) Beadle and Tatum (d) Nirenberg and Mathaei 89. Chipko movement was launched for the protection of (b) livestock (a) forests wetlands (d) grasslands (c) 90. Which one of the following .is the most likely root cause why menstruation is not taking place in regularly cycling human female? (a) maintenance of the hypertrophical endometrial lining (b) maintenance of high concentration of sex-hormones in the blood stream (c) retention of well-developed corpus luteum (d) fertilisation of the ovum 91 Globulins contained in human blood plasma are primarily involved in (a) osmotic balance of body fluids (b) oxygen transport in the blood (c) clotting of blood (d) defence mechanisms of body 92. Somaclones are obtained by (b) irradiation (a) plant breeding genetic engineering (d) tissue culture. (0 93. In the case of peppered moth {Bistort betularia) the blackcoloured form became dominant over the light-coloured form in England during industrial revolution. This is an example of (a) appearance of the darker coloured individuals due to very poor sunlight (b) protective mimicry (c) inheritance of darker colour character acquired due to the darker environment (d) natural selection whereby the darker forms were selected 94. Transgenic plants are the ones (a) generated by introducing foreign DNA into a cell and regenerating a plant from that cell produced after piotoplast fusion in artificial medium (c) grown in artificial medium after hybridization in the field (d) produced by a somatic embryo in artificial medium. 95. egg (a) (b) A change in the amount of yolk and its distribution in the will affect pattern of cleavage number of blastomeres produced 16 BIOLOGY TODAY |MARCH'09 97. Which one of the following types of organisms occupy more than one trophic level in a pond ecosystem? (a) fish (b) zooplankton (c) frog (d) phytoplankton 98. The bacterium Bacillus thuringiensis is widely used in contemporary biology as (a) (b) (c) (d) insecticide agent for production of dairy products source of industrial enzyme indicator of water pollution 99. Reduction in vascular tissue, mechanical tissue and cuticle is characteristic of (a) mesophytes (b) epiphytes (c) hydrophytes (d) xerophytes 100. Point mutation involves (a) change in single base pair(b) duplication (c) deletion (d) insertion ANSWER KEY 1. (c) 6. (d) 11. (a) 16. (a) 21. ( 0 26. (d) 31. (0 36. (b) 41. (a) 46. '(b) 51. (c) 56. (b) 61. (d) 66. (b) 71. (d) 76. (a) 81. (c) 86. (c) 91. (d) 96. (d) 2. 7. 12. 17. 22. 27. 32. 37. 42. 47. (b) (d) (d) (a) (a) (c) (d) (b) (d) (b) 52. 57. 62. 67. 72. 77. 82. 87. 92. 97. (c) (b) (c) (a) (c) (d) (d) (a) (d) (a) 3. 8. 13. 18. 23. 28. 33. 38. 43. 48. 53. 58. 63. 68. 73. 78. 83. 88. 93. 98. (b) (b) (b) (a) (0 (b) (a) (d) (d) (a) (c) (a) (a) (a) (b) (a) (d) (d) (d) (a) 4. 9. 14. 19. 24. 29. 34. 39. 44. 49. 54. 59. 64. 69. 74. 79. 84. 89. >94. 99. (c) (b) (b) (b) (c) (b) (0 (0 (a) (b) (a) (d) (c) (b) (d) (a) (c) (a) (a) (c) 5. 10. 15. 20. 25. 30. 35. 40. 45. 50. 55. 60. 65. 70. 75. 80. 85. 90. 95. 100. (a) (a) (d) (a) (0 (0 (d) (b) (a) (0 (d) (b) (b) (a) (a). (a) (c) (b) (a) (a) • • Contd. on pg. no. 89 CBSE-PMT MAINS 2009 Veri-Similar Practice Paper-1 -Prof. Siddharth Sanghvi 1. Identify the following organisms (A, B, C, D, E) and phylum from which they belongs (B) (e) Rossette habit in liverworts/R/'cc/'a is due to repeated dichotomous branching. (f) Retort cells are larger empty cells of cortex of stem near the leaf bases in Sphagnum (peat or bog moss). These are flask shaped. (g) The sequence of cells in archegonium from upper to lower side is lid cells - venter canal cells - neck canal cell - egg cell. (h) Thallus of Anthoceros shows symbiotic association with a nitrogen fixing blue green alga-A/osfoc which lives in schizogenous mucilage ducts and mucilage cavities of thallus as endophyte. (i) Bog moss (Sphagnum) is a false mass. (j) In Cycas microspore is shed at 3-cell stage. 4. Give the answers of following questions (D) (E) 2, Write the word or phrase that best completes each statement or answers the question (a) Long, thin, tapered cells with lignified cell walls that function in support and permit water flow through pits (b) Living cells that lack nuclei and ribosomes; they transport sucrose and other organic nutrients (c) The least specialized plant cells, which serve general metabolic, synthetic, and storage functions (d) Cells with unevenly thickened primary walls that support young parts of the plant (e) Mature cells without protoplasts but with thick, lignified . secondary walls that may form fibers 3. Select true and false statements. Rectify false statements. (a) Gametophyte of Funaria is monoecious and autoecious. (b) Eastern Himalayas are considered to be gold mines of liverworts. (c) In algae asexual reproduction is by the production of different types of spores, the most common being the zoospores. (d) Isomorphic alternation of generation present in Selaginella. 16 BIOLOGY TODAY |MARCH'09 (a) The cavity of the G known as H along with I forms the birth canal. Identify structure G, H and I. (b) Write the name of supportive structures which are extended from B to F and gives support to structure F (c) The edges of the structure M possess finger-like projections J, which help in collection of the ovum after ovulation. Identify structure M and J ? (d) Write the nature of C, D, E layers (e) There are X and Y zone, two divisions of C, X is closest to A and Y is adjacent to D. Write the name of X and Y zone? 5. Fill in the blanks A soil bacterium produces a crystal protein. The crystal protein is toxic to larvae of certain insects. The gene encoding crystal protein is (?) gene.There are a number of them, for example, the proteins encoded by the genes .(.3a) and .(?)?) control the cotton bollworms, and gene controls corn borer. This toxin protein exist as inactive protoxins but once an insect ingest the inactive toxin, it is converted into an active form of toxin due to the ,'.4! pH of the gut which solubiiise the crystals.The activated toxin binds to the surface of cell of mid gut and create pores that cause cell swelling and lysis and eventually cause death of the insect. 6. Match the column A with column B Column A Column B 1. dodo a. extinctions from Russia 2. quagga b. extinctions from Australia 3. thylacine c. 4. Steller's Sea cow d. extinctions from Africa 5. Bali,Javan,Caspian e. extinctions from Mauritius extinct subspecies of tiger 7. Give the answers of following questions (a) Write the name of structure/center-X which is primarily responsible for this regulation of respiration (b) Write the name of another centre present in the pons region of the brain which can moderate the functions of the x center? (c) Write the name of center/area which is highly sensitive to C0 2 and hydrogen ions. (d) Where the receptors to sense changes in C0 2 and H + concentration are presents? (e) What is Hering-Breuer reflex? 8. This diagram illustrates the concept of wilting caused as overall water deficit form in the plant. Refer to this for the following questions (a) The first mode of action of antibiotics in which antibiotics destroys the microbial cells while in the second method antibiotics inhibits the growth of bacteria. (b) The science of analysing different proteins and "locating them in cells and identifying their respective genes, which encode them in the ceils is known as (c) Branch of science deals with the creation and maintenance of databases of biological information such as the nucleic acid, gene sequences and protein sequences. It involves the data analysis or creation of electronic databases on genomes and protein molecules is called (d) Method involves the replacement of corrective genes in place of defective genes in human. (e) In genetic engineering, the uptake of genes by the cells in animals is called 10. The diagram shows a vertical section through a mammalian heart. (I) Mention the position of followings in given heart diagram (a) Coronary artery (origin) (b) AV node (c) Coronary sinus (d) Chordae tendineae (II) Where the blood carrying little oxygen enters the heart and where it leaves the heart ? (III) The walls of the left and right ventricles have different functions 11. Match the column A with column B Column A (a) When the plant goes from water status A to water status B, it is said to have lost: (b) Which side would the leaves (leaf cells) have a more positive \|/w ? (c) Which side would the leaf cells have a more positive t|/s ? (d) Which side would the leaf cells have a more positive \|ip ? (e) Which side would you expect the soil to have a more positive t\iw ? 9, Give the perfect name to following branch of science/ statements/events/methods Column B 1. Derivatives of tyrosine a. Atrial natriuretic 2. Derivatives of tryptophan b. Androgen 3. Eicosanoids c. Prostaglandin 4. Derivatives of steroids d. Dopamine 5. Peptide hormone e. Estrogen f. Melatonin g- Epinephrine h. Thyroxine 12. Fill the correct answer in blank place from given box Rhodobacter. Azotobacter, Frankia, Klebsiella, Clostridium (A) (a) (b) (c) (d) (B) Free living nitrogen fixing bacteria: Obligate anaerobes Facultative anaerobes Photosynthetic bacteria Obligate aerobes Symbiotic nitrogen fixing bacteria . BIOLOGY TODAYMARCH'09 • 13. (a) (b) (c) (d) (e) Define/differentiate/describe/followings Stenothermal and Eurytherma! Anadromous fish and Catadromous fish Batesian and M'ullerian mimicry Standing crop Bergmann's rule 14. Give the answers of following questions on the basis of given description A scientist develops in vitro culture of foetal cells (from amniotic fluid) with phytohaemagglutinin. The foetal cells are cultured with colchicine. When these cells are placed in hypotonic solution, the cells become turgid or swelled. The water diffuses into the cell and separates the chromosomes. After that he put the chromosome on a slide, after staining he took a photograph of them. (a) (b) (c) (d) What actually scientist doing in this experiment? What is the role of phytohaemagglutinin in this experiment? What is the use of colchicines in this experiment? Scientist wants to give a name to photograph of chromosome. What would be the most probable name you want to suggest to scientist? (e) According to Denver system of classification human chromosome number 12 present in which group ? part is capable of giving rise to a microspore tetrad. The process of formation of microspores from a pollen mother cell through meiosis is called (c) Pollen grains have a prominent two-layered wall. The hard outer layer called the which is made up of (one of the most resistant organic material known). Pollen grain outer layer has prominent apertures called (d) The inner wall of the pollen grain is called the It is a thin and continuous layer made up of (e) When the pollen grain is mature it contains two cells, the .......fi) cell and ffl cell. The ffl cell is bigger, has abundant food reserve and a large irregularly shaped nucleus. The (?) cell is small and floats in the cytoplasm of the .(1) cell. In over 60 per cent of angiosperms, pollen grains are shed at this celled stage. 17. Give the answers of following questions with the help of given diagrams 15. Match the columns Column A Column B 1. Fibrous joints 2. First class le- b. between the adjacent vertebrae. ver 3. Cartilaginous joints a. the bones involved are joined together with the help of cartilages c. presence of a fluid filled cavity between the articulating surfaces of the two bones 4. Synovial joints d. it permits limited movements. 5. Second class lever e. do not allow any movement f. flat skull bones which fuse endto-end with the help of these type of joint and form sutures g- considerable movement h. fulcrum in the middle . i resistance is in the middle. 16. Fill in the blank (a) A typical angiosperm anther is with each lobe having theca, i.e., they are (b) When the anther is young, a group of compactly arranged homogenous cells called the occupies the centre of each microsporangium. As each cell of the this jjjjjjjjj; BIOLOGY TODAY | MAY 09 (a) Mention the colour, size, weight and position (with reference to vertebrae) of human kidney (b) Mention the positional asymmetry of kidney within the abdominal cavity and its due to (c) The Malpighian corpuscle, PCT and DCT of the nephron are situated in the region ? (Select from A or B) (d) Which type of nephrons does not have vasa recta ? (e) Identify structure 1,3 and 7 in diagram 18. Diagram representing a particular autosomal chromosome pair (for a Couple) with two non linked gene locus A and B .Find out the expected F2 generation phenotypic ratio in following crosses ? mm LocusA Locus B mm sum mm • • mm mm MM •• wmmm 11filfS ii ( I w «P w 1W LocusA mim1 „ w I t w I B IPw Locus B Cross 1. Dominant-recessive relationships in dihybrid parents at locus A X dominant-recessive relationships in dihybrid parents at locus B Cross 2. Dominant-recessive relationships in dihybrid parents at locus A X codominant relationships in dihybrid parents at Locus B Cross 3. Codominant relationships in dihybrid parents at locus A X codominant relationships in dihybrid parents at locus B Cross 4. Dominant-recessive relationships in dihybrid parents at locus A X codominant lethal relationships in dihybrid parents at locus B Cross 5. Codominant relationships in dihybrid parents at locus A X codominant lethal relationships in dihybrid parents at locus B 2- (a) tracheids (c) parenchyma egg. (h) True (i) True mass. (j) True 4. (a) G-cervix, H-cervical canal, I- vagina Mesovarium, ovarian ligament, broad ligament all Deuteromycetes a. Agaricus M-infundibulum/J-fimbriae, (d) C-glandular (c) 2. Basideomycetes b. Phytopthora Ascomycetes c. Heliminthosporium 4. Zygomycetes d. Peziza 5. Phycomycetes e. Claviceps f. Puccinia graminis tritici g- Penicilium h. Cyathus i Aspergillus j. Albugo k. Neurospora I. Ascobolus oryzae m. Amanita n. Fusarium monaliformis 0. Rhizopus P. Epidermophyton q- Altarnaria solani Define or differentiate followings Mass selection and its one disadvantage Pure line selection and its one disadvantage Clonal selection Heterosis or hybrid vigour Inbreeding and its consequences ANSWER ABCDE- (d) Heteromorphic extends from uterus(B) to ovary(F) 3. 1 (b) Western (f) True (e) True The sequence of cells in archegonium from upper to lower side is lid cells- neck canal cells-venter canal cell- Column B Column A 20. (a) (b) (c) (d) (e) (d) collenchyma (d) sderenchyma 3. (a) Autoecious (c) True 19. Match the column A with B 1. (b) sieve-tube cells Euspongia, Phylum-Porifera Aureiia (Medusa), Phylum-Coelenterata (Cnidaria) Fasciola Phylum - Platyhelminthes Nereis, Phylum - Annelida Balanoglossus, Phylum - Hemichordata D - smooth muscle E - thin membranous, (e) X-functional zone:layer closest to uterine cavity (A) and Y-basilar zone:adjacent to myometrium (D) 5. 1. Bacillus thuringiensis 2. cry 3a- crylAc, 3b, cryllAb, 3c, crylAb 4. alkaline 5. epithelial 6, 1 - • c; 2 — d; 3 — b; 4 — a; 5 - e 7. (a) Respiratory rhythm centre (b) Pneumotaxic centre Chemosensitive area (c) Aortic arch and carotid artery. (d) Inflation reflex (Hering-Breuer reflex) - occurs when (e) lung tissues are stretched: It helps regulate the depth of breathing: It reduces the duration of inspiratory movements: It prevents over inflation of the lungs during forceful breathing (b) A 8. (a) Turgidity (c) A - because as cells in B loose water, the same amount of solutes remain, causing the osmolality of the cell sap to increase. (d) A - because(B) has lost most of its cell pressure, and hence p would be far lower than (A). (e) A - plants that wilt are having trouble replacing water lost via transpiration from the soil this means the soil \|/„, is more negative in B. 9. (a) First-bactericidal, second-bacteriostatic (b) Proteomics (c) Bioinformatics (d) Gene therapy (e) Transfection. BIOLOGY TODAY ARPIL 262 10.1-1-C,2-B,-3-A,4-D II. Enter-A, leave-E III. Left ventricle pump blood to whole body/all organ/all organ system or In right ventricle less pressure than left ventricle 1 1 . 1 - d , g, h ; 2 - f , ; 3 - c ; 4 - b , e ; 5 - a 12. Clostridium, Klebsiella, Rhodobacter,Azotobacter, Frankia 13. (a) Stenothermal organisms live in areas where temperature remains nearly uniform throughout the year, on the other hand eurythermal organisms can tolerate large scale variations in temperature. They live in areas where there are different temperatures at different times of the year. (b) Anadromous fish live in the sea mostly, breed in fresh water (Greek: 'Ana' is up; The noun is "anadromy") Catadromous fish live in fresh water, breed in the sea (Greek: 'Cata' is down) (c) (i) Batesian mimicry - The mimic is defenseless. It has, however, resemblance to a dangerous or unpalatable model so that the predator usually does not prey upon it, e.g., Viceroy Butterfly mimics unpalatable toxic Monarch Butterfly. (ii) Mullerian mimicry - It is resemblance to two animal species, especially insects, both unpalatable/ferocious, to their mutual benefit, e.g., Monarch Butterfly and Queen Butter-fly (d) Each trophic level has a certain mass of living material at a particular time called as the standing crop. The standing crop is measured as the mass of living organisms (biomass) or the number in a unit area. The biomass of a species is expressed in terms of fresh or dry weight. (e) The rule known as Bergmann's Rule asserts that within a species, the body mass increases with latitude and colder climate. 14. (a) Karyotyping (b) It induces mitosis (c) Colchicine stops mitosis at metaphase. (d) Idiogram (e) Group-C 15.1 - e, f ; 2 - h ; 3 - a, b, d ; 4 - c, g ; 5 - i. ; 6• (a) Bilobed ,two theca, dithecous (b) sporogenous tissue, Microsporogenesis (c) Exine, Sporopollenin, germ pores (d) Intine, cellulose and pectin. (e) The vegetative cell 2-Generative cell, 2-celled 17. (a) Kidneys are reddish brown, bean shaped structures situated between the levels of last thoracic and third lumbar vertebra close to the dorsal inner wall of the abdominal cavity. Each kidney of an adult human measures 10-12 cm in length. (b) The asymmetry within the abdominal cavity caused by the liver results in the right kidney being slightly lower 78 BIOLOGY TODAY APRIL 09 than the left one while the left kidney is located slightly more medial. (c) A (d) Vasa recta is absent or highly reduced in cortical nephrons. (e) 1 - Renal pyramid, 3 - Renal artery, 7 - Ureter 18.1. 9 : 3 : 3 : 1 2. 3 : 6 : 3 : 1 : 2 : 1 3. 1 : 2 : 1 : 2 : 4 : 2 : 1 : 2 : 1 4. 3 : 1 : 6 : 2 5. 1 : 2 : 1 : 2 : 4 : 2 19.1 - c , n, p, q, 2 - a, f, h, m, 3 - d, e, g, I, k, I, 4 - o, 5 - b, j, o 20. (a) Mass selection - In this method, plants are selected based on their desirable morphological characters (phenotype). Their seeds are composite or mixed and the progenies are grown in masses. They are not individually tested. After repeated selection for about five to six years, selected seeds are multiplied and distributed to farmers. The only disadvantage of mass selection is that it is difficult to distinguish hereditary .variation from environmental variation. (b) Pure line selection - A pure line is a collection of plants obtained as a result of repeated self-pollination from a single homozygous individual. Hence, a variety formed by this method shows more homozygosity with respect to all genes. One disadvantage is that new genotypes are never created by this method. Genetic variability is essential for adaptations in different environmental and seasonal conditions. (c) Clonal selection - Crops like sugarcane, potato, tea, banana and certain species of grasses are asexually propagated and produce very poor seeds. Based on their phenotypic appearance, the method of clonal selection is employed to select improved variety from a mixed population (clones). Selected plants are multiplied through vegetative propagation to give rise to a clone. The genotype of a clone remains unchanged for a long period of time. (d) The superiority of the F, hybrid in performance over its parents is called heterosis or hybrid vigour. Vigour refers to increase in growth, yield, resistance to diseases, pests and drought. (e) When two individuals ofthe same species are crossed, it is called inbreeding or selfing or self-pollination. This results in the increase of homozygosity. Particularly homozygous recessive alleles develop loss of vigor in plants. CBSE-PMT MAINS 2009 Veri-Similar Practice Paper-2 -Prof. Siddharth Sanghvi 1. Identify the following bones of humans (a, b, c, d, e) and parts (A, B, C, D, E) associated with them? (b) Write the name of cell layer on which casparian strip is deposited and also write the composition of casparian stripe (c) Pathway number 2 above shows a K + ion being taken into structure X and then flowing from cell to cell and ultimately into the xylem. What is the term for the route illustrated as pathway number 2? (d) As diagrammed, K+ flows from cell to cell through what structure? (e) Pathway number 1 above shows a K + ion entering a root and flowing to the endodermis. What is the term for this route of mineral uptake in roots as illustrated in 1 above? (a) 3. Fill in the blanks (a) The most dramatic examples of habitat loss come from tropical rain forests. Once covering more than per cent of the earth's land surface, these rain forests now cover no more than per cent. (b) The Amazon rain forest is so huge that it is called the They are harbouring probably millions of species is being cut and cleared for cultivating or for conversion to grasslands for raising (c) The branch of river introduced into Lake Victoria in East Africa led eventually to the extinction of an ecologically unique assemblage of more than 200 species of fish in the lake. (c) (e) Give the answers of following questions on the basis of given diagram Casparian strip (d) Like carrot grass (Parthenium), Lantana and water hyacinth (Eichhornia),the recent illegal introduction of the African catfish named for aquaculture purposes is posing a threat to the indigenous catfishes in our rivers. (e) Initially biodiversity hotspots were identified but subsequently nine more have been added to the list,bringing the total number of biodiversity hotspots in the world to 4(a) (a) Identify structure X and write the name of cell Y from which structure X originated ? Fill in the blanks Every 100 ml of oxygenated blood can deliver around ml of 0 2 to the tissues under normal physiological conditions. (b) Every 100 ml of deoxygenated blood delivers approximately ml of C0 2 to the alveoli. BIOLOGY TODAY ARPIL 264 (c) Blood is the medium of transport for 0 2 and C0 2 . About per cent of 0 2 is transported by RBCs in the blood. The remaining per cent of 0 2 is carried in a dissolved state through the plasma. (d) Nearly per cent of C0 2 is transported by RBCs whereas per cent of it is carried as bicarbonate. About per cent of C0 2 is carried in a dissolved state through plasma. (e) A curve is obtained when percentage saturation of haemoglobin with 0 2 is plotted against the 5. The diagram shows the parts of the nervous system which act when the hand touches a hot object. Give the answers of following questions. (f) Homology is based on divergent evolution. (g) Homologous structures are a result of convergent evolution. (h) Examples of analogy are the eye of the octopus and of mammals. (i) Flippers of penguins and dolphins are examples of homology. (j) Sweet potato (root modification) and potato (stem modification) is example for homology. 8. Given table representing important plant products and their resources as well as their human uses. Fill the blank information with the help of other two information of respective query (Any-10) No. Product (a) Artemisin (b) (e) Codeine (f) Digoxin Digitalis lanata (d) 6. Match the column A with column B s. No. 1. 2. 3. 4. 5. Column A Porifera Coelenterata Platyhelminthes Aschelminthes Annelida Column B (g) Diosgenin (h) (i) Quinine (j) Shikonin (k) (I) Anti-fertility Datura stramonium Anti-hypertensive Anti-malarial Taxus spp. Cathranthus roseus Antimicrobial, Red pigment used in lipstics & dye for silk Anti-carcinogenic Anti-carcinogenic 9. Given diagram representing pBR322, Give the answers of following question on the basis of given diagram and your knowledge? With false coelom With true coelom Radial symmetry Without body cavity (e) Cellular level of organization (a) (b) (c) (d) 7. Select the true and false statements (a) Whales, bats, cheetah and human (all mammals) share similarities in the pattern of bones of forelimbs. (b) The same structure developed along different directions due to adaptions to different needs. This is convergent evolution and these structures are analogous. (c) Analogy indicates common ancestry. (d) Vertebrate hearts and brains are the examples of analogy. (e) In plants,the thorn and tendrils of Bougainvillea and Cucurbita represent homology. i Human uses Insecticidal Antibacterial, Anti-inflammatory Capsicum annuum Reumatic pain treat(chilli) ment Analgesic (c) Berberine (a) Structure A, B, C, D, E representing respectively (b) What happens to muscle Y when impulses arrive at point XI? (c) What happens to muscle Z when impulses arrive at point X2? (d) Which part from P or Q known as dorsal root? (e) Moving the hand away from the hot object is a reflex action. What is a reflex action? Plant source Artemisia spp. Azadirachta indica — — __ Pvull (a) What is pBR322 ? and pBR denotes for (b) What is insertional inactivation (c) Mention the complete name and recognition sequence for BamH I (d) rop gene codes for (e) If DNA is cloned into the BamHI site in the Tetr gene, than draw a replica plating conformation experiment for Transformants 10. Fill in the blanks Aspergillus is a member of ascomycetes. It is most commonly contaminates cultures in the laboratory and hence called A. flavus (called of plant kingdom) grows on stored cereal grains, groundnut and area nuts produce a carcinogenic toxin called Most of the species are saprophytic and grow on dead organic matter. is a saprophyte but also causes pulmonary aspergillosis and ear infection (otomycosis) in man is exploited in the production of citric acid and oxalic acid from molasses. 11 Select the labelled number from diagram for the statements/ items mentioned below. (b) Leguminous plants accumulate more than 80 Kg of nitrogen per hectare in the soil when grown as green manures. (c) Azolla is an aquatic fern, which contains an endophytic cyanobacterium Anabaena azollae in its leaves. It is used as a biofertilizer in rice field. (d) Out of six species of Azolla, A. pinnata is widely employed as a successful biofertilizer in Indian rice fields. It adds 30 Kg of nitrogen per hectare. (e) A triploid condition in sugar beats, apples and pear has resulted in the increase in vigour and fruit size, large root size, large leaves, flower, more seeds and sugar content in them. Fill in the blanks. (a) A weed commonly called mouse-eared cress has been engineered to produce a biodegradable plastic known as in tissue granules. (b) In 1979, for the first time , an Indian born American scientist named developed a strain of that corftained'S hybrid plasmid that was capable of metabolizing hydrocarbons(crude oil). (c) A Plasmid which was capable of metabolizing hydrocarbons(crude oil) is derived by combining parts of plasmid X * :.. and .' Y are the plasmids which contain the genes responsible for the decomposition of the hydrocarbons like camphor and octane respectively present in the oil. (d) Rice with saline tolerance and pest resistance is (e) Pyrethrum extracted from the inflorescence of belonging to Asteraceae. 14. Match the numbered antibiotic with its effect Antibiotics (a) Rugal folds present here. (b) Lies in right hypochondriac and epigastric regions and extends to left hypochondriac and umbilical regions. (c) Origin of duct of Wirsung (d) Chyle is a milky fluid (bodily fluid) consisting of lymph and emulsified fats, or free fatty acids (FFAs). It is formed here. (e) It is a slender, hollow appendage (about 9 cm long), dominated by lymphoid nodules (a lymphoid organ) If infected, it results in general abdominal infection (peritonitis). Select true and false statements. (a) Various leguminous plants like Crotalaria juncea, Cassia mimusoides, Glycine max, Indigofera linifolia, Sesbania rostrata, Acacia nilotica, Leucena, Lathyrus and Mucuna are used as green manures. Effect inhibits binding of amino-acyl t(a) (I) Tetracyclines RNA to ribosome inhibits initiation of translation (b) (ID Streptomycin and causes misreading inhibits peptidyl transferase and (III) Chloramphenicol (c) so formation of peptide bonds inhibits translocation of m-RNA '(IV) Erythromycin (d) along ribosome inhibits interaction between t(v) Neomycin (e) RNA and m-RNA (a) (b) (c) (d) (e) Describe following. Asthma Emphysema Occupational Respiratory Disorders Haldane effect Bohr effect J| BIOLOGY TODAY MAY '266 16. Fill the appropriate options(a-m) from given box to skeletal, smooth and cardiac muscle for the following features. Features Options 1. Muscle (a) Cylindrical fiber shape (b) Branched (c) Fusiform 2. Nerve end- (d) Motor end ings plate (e) Varicosities 3. Mitochon- (f) Few dria (g) Many (h) Less 4. Sarcomere (i) Regular (j) Absent ++ 5. Ca bind- (k) Troponin ing protein (I) Calmodulin Skeletal Cardiac muscle Muscle X Y Smooth Muscle Z (d) Structure X is a cytological derivation of (e) Mention the name of another structure which is similar to structure A in regulation of opening and closing (A) Fill here Fill here Fill here Fill here Fill here Fill here Fill here Fill here Fill here Fill here Fill here Fill here (B) Fill here Fill here Fill here Peri microtubule (doublet) 17. Match the columns Column A 1. PCT Column B (a) simple cuboidal brush border epithelium 2. Descending (b) selective secretion of hydrogen ions, ammonia and potassium ions limb of loop of into the filtrate and by absorption Henle of HCOs 3. Collecting duct (0 filtrate gets diluted 4. Ascending limb (d) the filtrate gets concentrates 5. DCT (e) permeable to water but almost impermeable to electrolytes. (f> impermeable to water but allows transport of electrolytes actively or passively. (g) 70-80 per cent of electrolytes and water are reabsorbed (h) conditional reabsorption of Na + and water (i) reabsorption of HC0 3 (j) J| large amounts of water could be reabsorbed from this region to produce a concentrated urine. 18. Given the answers of followings questions on the basis of given diagrams (a) Given diagrams A & B representing respectively (b) Write the name and nature of structure X & Y (c) Write the total number of proto-filaments involved in diagram B. BIOLOGY TODAY ARPIL 267 Central microtuble Radial spoke 19. Column A representing examples. Fill in the Column about anomalous primary structures. S. No. 1. 2. 3. 4. 5. Column A Wheat, barley, rice Tamus, Asparagus. Peperomia, Anemone Nyctanthes, Casuarina Potato, Calotropis. Column B- anomalous primary structures (a) (b) (0 (d) , (e) (A) Give the answers of following question : (a) In the light reactions of photosynthesis, oxygen is evolved. From what molecule is oxygen derived? From which process, and in what precise location, does this occur (b) Imagine that a C3 plant and a C4 plant of the same age and biomass share a sealed glass container at 25°C. Both receive adequate light, water and nutrients. What will happen to the two plants over time? What if the container was not sealed and the temperature was 10°C? ( 0 In attempts to increase photosynthetic yield, genetic engineers have created plants which "overexpress" the enzyme rubisco. This means that the plants make much more rubisco than they normally would. However, the 20. engineered plants have been a disappointment, since their photosynthetic rates are not boosted by the extra Rubisco. From what you know about rubisco and limits to photosynthesis, can you explain these results? (B) Diagram A & B representing types of stomata on the basis of no. and orientation of subsidiary cells. Identify them. ANSWERS 1. 2. 3. (a) - scapula, A-acromion process (b) - Part of pelvic girdle/or coxal bone, -acetabulum (c) - foot Bones, C-calcaneus (d) -Atlas, D-Facets for articulation with occipital condyle (e) - Cervical vertebra, E-bifid spinous process (a) X-Root hair,Y-Trichoblast Endodermis, Lignin and suberin The symplastic route (c) (d) Plasmodesmata (e) The apoplastic route (a) 14 percent, 6 percent (b) 4. (c) (d) (e) (a) (0 (e) 5. (a) (b) (c) (d) (e) lungs of the planet', soya beans, beef cattle Nile, cichlid fish Clarias gariepinus 25, 34. 5 ml (b) 4 ml 97, 3 (d) 20-25, 70, 7 sigmoid, p0 2 . A - The receptor - The sensory neuron C - Integrating center D - the motor neuron E - Effector organ Y-(Biceps muscle) contracts/shortens Z (Triceps muscle) relaxes. P A reflex is an involuntary or automatic, action that your body does in response to something - without you even having to think about it. 1 - (e), 2 - (c), 3 - (d), 4 - (a), 5 - (b) 7. (a) True (d) False (g) False (j) False (b) (e) (h) False True True (c) (f) (i) False False False 8. (a) 1 Antimalarial Coptis japonica Papaver spp. J s L Dioscorea deltoidea (i) Cinchona officinalis (k) Taxol i d (e) (b) Azadirachtin (d) Capsaicin (f) Cardiac tonic M . Scopolamine (i) Lithospermum I (I) Vincristine erythrorhizon (a) pBR322 is an example of an artificial plasmid cloning vector.The name pBR denotes the following: p signifies plasmid, B is from Boliver, and R is from Rodriguez, the two initials of the scientist who developed pBR322. (b) Insertional inactivation - Subcloning a DNA fragment into an active gene (usually a marker gene whose function can be easily detected) will disrupt the function of that gene. This can be detected by looking for colonies that no longer display that phenotype I (c) Bacillus amylolique faciens Bam H1 5'GGA TCC3' 3'CCt AGG 5' t Rop codes for the proteins involved in the replication of the plasmid. Colonies are plated onto ampicillin plates Individual colonies transferred with a sterile toothpic to media containing tetracycline (left) or ampicillin (right) Amp - Tet colonies Recovered for further analysis 10. 1. 2. 3. 4. j 5. weed of laboratory. Guniea pig of plant kingdom aflatoxin. A. fumigatus A. niger 11. ( a ) - 1 0 ( b ) - 3 ( c ) - 1 7 ( d ) - 7 and 1 4 ( e ) - 9 BIOLOGY TODAY MAY 09 85 19. (a) - Vascular bundles in rings in monocot stem All statements are true. 13. (a) (b) (c)' (d) (e) Arabidopsis thaliana, polyhydroxybutyrate, or (PHB) Anand Mohan Chakrabarty, Pseudomonas putida X-CAM, Y-OCT Atomita 2 Chrysanthemum 14. (|) - (a), (II) - (b), (III) - (c), (IV) - (d), (V) - (e) (a) Asthma is a difficulty in breathing causing wheezing due to inflammation of bronchi and bronchioles. (b) Emphysema is a chronic disorder in which alveolar walls are damaged due to which respiratory surface is decreased. One of the major causes of this is cigarette smoking. (c) Occupational Respiratory Disorders: In certain industries, especially those involving grinding or stone-breaking, so much dust is produced that the defense mechanism of the body cannot fully cope with the situation. Long exposure can give rise to inflammation leading to fibrosis (proliferation of fibrous tissues) and thus causing serious lung damage. (d) Haldane effect-Binding of oxygen with haemoglobin tends to displace carbon dioxide from the blood. (e) Bohr effect-Shifting of the oxygen Haemoglobin dissociation curve to rFght by increasing carbon dioxide partial pressure is known as Bohr Effect. 16. 1. 3. 5. X-a, Y-b, Z-c X-f, Y-g, Z-h X-k, Y-k, Z-l 2. 4. X-d, Y-e, Z-e X-i, Y-i, Z-j 17. 1 - (a, b, g); 2 - (d, e); 3 - (j); 4 - (f); 5 - (c,h,i) (a) A-Lertticei, B-Cross section of shaft of cilia/flagella (b) X-Complementary cells, nature-Parenchymatous Y-Dyanin-nature-motor protein (c) 24-23 X 9 + 13 X 2 =231-240 (d) Phellogen (e) Hydathodes Contd. from pg no. 12 The inner membrane is semipermeable and rich in proteins including carrier molecules. It has permeases that control the passage of molecules. Like the inner mitochondrial membrane, it is also greatly infolded, but the infolds become free in the mature chloroplast to lie as lamellae in the matrix, (b) Matrix It is colourless, granular, colloidal ground substance called stroma. It contains proteins, lipids, small (70S) ribosomes, a small circular double helical DNA molecule, RNA molecules (rRNA, tRNA and mRNA), enzymes, lipid droplets called plastoglobuli, and certain metal ions (Fe, Mn Mg). The enzymes catalyse the synthesis of photosynthetic pigments, photolysis of water, photophosphorylation, dark assimilation of carbon dioxide, and synthesis of starch, lipids, etc. J| BIOLOGY TODAY MAY '09 (b) - Presence of cortex, endodermis, pericycle and pith, (c) - Scattered vascular bundles in dicot stem (d) - Vascular bundles in cortex/cortical bundles. (e) - Intraxylary (internal) phloem or inner-side of cambium 20. (A) (a) Oxygen evolves when water is split in the oxygenevolving-complex of photosystem II in the lumen of the thylakoid membrane (b) If both are in the sealed jar the C4 will be efficient at low concentrations of C0 2 , while the C3 plant will "photorespire itself to death". The C0 2 from the C3 plant will be fixed by the C4 plant. At low temperatures, in the unsealed jar the two plants will survive, but the C3 plant is more efficient at low temperatures due to the decrease of dissolved 0 2 , and higher energy cost of C4 photosynthesis. (c) The rate of carbon fixation is not limited by the amount of rubisco in leaves. In fact most leaves have an excess of rubisco (B) anomocytic, anisocytic • • m Prof. Siddharth Sanghvi Having experience of 11 years, he started teaching for medical entrance at the age of 17 years in 1997, that time he was himself a PMT aspirant. After cracking PMT he opted for teaching as a profession and now it has become a passion for him. He has worked with different institute of indore and kota in the span of 11 years as a faculty member of biology. Presently he is working with Rankers point as a HOD of Botany. His expert guidance has helped his student in securing TOP Ranks in different medical entrance. Cell - 09425107550, Web : www.wxyz.in,e-mail-sidd@wxyz.in (c) Thylakoids The lamellae, after separation from the inner membrane, usually takes the form of closed, flattened, ovoid sacs, the thylakoids, which lie closely packed in piles, the grana. A thylakoid encloses a very narrow intrathylakoid space bounded by a unit membrane. The thylakoids of adjacent grana are interconnected by branching, membranous tubules termed frets, or stromal lamellae. The later are also called intergranal thylakoids. A chloroplast may have 40 to 100 grana in its matrix. A granum is composed to 20-50 thylakoids in the chloroplasts of higher plants. Algae have a few thylakoids that do not form grana. They are said to be agranal. The thylakoid membrane contains photosynthetic pigments, namely, chlorophyll a, chlorophyll b, carotenoids (carotene, xanthophylls) and plastoquinone. The pigments occur in groups termed SOLVED PAPER 2 0 0 9 MAINS (a) Erythropoietin (i) Collateral glands 4, (a) (c) (e) (b) Smooth muscle fibres (ii) Typhlosole 5. (0 Cockroach (iii) Involuntary (d) Petromyzon (iv) Gizzard (a) Bacterial disease in cattle (i) Rinderpest (v) Hormone (b) Fresh water fishes (ii) Rohu (vi) Radulla (c) Water born disease in human (iii) Catla 1. (i) Match the contents of column-l with those of column-ll. Column-ll Column-l (vii) Juxtaglomerular cells (viii) Circular mouth Define the following terms Point mutation (b) Germplasm (d) Adaptation Match the contents of column-l with column-ll. Column-ll Column-l (d) Parasitic protozoan (iv) Plasmodium (e) Important toxicant in water (v) Paramecium (ix) Fusiform (vi) Cholera (x) Wall of blood vessels (vii) Anthrax (xi) Choanocytes (viii) Cowpox (ii) Some terms in column II are not matching with column I. Write those terms alongwith the phylum in which they are present. 2. (b) (c) (d) (e) Transcription unit Biofortification (a) Some persons say, there are no flowers in banyan tree. Comment on it. Write two characteristics of hot spot. Name any two hot spots of India. Write one difference between pathogen and parasites. Define phyllode and phyllodade. Give one example of each. Yeast is a prokaryote or eukaryote. Give evidence in favour of your answer. 3. Read the statements(i) to (v) carefully and (a) find out the correct statements. (b) find out the incorrect statements and correct them by changing bold words. (i) Skull, ribs, sternum and vertebral column form axial skeleton (ii) Conduction of impulse along axon membrane takes place due to repolarization and depolarization waves. (iii) Myoglobin present in some muscles gives redish colour. (iv) Common hepatic duct is formed by bile duct and pancreatic duct. (v) Amniotic fluid diagnosis is misused in termination of pregnancy. 6. (a) (b) (c) (d) (e) (ix) Sardine (x) Malaria (xi) Arsenic (xii) Copper Select the false statements from the following and correct them by changing only bold words. In garden pea dwarf plants are hybrid and when they are crossed with each other, they produce 50% dwarf plants Earthworm is hermaphrodite and has true coelom Enzymes similar in structure and activity are called coenzymes Nitrogenous waste product in human is uric acid, while urea is in cockroach At the time of splicing process exons are removed and introns join together. Fill in the blanks with the suitable word from the following : Primary, apical, intercalary, lateral, pond, tree, sedge, xylem, secondary, phloem, forest, desert, xenogamy, geitonogamy, proteins, mulberry, castor, papaya, phytoplanktons, Rhodospiriltum, Chlorelta, Agrobacterium, Gliocladium, vacuole, chloroplast, cambium, monoecious, Anabaena (a) In primary succession, in a the pioneer plants are (b) The increase in girth of plants is called growth which is caused by the activity of meristem. Contributed by : OES, New Delhi, Tel : 011-26124025 BIOLOGY TODAY ARPIL 270 Transport of endodermal cells are control points, where a plant adjust the quality and quantity of solutes reaching the are monoecious plants. They (d) Both maize and can prevent autogamy, but not are used as (e) Microrganism like species of biopesticides, while those of are used as biofertilizers. (C) 8. (a) Write the correct sequence of above diagrams (A), (B) and (C). (b) Label part (1) in diagram A and write down its function. (0 Label part (2) in diagram B and write down its function. (d) Label part (3) in diagram C and write down its function. (e) What is the correct place of fertilisation in female reproductive system? (f) At which stage implantation takes place? 9. (iv) Identify the given diagram and select suitable example for this diagram from the given list. Priomrose, Diathus, Hollyhock, sunflower, lemon, gram. (v) Identify the given diagram and label the parts marked as (g) and (h). Write down its two method of transmission. (i) Identify the given diagram and label the parts marked as (a) and (b). 0,9 c QUf \o9o mf V V 10. (i) Write three main reasons for maximum bio-diversity in tropical rain forests. (ii) What does IUCN stand for? (iii) What do you mean by sacred grooves? Name such grooves in Meghalaya. Rajasthan and Madhya Pradesh. (iv) When, where and in which country Earth Summit /World Summit was held? Match the columns and answer the questions given below. i (ii) Identify the given diagram and label the parts marked as (c) and (d). (c) (iii) Identify the given diagram and label the parts marked as (e) and (f). BIOLOGY TODAY ARPIL 271 Column-I (I) Nereis, Earthworm, Pila, Leech Column-ll Column-Ill Bilateral, metamerism Phylum (ii) Shark, Whale, Dol- Bony endoskel- Chambers heart eton, vivipary phin, Bat of (iii) Ostrich, Lizard Homeothermy, Peacock, Duck ovipary billed platypus (iv) Starfish, Sea Radial symmetry, Level of organianemone, Sea Cu- dorsal hollow sation cumber, Sea urchin nervous system Nourishment to young ones (a) Which characters of column-ll are common among the animals of column-l ? (b) Which animals in column I are odd one out on the basis of the characters given in column-Ill ? (a) Identify the given diagram with its location in human body. " I (i7 (3) Match column-l with column-ll Column-l Column-ll (a) Usnea (0 Zoospore (b) Mucor (ii) Zygospore (c) Zea mays (iii) Velamen (d) Equisetum (iv) Naked seed (e) Ginkgo biloba (v) Mutualism (Vi) Predation (Vii) Living fossil (viii) Genetically modified crop (ix) Rust (X) Horse tail (xi) Urediniospore j v"-' j (Xii) . " • "I(xiii) Mycobiont i Club moss (xiv) Runner (XV) Indehiscent fruit (xvi) Scutellum Match column-l with Columri-ll Column-l (a) Mutualism Column-ll (i) One species get benefitted other neither benefitted nor harmed ESP (Electrostatic (ii) precipitator) Ozone depletion Sewage waste (iii) Methane (d) Montreal protocol (iv) S0 2 (e) J. shaped curve (b) ten | M ~ Phytoplankton growth in river water (Vi) N t = N0eTt (Vii) Both species get benifitted (viii) Zoo (ix) 1 Particulate matter (X) Exponential growth (xi) CFC (xii) orchid branch with mango (xiii) Fish mortality (xiv) Industrial exhaust (b) Label part (2) and write down the name of fluid present in it. (c) Label parts (4), (5) and (6) and explain how do these help in the functioning of above diagram? Write the type of placentation, inflorescence and fruit of the following plants: (a) Poinsettia (b) Merigold (c) Onion (d) Brinjal (e) Radish (i) (ii) (iii) (b) (c) (a) What is the genetic basis of each of the given genetic disorders, also give the information as asked against each of them. Down's syndrome - specific feature on palm. Turner's syndrome - Abnormalities in gonads Klinefelter^ syndrome - Appearance of opposite sex character. How do dolphin and penguin show convergent evolution? Ramapithecus was more ape like, while Dryopithecus was more man like. State whether the above statement is correct or incorrect. If incorrect, then rewrite the statement. Fill in the blanks with the help of following given words. Extinct, north-eastern, tropical, fig, Ficus, Glomus, northern, southern, Pinus, diversity, Ustilago, rust, smut, Staphylococcus, Flemming, Azospirlllum, Pastuer, Selaginella, Chara (a) In (1) areas (2) acts as keystone species. (b) The species those are (3) in (4) parts of India are due to jhoom cultivation. (c) Loose (5) in wheat is caused by (6) (d) (7) could not grow on Penicillum containing culture, it was first observed by (8) (e) Beside Polytrichum and (9) female sex organ archegonia are also present in (10) Contd. on page no. 87 BIOLOGY TODAY ARPIL 272 AM.1=1 (a) AAGCTT (b) AAGTTC (c) GTATAC (d) GAATTC. Botulism is a type of food poisoning due to obligate anaerobic bacterium (b) disease in man due to parasitic bacterium (c) disease in various organisms (d) disease of plants due to viruses. (a) 3. A bacteriophage possesses an enzyme protease (b) urease (d) lysozyme. (c) dehydrogenase 4. The largest herbarium of the world is located in (a) Royal Botanical Garden, Kew (b) Central National Herbarium, Sibpur (0 Museum of Natural History, Paris (d) Madras Herbarium, Coimbatore. (a) (a) (c) 6. (a) (b) (c) (d) 7. (a) (b) (0 (d) 8. (a) (c) 9. (a) (0 10 (a) (c) Female sex organ of rhodophyceae is called trichogyne (b) ascogonium carpogonium (d). oogonium, Cycas ovule is orthotropous and unitegmic orthotropous and bitegmic anatropous and unitegmic none of the above. Barr body is nucleolus facultative heterochromatin constitutive heterochromatin euchromatin. Modulators inhibit enzyme activity function as coenzymes (b) stimulate enzyme activity (d) both (a) and (b). Meicsis occurs in embryo sac megaspore mother cell (b) megaspore (d) nucellus. A recessive character in pea is red flower (b) round seed green cotyledons (d) tall plant. 11 The back cross is (a) a cross between F, individual and F2 individual BIOLOGY TODAY | JUNE27323' (b) a cross between F, individual with another F, individual (c) cross between F, and one of the two parents (d) cross between F2 with one of the parents. 12. Which one can induce polyploidy? (a) colchicine (b) acridines (c) ethylene (d) maleic hydrazide. 13. Polypeptide chain in eukaryotes is initiated by (a) glycine (b) leucine (c) methionine (d) lysine. 1 In Utricularia, the leaves are modified to form (a) bladders (b) tendrils (c) hooks (d) pitchers. Which is a base analogue? (a) bromodeoxyuridine (b) hydroxylamine (c) colchicine • (d) nitrous acid. 16. Commercial production of citric acid is by (a) Penicillium (b) Aspergillus (c) Rhizopus (d) none of these. 17. Which is not the characteristic feature of fabaceae? (a) tap root system, compound leaves, raceme inflorescence (b) flowers actinomorphic, aestivation twisted and gamopetalous (c) stamens 10, introrse, basifixed, bithecous (d) monocarpellary, ovary superior and bent stigma. Which of the following is basic amino acid? (a) threonine (b) glycine (c) lysine (d) cysteine. In which phase of cell cycle DNA polymerase is active? (d) M. (b) S (0 G, (a) G, Water exudation through hydathodes is (a) guttation (b) hydrolysis (c) transpiration (d) excretion. Which deficient mineral nutrition produces necrosis? (a) Mg (b) B (c) Mo (d) S. (a) .(c) 23. (a) (c) C55H74 0 6 N4 Mg is empirical formula of chlorophyll b (b) chlorophyll a chlorophyll c (d) none of these. The R.Q of fat is less than unity (b) equal to unity zero (d) more than unity. 24. End product of glycolysis is (a) acetyl Co-A (b) 1 molecule pyruvic acid (c) 2 molecules pyruvic acid (d) glucose 1-phosphate. 37. Energy flow in an ecosystem is (a) unidirectional (b) bidirectional (c) multidirectional (d) all of these. 25. Cytochrome oxidase complex contains (a) cytochrome a (b) cytochrome c, (c) cytochrome b (d) cytochrome c. 38. (a) (b) (c) 26. Seedless fruits are developed by (a) cytokinins (b) auxins (c) ethylene (d) abscisic acid. 27. (a) (b) (c) (d) Insecticide rotenones are obtained from Chrysanthemum coccineum Ureginea maritima Derris etliptica Azadirachta indica. 28. (a) (b) (c) (d) SCP producing fungus is Fusarium graminearum Helminthosporium oryzae Cercospora personata Cochilobolus miyabeanus. 29. Severe famine of West Bengal of 1942-43 was due to destruction of rice crop by a fungus called (a) Penicillium (b) Helminthosporium (c) Rhizopus (d) Puccinia. 30. (a) (b) (c) (d) Silicosis is caused by acid rains depletion of ozone inhalation of crystaline silica dust inhalation of S02. 31. A submerged rooted hydrophyte is (a) Utricularia (b) Trapa (c) Vallisneria (d) all of these. 32. The induced fit theory of enzyme action was given by (a) Fischer (b) Koshland (c) Hershey & Chase (d) Summer. 33. (a) (b) (c) (d) What is agent orange? colour used in fluorescent lamps a weedicide containing dioxin a biodegradable insecticide hazardous chemicals used in paints. 34. Forest Research Institute is situated at (a) Lucknow (b) Bhopal (c) Hyderabad (d) Dehradun. 35. Mesophyll is undifferentiated into palisade and spongy parenchyma in (a) dorsiventral leaf (b) Isobilateral leaf (c) both (a) and (b) (d) none of these. 36. Amount of living biomass present in an ecosystem is known as (a) standing crop (b) standing state (c) stratification (d) productivity. 'Nemec phenomenon' relates to 7 celled female gametophyte 8 nucleated male gametophyte formation of pollen kitt (d) none of these. 39. A petroleum plant is (a) sugarcane (c) potato (b) maize (d) Euphorbia. 40. VAM is component of (a) ectomycorrhiza (c) mycoherbicides (b) endomycorrhiza (d) green manure. 41. Sphaerosomes are associated with (a) protein metabolism (b) lipid metabolism (c) nitrogen metabolism (d) glycolate metabolism. 42. Development of sporangium in Selaginella is (a) eusporangiate (b) leptosporangiate (c) both (a) and (b) (d) none of these. 43. Pomalin is combination of (a) cytokinin & gibberellin (b) gibberellin & auxin (c) auxin & ethylene (d) abscisic acid & ethylene. 44. The repressor molecules which unite with operator gene to stop transcription are produced by (a) regulator gene (b) promotorgene (c) inducer gene (d) structural gene. 45. Which one is snail mediated pollination? (a) ornithophily (b) entomophily (c) myrmecophily (d) malacophily. 46. Multiple shoot culture is stimulated by (a) IBA (b) PEG (c) both (a) and (b) (d) cytokinin. 47. (a) (b) (c) (d) Dermatogen produces epidermis epidermis, hypodermis and cortex hypodermis, cortex and endodermis pericycle, vascular strand and pith. 48. Which of the fallowings are non-membranous organelles? (a) microbodies (b) vacuoles (c) ribosomes (d) chloroplasts. 49. Aril represents edible part of (a) litchi (b) apple (c) mango (d) banana. 50. Syngenesious stamens are found in (a) liliaceae (b) solanaceae (c) asteraceae (d) poaceae. 51. Which of the following endocrine glands functions as a biological clock and a neurosecretory transducer? (a) adrenal gland (b) thyroid gland (c) pineal gland (d) thymus gland. BIOLOGY TODAY | JUNE2323' 52. Foetal sex can be determined by examining cells from the amniotic fluid by looking for (a) chiasmata (b) kinetochore (c) barr bodies (d) autosomes.. (c) stimulate the function of visceral organs by secreting acetylcholine (d) inhibit the function of visceral organs by secreting acetylcholine. 53. The breeding place of Flamingo (Hansawar) in India is most likely (a) RunnofKutch (b) Ghana Vihar (c) Sambhar lake (d) Chilka lake. 63. (a) (b) (c) (d) 54. Which of the following drugs is known to produce increased wakefulness and focus in association with decreased fatigue and appetite? (a) amphetamines (b) barbiturates (c) hallucinogens (d) analgesics. 55. Implantation ofthe zygote takes place at which embryonic stage? (a) gastrula (b) morula (c) blastula (d) secondary oocyte. 56. Which one of the following transmits impulses to central nervous system? (a) abducen nerve (b) trochlear nerve (c) oculomotor nerve (d) auditory nerve. 57. Which ofthe following is a method of birth control? (a) lUDs (b) GIFT (c) HTF (d) IVF-ET. 58. During regeneration, modification of an organ to other organ is known as (a) morphalogenesis (b) epimorphosis (c) morphallaxis (d) acretionary growth. Besides annelida and arthropoda, the metamerism is exhibited by (a) cestoda (b) mollusca (c) chordata (d) acanthocephala. 60. Darwin's theory of pangenesis shows similarity with theory of inheritance of acquired characters then what shall be correct according to it (a) useful organs becomes strong and developed while useless organs become extinct (b) size of organs increase with ageing (c) development of organs is due to will power (d) there should be some physical basis of inheritance. Pancreatic juice takes part in the digestion of (a) proteins and fats (b) carbohydrates and proteins (c) carbohydrates and fats (d) proteins, fats and carbohydrates. Sympathetic fibres of the autonomic nervous system (a) stimulate the function of visceral organs by secreting epinephrine (b) inhibit the function of visceral organs by secreting epinephrine 16 BIOLOGY TODAY |MARCH'09 Spermiogenesis is the process in which spermatids change into spermatozoa spermatogonia produce spermatids spermatocytes give rise to spermatozoa dormant spermatozoa become active just before ejaculation. 64. Which one is the larva of starfish? (a) bipinnaria (b) nauplius (c) glochidium (d) trochophore. 65. (a) (b) (c) (d) Down's syndrome is caused by trisomy of 21st chromosome deletion of 5th chromosome monosomy of 21st chromosome monosomy of 18th chromosome. 66. What is heterosis? (a) hybrid incompatibility (c) hybrid sterility 67. (a) (b) (c) (b) hybrid vigour (d) apomixis. 'Red Data Book' provides data on biota of red sea effect of red light or photosynthesis red pigmented plants (d) threatened species. 68. What is true about T-lymphocytes in mammals? (a) there are three main types-cytotoxic T-cells, helper T-cells and suppressor T-cells (b) these originate in lymphoid tissues (c) these scavenge damaged cells and cellular debris (d) these are produced in thyroid. 69. Which one of the following is not a steroid hormone? (a) estrogen (b) androgen (c) aldosterone (d) thyroxine. 70. Which disease pair would spread through blood transfusion? (a) cholera and hepatitis (b) AIDS and hepatitis (c) diabetes mellitus and malaria (d) hay fever and AIDS. 71 • (a) (c) 72. the (a) (c) (d) The wishbone of the birds is derived from pelvic girdle (b) skull pectoral girdle (d) vertebrae. Fluid within the loop of Henle is most concentrated in ascending limb (b) descending limb hairpin bend bend between the ascending limb and the distal tubule. Joint between humerus and radio-ulna is (a) ball and socket (b) pivot (c) gliding (d) hinge. 74. Which of the following stages in the life history of liver fluke infects the primary host? (a) metacercaria (b) miracidium (c) cercaria (d) redia. 75. Gizzard in an earthworm serves for (a) secreting slime (b) absorbing digested food (c) excretion (d) crushing food. 76. Number of cervical vertebrae in camel (a) same as that of whale (b) more as that of horse (c) less .than that of rabbit (d) more than that of rabbit. 77. Ringer's solution contains (a) iodine and salt (b) acetic acid and wax (c) sodium and potassium ions (d) water and acid fuschin. 78. The abdominal passage, which connects the abdominal cavity with the scrotal sac in mammals, is known as (a) spermatic canal (b) neurenteric canal (c) inguinal canal (d) Haversian canal. 79. The extra embryonic membranes of the mammalian embryo are derived from (a) trophoblast (b) inner cell mass (c) formative cell (d) follicle cells. 80. The theory believing that human population will outrun food supply is (a) Altrusian theory (b) theory of Marx (c) Malthusian theory (d) Eltons theory. 81. (a) (b) (c) (d) Helper T-cells suppress the total immune system directly attack and destroy antigens attract other T-cells stimulate antibody production by B- cells. 82. MOET (multiple ovulation embryo transfer) is a method of (a) (c) fish cultivation birth control (b) (d) hybridisation of cattle cloning of sheep. 8 3 . Which of the following pairs is characterised by swollen lips, thick-pigmented skin of hands and legs and irritability? (a) thiamine-beriberi (b) protein-kwashiorkor (c) nicotinamide-pellagra (d) iodine-goitre. 8 4 . Chloride shift is essential for transport of (a) C0 2 and 0 2 (b) N, (c) 0 2 co 2 . Cancer cells are more easily damaged by radiation than normal cells because they are (a) non-dividing (b) starved of mutatign (c) undergoing rapid division (d) different in structure. 86 in alkaptonuria (a) two genes for the trait are inherited (b) the pathway of phenylalanine metabolism is blocked (c) the urine turns black (d) all of these. 87. Breathing rate above normal is called (a) bradypnoea (b) orthopnoea (c) eupnea (d) tachypnoea. 88. Which of the following contain inner lining of ciliated epithelium? (a) trachea (b) uterus (c) ureter (d) vasa deferentia. 89. (a) (b) (c) (d) A high frequency sound will be detected by otoliths in the vestibule hair cells in the semicircular canals hair cells in the organ of Corti none of the above. 90. Obturator foramen is found in (a) rabbit's pectoral girdle (b) rabbit's pelvic girdle (c) frog's pelvic girdle (d) frog's pectoral girdle. 91. Amylolytic enzymes are produced from (a) salivary gland and liver (b) stomach and pancreas (c) salivary gland and pancreas (d) stomach and liver. 92. July 11 is (a) World environment day (c) World population day (b) World AIDS day (d) World education day. 93. Cydosporine is useful as/in (a) prophylactic for viruses (b) prophylactic for marasmus (c) immunosuppressant (d) treating allergic eczema. 94. (a) (b) (c) (d) Genetic drift is an orderly change in gene frequencies produces greatest fluctuations in large population is the random change in gene frequencies has nothing in common with inbreeding. 95 Praunitz and Kustner (PK) reaction is related to (a) IgM (b) IgD (c) IgA (d) IgE. 96. Patella is a kind of (a) cartilage bone (c) cartilage (b) (d) membrane bone sesamoid bone. 9? (a) (c) Movement of snake is helped by ribs (b) head tail (d) reduced ribs. (a) (c) Pleiotropic genes are those which have single phenotype (b) multiple phenotype multiple genotype (d) single genotype. 99. Hypophysectomy leads to (a) (b) (c) increased digestion regression of reproductive functions heart attack (d) death. 100. Present between the blood capillaries and the cell membrane is a fluid through which gases, nutrients and metabolic wastes are exchanged between the blood and cell. This fluid is (a) lymph (b) plasma (c) serum (d) none of these. Contd. on page no. 26 BIOLOGY TODAY | JUNE2323' MODEL TEST PAPER H2M SECTION - A 1. (a) (b) (c) (d) Blood of earthworm is red in colour, due to dissolved haemoglobin in corpuscles red in colour, due to dissolved haemoglobin in plasma blue in colour, due to dissolved haemocyanin in plasma blue in colour due to dissolved haemocyanin in corpuscles. 2. Grey crescent is present in (a) retina of cockroach (b) fertilised egg of frog (c) eye of frog (d) cloaca of frog. 3. The egg case of cockroach is secreted by (a) collateral gland (b) corpus cardiaca (c) prothoracic gland (d) corpus allata. 4. the (a) (b) (c) (d) Which one of the following is the correct statement about circulatory system of cockroach? it is closed type of circulatory system it takes place without participation of tissues colour of blood is blue due to dissolved haemocyanin it has 13 chambered heart and in each segment one pair of ostia are present. 5. (a) (b) (c) (d) Barr body in humans represent all the heterochromatin in female cells all heterochromatin in. male and female cells Y chromosome in somatic cells of male one of the two X chromosomes in somatic cells of females. 6. The attachment and development of embryo inside uterus is called (a) conception (b) implantation (c) gestation (d) reproduction. 7. Allergens are (a) non-infectious and increase secretions of IgE antibodies and histamines (b) infectious and increase secretion of IgM antibodies and histamines (c) non infectious and decrease secretion of IgG antibodies (d) infectious and increase secretion of IgE antibodies. (a) (b) (c) (d) Menstrual cycle starts when there is decrease in progesterone level increase in estrogen level FSH release release of oxytocin. BIOLOGY TODAY | JUNE 09 23' 9. (a) (b) (c) (d) In a normal ECG recording heart sound will occur on the P wave and at the end of QRS complex on the QRS complex and at the end of T wave at the end of P wave and at the end of QRS complex on the P wave and on the T wave. 10. (a) (b) (c) (d) The difference between blood and lymph is blood has RBC and WBC while lymph has no cells blood has RBC and WBC while lymph has only WBC blood has WBC while lymph has plasma and RBC blood has dissolve salts while lymph has large proteins. 11. Unidirectional transmission of a nerve impulse through nerve fibre is due to the fact that (a) nerve fibre has nodes of Ranvier (b) nerve fibre is insulated by a medullary sheath (c) neurotransmitters are released by dendrites and not by axon endings (d) neurotransmitters are released by the axon endings and not by dendrites. 12. (a) (b) (c) (d) Pseudostratified epithelium line urethra and oviduct trachea and respiratory tract urinary bladder ovary and pancreatic duct. 13. At high altitudes, RBCs of human blood will (a) increase in size (b) increase in number (c) no change in number (d) decrease in size. 14. Which of the following disease is not transmitted through contaminated water? (a) typhoid (b) cholera (c) diarrhoea (d) hepatitis B. 15. (a) (b) (c) (d) Carcinoma refers to malignant tumours of the connective tissue malignant tumours of the skin or mucous membrane benign tumours of the connective tissue none of the above. 16. Diphtheria is characterised by (a) difficult breathing (b) hydrophobia (c) amoebiasis (d) dehydration. 17. The eye defect in human beings called myopia is corrected by using (a) bifocal lens (b) concave lens (c) convex lens (d) coloured lens. 18. (a) (c) (d) Prostaglandins have no role in inflammatory response (b) allergic reactions blood clotting conduction of nerve impulse. 19. Identify from the following a hormone produced by the pituitary gland in both males and females but functional only in females (a) ADH (b) relaxin (c) prolactin (d) ACTH. 20. (a) (b) (c) (d) Probiotics are cancer inducing microbes food allergens live microbial food supplement drugs. 21. Cholecystokinin is a (a) enzyme (b) bile pigment (c) gastrointestinal hormone (d) vitamin. 22. (a) (c) (d) Coacervates belong to the category of cyanobacteria (b) protovirus molecular aggregates molecular aggregates surrounded by lipid membrane. 23. Improvement of human race by the application of genetic principles is called (a) euthenics (b) euphenics (c) eugenics (d) human heredity. 24. Which part of ovary in mammals acts as an endocrine gland after ovulation? (a) stroma (b) zona pelucida (c) mesovarium (d) Graafian follicle. 25. Immovable joints are called (a) amphiarthroses (b) synarthroses (c) condylar joints (d) diarthroses. 26. Winged pollen grains are found in (a) Cycas (b) Pinus (c) Cedrus (d) Dryopteris. 27. (a) (b) (c) (d) Cellular totipotency means synthesis of new cells formation of new species formation of new plants capability of a plant cell to form complete plant. 28. In mitochondria, ATP is synthesized at (a) F, particles (b) outer membrane (c) matrix (d) ribosomes 29. There is no use to obtain seedless fruit of (a) orange (b) watermelon (c) pomergranate . (d) mango. 30. Bead-like thickened portions of leptotene chromosomes are (a) puffs (b) chromomeres (c) centromere (d) genes. 31. Pink flowered progeny of red and white flowered parents of Antirrhinum majus is produced due to (a) dominance (b) epistasis (c) codominance (d) incomplete dominance. 32. Crossing over may result into (a), gene mutation (b) genomatic mutation (c) genetic recombination (d) none of these. 33. (a) (b) (c) (d) A dioecious plant has bisexual flowers bisexual and neuter flower either male or female flower both male and female flower. 34. Which one of the following is oil seed? (a)" marigold (b) sunflower (c) rose (d) Hibiscus. 35. Sieve tubes and companion cells occur in (a) xylem (b) cambium (c) meristem (d) phloem. 36. C0 2 acceptor of C4 plants is (a) PEP (b) PGA (c) RuBP (d) pyruvic acid 37. Fruit kept in refrigerator maintain their flavour and taste for longer period due to (a) nonavailability of oxygen (b) presence of excess C0 2 (c) presence of excess moisture (d) slowing down of respiration. In anther, meiosis occurs in (a) tapetal cells (b) pollen mother cells (c) endothelial cells (d) stomium cells. 39. Kanha National Park is famous for (a) rhinoceros (b) tiger (b) birds (d) crocodiles. 40. Which one is sedimentary cycle? (a) oxygen cycle (b) phosphorus cycle (c) carbon cycle (d) nitrogen cycle. Population where pre-reproductive animals occur in large number is (a) declining (b) growing (c) fluctuating (d) stable. BIOLOGY TODAY | JUNE 09 23' ^ 2 succinyl CoA (b) succinic acid —> fumaric acid (c) succinyl CoA succinic acid (d) fumaric acid —> malic acid Genetically engineered bacteria are being employed for production of (a) thyroxine (b) human insulin (c) Cortisol (d) epinephrine 14. Scientific name of sunflower is (a) Hibiscus rosa-sinensis (b) Solarium nigram (c) Oryza sativa (d) Helianthus annuus 15. By which of the following methods, new and better varieties of plants can be formed ? (a) selection (b) grafting (c) hybridization (d) hybridization followed by selection 16. Which one is product of aerobic respiration ? (a) malic acid (b) ethyl alcohol (c) lactic acid (d) pyruvic acid 5 The chemical nature of hormones secreted by a & 5 cells of pancreas is (a) glycolipid (b) glycoprotein (c) steroid (d) polypeptide 1, C0 2 acceptor in C3 cycle is (a) OAA (b) RuBP (c) The genetic material of Rabies virus is (a) double stranded RNA (b) single stranded RNA (c) double stranded DNA (d) single stranded DNA 19, (a) (b) (c) (d) 7. T-lymphocyte is produced in (b) spleen (a) bone marrow (d) thymus (0 pancreas 8 How many ATP molecules are obtained from fermentation of 1 molecule of glucose ? (a) 2 (b) 4 (c) 3 (d) 5 Number of nitrogenous bases in a codon is (a) 3 (b) 2 (c) 1 (d) 5 10. A character which is expressed in hybrid is called (a) dominant (b) recessive (c) co-dominant (d) epistatic In which stage of cell division chromosomes are most condensed ? (a) prophase (b) metaphase (c) anaphase (d) telophase 12, (a) (b) (c) (d) Which of the following is correct? haemophilic - Y chromosome Down's syndrome -'21st chromosome sickle cell anaemia - X chromosome Parkinson's disease - X and Y chromosome PEP (d) malic acid 18, Virus was discovered by whom ? (a) Stanley (b). Ivanowski (c) Herelle (d) Beijerinck Electron microscope is based on principle of electromagnetic theory resolution of glass lenses magnification of glass lenses refraction of light 20, Citric acid cycle is the alternate name of which of the following? (a) HMP shunt (b) glycolysis (c) TCA cycle (d) Calvin cycle 2 Vascular tissue in higher plants develop from which of the following? (a) procambium (b) protoderm (c) periblem (d) cortex 22. Which element is the cause of etai etai disease? (a) Hg (b) Pb (c) Cd (d) As . 23. Chromosomes can be stained with one of the following chemicals? (a) acetocarmine (b) safranine (c) light green (d) eosin 24. Which one of the following is the American poultry breed? (a) Australorp (c) Minorca (c) Aseel (d) Rhode Island Red By : Pathfinder Educational Centre, Behala. Ph.: 24551840 BIOLOGY TODAY|APRIL0909 23' Which part of the human brain is largest? (a) cerebellum (b) thalamus (c) cerebrum (d) medulla When the other floral parts are arranged at the base of the gynoecium, the flower is called (a) hypogynous flower (b) perigynous flower (c) epigynous flower (d) agynous flower (a) (b) '(c) (d) In a CAM plant the concentration of organic acid increases during the day decreases or increases during the day increases during night decreases during any time Protein coat of virus is known as (a) capsid (b) virion (c) virioid (d) bacterial wall Net yield of aerobic respiration during Krebs' cycle per glucose molecule is (a) 2 ATP molecules (b) 8 ATP molecules (c) 36 ATP molecules (c) 38 ATP molecules Feedback inhibition of enzymes is affected by which of the following ? (a) enzyme (b) substrate (c) end products (d) intermediate end products The discovery of gibberellins is related with one of the following (a) blast disease of rice (b) rust disease of wheat (c) 'bakanae'disease of rice (d) early blight disease of potato Ornithophily refers to the pollination by which of the following? (a) insects (b) birds (c) snails (d) air .Which of the following is an example of man-made ecosystem? (a) herbarium (b) aquarium (c) tissue culture (d) forest Respiratory enzymes are present in which of the following organelle? (a) peroxysome (b) chloroplast (c) mitochondrion (d) lysosome (c) median eminence (d) pars distalis 39, The duration of cardiac cycle is (a) 0.8 sec (b) 0.8 jo. sec (c) 0.08 sec (c) 0.008 sec The intensity levels of whispering noise is (a) 10 - 15 dB (b) 2 0 - 4 0 dB (c) 4 5 - 50 dB (d) 5 0 - 55 dB 41 The Wildlife Protection Act was introduced in (a) 1974 (b) 1981 (c) 1986 (d) 1991 In honey the percentage of Maltose and other sugar is (a) 9.2 (b) 8.81 (d) 10.5 (d) 11.2 43. Identify the correct type of food chain dead animal blow fly maggots —> common frog - > snake (a) grazing food chain (b) detrital food chain (c) decomposer food chain (c) predator food chain 44. Which is not applicable to the biological species concept? (a) hybridization (b) natural population (c) reproductive isolation (d) gene pool 45. DNA sequences that code for protein are known as (a) introns (b) exons (c) control regions (d) intervening sequences 4s Which one of the following is a systemic insecticide ? (a) malathion (b) parathion (c) endrin (d) furadan 47. The resolving power of a compound microscope will increase with (a) decrease in wavelength of light and increase in numerical aperture (b) increase in wavelength of light and decrease in numerical aperture (c) increase in both wavelength of light and numerical aperture (d) decrease in both wavelength of light and numerical aperture 48. Osteomalacia is a disease caused by the deficiency of (a) calciferol (b) retinol (c) tocopherol (d) phylloquinone Which one of the following leucocytes transforms into macrophages ? (a) eosinophil (b) basophil (c) monocyte (d) lymphocyte Which is the correct sequence of arrangement of types of WBC in decreasing order in terms of number per mm3 of human blood ? (a) eosinophils > basophils > neutrophils (b) basophils > eosinophils > neutrophils (c) neutrophils > eosinophils >basophils (d) eosinophils > neutrophils > basophils Mention the "Incubation Period" of P. vivax (a) 1 0 - 1 4 days (b) 2 0 - 2 5 days (c) 30 days (d) 45 days 50. Cells in G0 phase of cell cycle (a) exit cell cycle (b) enter cell cycle (c) suspend cell cycle (d) terminate cell cycle The specific region of hypothalamus, responsible for physiological sweat secretion, is (a) para-ventricular nucleus (b) supra-optic nucleus 51. Choose the correct non-protein amino add (a) hydroxyproline (b) hydroxylysine (c) cystine (d) y amino butyric acid Pellagra is caused due to deficiency of the vitamin (a) thiamin (b) niacin (c) pyridoxin (d) biotin BIOLOGY TODAY | JUNE 09 23' Seedless banana is (a) parthenocarpic fruit (c) drupe fruit (b) multiple fruit (d) true fruit The major site of protein breakdown to form free amino acids, is in the (a) kidney (b) spleen (c) liver (d) bone-marrow Collagen is a (a) phosphoprotein (c) derived protein (b) globulin (d) scleroprotein The "repeating unit" of glycogen is (a) fructose (b) mannose (c) glucose (d) galactose Graham's law is correlated with (a) diffusion (b) osmoregulation (c) osmosis (d) adsorption Which of the following does not act as a neurotransmitter? (a) acetyl-choline (b) glutamic acid (c) epinephrine (d) tyrosine The generation of excitation-contraction coupling involves all the following events except (a) generation of end-plate potential (b) release of calcium from troponin (c) formation of cross-linkages between actin and myosin (d) hydrolysis of ATP to ADP In AIDS, HIV kills (a) antibody molecule (c) bone marrow cells (b) T Helper cell (d) T Cytotoxic cell Generally artificial pacemaker consists of one battery made up of (a) nickel (b) dry cadmium (c) photo sensitive material (d) lithium 6 Goitre can occur as a consequence of all the following except (a) iodine deficiency (b) pituitary adenoma (c) Grave's disease (d) excessive intake of exogenous thyroxine Pernicious anaemia results due to deficiency of (a) vitB, (b) vitA (c) vit B12 (d) iron (c) point mutation (d) frameshift mutation Cellular totipotency was first demonstrated by (a) F.C. Steward (b) Robert Hooke (c) T. Schwann (d) A.V. Leeuwenhoek Molecular scissors which cut DNA at specific site is (a) pectinase (b) polymerase (c) restriction endonuclease (c) ligase 6£ S02 pollution is indicated by (a) Desmodium (grasses) (b) Sphagnum (mosses) (c) Usnea (lichens) (d) Cucurb/fa (climbers) 69. Sporopollenin is chemically (a) homopolysaccharide (b) fatty substance (c) protein (d) heteropolysaccharide 70. During replication of DNA, Okazaki fragments are formed in the direction of: (a) 3' - > 5' (b) 5' 3' (c) 5' - > 5' (d) 3' - » 3' 71. The chemical nature of chromatin is (a) nucleic acids (b) nucleic acids & histone proteins (c) nucleic acids, histone & non histone proteins (d) nucleic acids & non- histone proteins .7; Choose the minor carp from the following (a) Cyprinus carpio (b) Labeo calbasu (c) Labeobata (d) Ctenopharyngodon idella The scientific name of Asian tiger mosquito (a) Aedesaegypti (b) Aedes albopictus (c) Aedes taeniorhychus (d) Aedes albolineatus 74. The size of filtration slits of glomerulus (a) 10 nm (b) 15nm (c) 20 nm (d) 25 nm 75. Ornithorhynchus is an example of (a) dinosaur (b) monotreme mammal (c) marsupial mammal (d) eutherian mammal Scirpophaga incertulus is an example of (a) monophagus pest (b) diphagus pest (c) oligophagus pest (d) polyphagus pest Which of the following substances yield less than 4 Kcal/mol when its phosphate bond is hydrolysed? (a) creatine phosphate (b) ADP (c) glucose-6-phosphate (d) ATP 77. Which one of the following ancestors of man first time showed bipedal movement? (a) Australopithecus (b) Cro-magnon (c) Java apeman (d) Peking man The genetic deficiency of ADH-receptor leads to (a) diabetes mellitus (b) glycosuria (c) diabetes insipidus (d) nephrogenic diabetes 71 (a) (c) (d) Out of A-T, G-C pairing, bases of DNA may exist in alternate valency state owing to arrangement called (a) tautomerisational mutation (b) analogue substitution Trophic levels in ecosystem is formed by only bacteria (b) only plants only herbivorous organisms linked in food chain The life span of honey bee drone is (a) 3 - 4 m o n t h s (b) 1 - 2 months (c) 6 - 7 months (d) 1 0 - 1 2 months BIOLOGY TODAY|APRIL0909 23' Name of a gaseous plant hormone is (a) IAA (b) gibberellin (c) ethylene (d) abscisic acid DESCRIPTIVE TYPE QUESTIONS (Full Marks 20. Each question carries 2 Marks) ; (a) Auxin , (b) Gibberellins, (c) Cytokinin, (d) Gibberellins : In Krebs' cycle, citrate is converted to isocitrate with release ; of water in the presence of enzyme aconitase. Cis aconitate is ; the intermediate product formed. Name one each specific plant hormone which perform the ; 3; Potato - Solanum tuberosum following exclusive physiological roles: Tomato - Lycopersicon esculentum (a) maintenance of apical dominance of shoots (b) internodal elongation I 4. Insects of a given species that live together in organised (c) enhancement of ceil division ; groups or colonies are known as social insects. Honey bees are (d) change of sex in flowers ; highly colonial, social and polymorphic insects. Honey bee shows Mention the function of the enzyme aconitase in Krebs : division of labour. Three types of individuals (castes) are found cycle. | in colony of honey bees, which are differentiated according to Write down the scientific names of potato and tomato j structure, function (reproduction, feeding, guarding, etc) and plants. ; behaviour. ; (i) Queen is a fertile female which lays eggs. Why honey bee is regarded as social insect? ; (ii) Drones are males which mate with queen. What are biopesticides? Give two examples. : (iii) Workers are sterile females and perform various duties of What is biosphere reserve? State the main functions of j the colony. biosphere reserve. | 5. Biopesticides are those biological agents that are used What are stem cells? ; for control of weeds, insects and pathogens. They are of two How ADH increases blood pressure? : types: Name two end-product of ^-oxidation of fatty acid. : 10. Mention the transformation event of immature sperm to : matured spematozoa. State the specific location of Sertoli cells j ; within testis. - Bioherbicides which are chemicals that are used for inhibiting the growth of plants in unwanted places, - Bioinsecticides which are biological agents used to control harmful insects. : i ; ; ; The micro-organisms used as biopesticides are viruses, bacteria, protozoa, fungi and mites. Examples are : Bacillus thuringiensis is (bacterium) can control cabbage looper (Trichoplausiani). Baculovirus heliothis (virus) can control cotton bollworm (Heliothis). j : I : ; 6. Biosphere reserves are multipurpose protected areas which are meant for preserving genetic diversity in representative ecosystems of various natural biomes and unique biological communities by protecting wild population, traditional life style of tribals and domesticated plant/ animal genetic resources. ; : ; | ; j ; i : ; The main functions of biosphere reserve are: (i) Restoration - Biosphere reserves help in restoration of degraded ecosystems and habitats. (ii) Conservation - They are means of conserving genetic resources, species, ecosystems and landscapes without uprooting the local people. (iii) Development - They ensure culturally, socially and ecologically sustainable economic development. (iv) Monitoring-There is a regular monitoring of development and conservation progress. ANSWER KEYS (c) 2. (d) 3. (a) (b) 5. (d) 6. (b) (a) (a) [Hints: Produced 4 ATP, used 2 ATP, gain 4 - 2 = 2ATP] (a) 10. (a) 11. (b) 12. (b) 13. (b) 14. (d) (d) , (a) 17. (b) 18. (b) (a) 20. (c) (a) 22. (c) (a) 24. '(d) 25 (c) 26. (a) 2/ (c) 28. (a) 29. (a) 30. (c) 31. (c) 32. (b) (b) 34. (c) 35. (b) .36. (c) 37. (a) (None of the options is correct), correct answer is preoptic nucleus. (a) 40. (b) 41. (None of the options is correct), correct answer is 1972. 4 7 . (a) 42. (b) 43. (b) 4 4 . (a) 4 5 . (b) 46. (d) 53, (c) 48. (a) 49. (c) 50. (c) 51. (d) 52. (a) 59, (b) 54. (d) 55. (c) 56, (a) 57. (d) 58. (b) 65. (a) 60. (d) 61. (d) 62. (c) 63. (c) 64. (c) 66. (a) 67. (c) 68. ( 0 69. (b) 70. (b) 71. (c) (c) 73. (b) 74, (d) 75. (b) 76. (a) 77. (a) 78. (d) .79. (b) [Hint: Life span 7-9 weeks correctly] 80. (c) BIOLOGY TODAY | JUNE 09 23' (v) Education and research - Each biosphere reserve supports education of information about research, restoration, conservation and development aspects at the national and global levels. Stem cells are undifferentiated cells that are able to renew themselves and produce all the specialized cells within an organ. Stem cells are distinguished from other cell types by two important characteristics: (i) They are unspecialised cells capable of renewing themselves through cell division, some times even after long period of inactivity. (ii) Under certain physiological or exprimental conditions they can be induced to become tissue or organ specific cells with special functions. E.g., In gut and bone marrow, stem ceils regularly divide to repair and replace worn out tissue. In other organs such as pancreas and heart, stem cells only divide under special conditions. Antidiuretic hormone (ADH) or vasopressin or pitressin is ' secreted from the posterior lobe of pituitary gland.This hormone has two main functions. (i) Antidiuretic effect: It increaes the reabsorption of water from kidney. (ii) Pressor effect: Involuntary muscles in the walls of intestine, gall bladder, urinary bladder and blood vessels are stimulated to contract by ADH. ADH raises the blood pressure by contracting the walls of the blood vessels, hence its name is vasopressin. At the end of p-oxidation of fatty acid 2 molecules of acetyl • coenzymes and thioester of the remaining fatty acid chain are produced. Spermiogenesis is the process of differentiation of immature sperm (spermatid) to matured spermatozoa. The different changes which occur during spermiogenesis are : (i) Formation of acrosome by Golgi apparatus (ii) Elongation and condensation of nucleus (iii) Formation of axial filament and distal centriole (iv) Development of mitochondrial spiral around upper part of axial filament (v) Differentiation of a limiting membrane and formation of flagellum After spermiogenesis sperm heads become embedded in the Sertoli cells and are finally released from the seminiferous tubule by the process called spermiation. Sertoli cells are present in between the germinal epithelial cells of the seminiferous tubules. Sertoli cells provide nourishment to developing spermatozoa, hence called nurse cells. •• V i i t t C l FOR PEAK PERFORMANCE rapid chemistry PIHYS1CS | CHEMISTRY | BIOLOGY Send DD/MO in favour of M T G Books. Available at all leading bookshops throughout the country. M T G BOOKS • BOOKS • 503, Taj Apt., king Road, Near Safdarjung Hospital, New Delhi - 1 1 0 029 Tel.: (011) 46686000 BIOLOGY TODAY | JUNE 09 23' SAMPLE QUESTIONS rn II (2) IR-36 is a variety of rice, developed at IARI by crossing an Indian rice species with 13 exotic species of rice (3) IR-8 is a variety of rice, imported from IRRI, Philippines, to be introduced in India (4) Developed from a Mexican variety of basmati rice The scientific names of species is based on principles and criteria provided by (1) ICBN for nomenclature of bacteria (2) ICZN for nomenclature of animals (3) ICNV for nomenclature of plants (4) ICNCP for nomenclature of cultivated crop plants (1) (2) (3) (4) "Historia Generalis Planatarum" is A book written by John Ray on Taxonomy Describes about 18000 species in 3 volumes A periodical magazine on species concept A journal published by IUCN (1) (2) (3) (4) Viroids differ from viruses in being Naked DNA molecules Naked RNA molecules only Naked DNA packaged with viral genome Pathogenic on plants only India is (1) One of the 12 origin centres of crop plants having 8.1% of global biodiversity (2) Having Western Ghats as one of the hot spot region (3) Having 45000 plants and 90000 animals species known so far (4) Origin centre of maize whereas USA is secondary home of maize A phase contrast microscope is used (1) For increasing resolving power (2) To study cells and their components in a living state using a phase difference in the light rays (3) To localize cell structures stained with fluorochromes (4) On the principle of differential pattern of refractive indices of cell components What is correct? (1) Golden rice is a variety rich in-beta-carotene i.e., vitamin A Human genome project was completed in MAY, 2006, the associated features are (1) 2968 genes on chromosome no. 1 (2) 231 genes on Y chromosome (3) Total genome size of 3.1 x106 kilo base pairs (4) Y chromosome was sequenced in 1999. Find out correct definitions from following terms. (1) Auxotroph - mutants not capable to grow in minimal medium (2) Osmotrophs - parental type capable to grow in minimal medium. (3) Biotrophs - parasitic fungi (4) Prototrophs - not capable to grow in minimal medium. 9. Which of following invention/s is/are selected for Noble Prize? (1) Chemiosmotic theory (2) One gene - one enzyme theory (3) Biological species concept (4) Chromosomal theory of inheritance Which of the following features are associated with endosymbiontic nature? (1) Separate genomes of mitochondria and chloroplast in an eukaryotic cell (2) Separate genomes of mitochondria and mesosomes in a prokaryotic cell (3) Semiautonomous nature of mitochondria and plastids in an eukaryotic cell (4) Semiautonomous nature of mitochondria and chloroplast in a prokaryotic cell Transgenics are commercially very important e.g., (1) Gambusia is a transgenic and larvicidal fish (2) Flavr Savr tomato is a transgenic with increased durability Prepared by : Dr. Shah Nawaz Khan, Department of Botany, SKD NSCI, Lucknow BIOLOGY TODAY | JUNE2323' (3) Bt cotton is transgenic with insecticidal nature (4) E. coli is made transgenic for synthesis of TPA (4) Corolla is divided into two similar halves only in one particular vertical plane, is actinomorphic. Biophysics is very important for providing technologies in studies of biological concepts, e.g., (1) CCMB, Hyderabad is centre of DNA fingerprinting in India (2) Dry weight of DNA, RNA, and proteins can be determined by atomic force microscope (3) To introduce foreign gene in a plant, Agrobacterim is used (4) Boiled water is not considered sterilized due to presence of nematodes 17. Which one of the following associated with a chemical as 0 2 absorber? (1) Frankia - a symbiotic N2 fixing bacterium in the roots of nonleguminous plants . (2) Rhizobium - a symbiotic N2 fixing bacterium in the roots of leguminous plants (3) Methanogens - anaerobic archaebacteria for production of biogas (4) Mycoplasma- anaerobic microbes to protect pigment bacteriorhodopsin. Which of the following statements are true for epithelial tissue? (1) It has no blood vessels (2) It has least amount of matrix (3) It has maximum power of regeneration (4) It always protects the underlying tissue against friction. 18. Penicillin and lysozyme both are antibacterial, which of the following statements are correct? (1) Penicillin can digest bacterial cell wall (2) Lysozyme can digest bacterial cell wall (3) Penicillin and lysozyme, both can inhibit cross linking of bacterial cell wall (4) Penicillin can inhibit cross linking of bacterial cell wall •14. What are correct about Pheretima posthumal (1) It is studied by Dr. K.N. Bahl; metamerically segmented; having perichaetine arrangement of setae and mouth is located in first body segment that is prostomium. (2) Male pores located ventrolateral^ in 18th body segment, female pore midventrally in the 14th segment and no nephridia in first 2 segments (3) Genital papilla located in 17th and 19th segment and chloragogen cell found plastered on entire peritoneum of gut (4) No septa in first 4 segments and in 9/10, oblique septa in 5/6,6/7, 7/8, 8/9 and 10/11. First 9 septa are non porous and the 9th septum is located in between 13th and 14th segment. 1 Which of the followings are not true about earthworm? (1) Dorsal, solid, double nerve cord & brain ring is located in 3rd and 4th segment (2) The blood is red due to iron containing haemoerythrin found in blood cells (3) Blood glands are located in 4, 5, & 6 segments, these are functionally similar to bone marrow of other animals (4) Choragogen cells are functionally similar to liver of other animals. These are found plastered on entire visceral peritoneum of stomach and intestine. 16. (1) (2) (3) In a flower Calyx, corolla are accessory organs Androecium and gynoecium are reproductive organs Corolla, calyx, gynoecium and Androecium are arranged successively Find out the correct statements. (1) Cell plate formation takes place by centrifugal arrangement of phragmoplast (2) Plane of cell wall formation is determined by microtubules (3) Phragmoplast formation starts during anaphase of cell division (4) Cell plate formation takes place by centrifugal arrangement of microtubules 20. Study the given DNA fragment: 5'GCGAATTAAAGAATTCTGAATTCGGGA3' 3'CGCTTAATTTCTTAAGACTTAAGCCCT5' Now answer in respect of Eco Rl. wtes- • Human Biology 700+ MCQ's from AIIMS, CBSE-PMT, AFMC, Manipal & Other National / State PMT's 2000 + High Yield Fact's HUMAN BIOLOGY m ^JP 400 + Points to Remember Available at all leading bookshops all over the country MTG BOOKS 503, Taj Apt.. Ring Road. New Delhi- 110 029 Tel.: 26191601,26194317 . _;: B I O L O G Y TODAY | JUNE2323' j (1) Will give blunt ends (2) Two restriction sites on this segment 25. Four biodiversity rich habitats- P, Q, R & S of different geographical area are studied as: P - 3 species of bryophytes, 4 species of insects, 5 species of reptiles, 2 species of angiosperms Q - 6 species of bryophytes, 4 species of insects, 2 species of reptiles, 2 species of angiosperms R - 2 species of bryophytes, 2 species of insects, 2 species of reptiles, 2 species of angiosperms, 2 species of birds, 4 species of amphibians 5 - 3 species of insects, 3 species of reptiles, 2 species of birds, 6 species of mammals. Select the correct statements. (1) Habitat R and habitat S can be declared as 'hot spot' (2) The species richness is maximum in habitat Q (3) Three restriction sites on this segment (4) Will give sticky ends 21 (1) (2) (3) (4) The bark of tree comprises All the tissues outside the vascular cambium Primary as well as secondary tissues Only cork Cork and secondary cortex 22. The process in which DNA of one strain of bacterium is transferred into another strain of bacterium through (1) Viruses is called transduction (2) Medium is called transformation (3) Direct contact is called conjugation (4) Another bacteria is called reproduction 23. (1) (3) (4) Which pairs are correctly matched? C 3 - maize (2)' C4 - kranz anatomy Calvin cycle - glycolate Hatch and Slack pathway - oxaloacetic acid 24. Puccinia infection occurs through (1) Teleutospores in wheat (2) Uredospores in wheat (3) Pycniospores in barberry (4) Aeciospores in wheat (3) The species richness is maximum in habitat R (4) Habitat S and habitat Q can be declared as 'hot spot' : ANSWERS • (c) : 1! 6- (a) | 11. (a) : 16. (b) i 21. (b) 2. 7. 12. 17. 22. (b) (a) (a) (b) (a) Wl-fcG- 3. (c) 8. (d) 13. (a) 18. (c) 23. (c) 4. (a) 9. (b) 14. (c) 19. (a) 24. (c) 5. 10. 15. 20. (c) (d) (b) (c) 25. (b) Wtfc© Reaction Mechanisms in ORGANIC CHEMISTRY Reaction Mechanisms In Q86ANIC CHEMISTRY Organic Chemistry covers major portion of a Chemistry Paper of any competitive exam be it medical or engineering. Organic Chemistry is based on different reactions. In order to solve the problems of Organic Chemistry one should have good command on the concepts, reactions and their mechanisms. M T G is releasing this book to empower students with each and every skill required to solve problems in Organic Chemistry. * The book starts with basic knowledge of various types of reactions: electrophilic and nucleophilic substitutions, eliminations etc. «> The book deals with important named reactions, rearrangement and their mechanisms. • This book would be useful and effective in helping the students of chemistry to develop an insight into the mechanistic aspects •• • r• o• of Organic Chemistry as a whole. Available at all leading bookshops all over India BIOLOGY TODAY | JUNE2323' BOOKS MTG BOOKS 503, Taj Apts., Ring Road New Delhi-29 Tel : (011) 26191599 e-mail : info@mtg.in. website : www.mtg.in Contd. from page no. 17 18. Fill in the blanks by using following words given in bracket. CNG. LPG, butane, cotton boll worm, corn borer, citiric acid, acetic acid, DNA sequences, nucleotide sequence, protein. Agrobacterium, restriction endonuclease, aphid, cloning Bacillus, methane, bacteria.] (a) Aspergillus niger is used to produce (b) Biofertiizers are obtained from - species and biopesticides are obtained from - species. (c) are the enzymes used to cut the DNA from specific site. (d) The process of making identical copies of DNA segments is known as (e) The protein encoded by the genes Cry-IAc and Cry-llAb control and Cry-lAb controls and control (f) Bio gas mainly contains and used for cooking. 19. (a) Draw the floral diagram and write floral formula of mustard. (b) Write down three properties of genetic code (c) Write one difference between El-nino and La-nino effect 20, How do the following help in transfer, storage and expression of genetic information ? (a) Nucleolus (b) Ribosome (c) Centriole (d) Centromere (e) Chromatin . ANSWERS 1. (i) (a) — v, vii (b)-iii, ix, x (c) - i, iv (d) - viii (ii) Typhlosole - Annelida, Radulla -Mollusca, Choanocytes - Porifera . (a) Banyan tree (Ficus bengalensis) shows hypanthodium type of inflorescence formed by the condensation of main axis into a cup or flask-shaped fleshy receptacle with a small opening which is guarded by scales.The cavity of hypanthodium bears three kinds of flowers - male flowers, female flowers and neuter flowers. All the flowers arranged inside the cavity in cymose groups, so some person say, there are no flowers in banyan tree. (b) Hot spots are areas of rich biodiversity which have been declared sensitive due to direct or indirect interference of human activities. The two main characteristics for determining a hot spot are : - number of endemic species, - degree of threat in terms of habitat loss. Two hot spots of India are Western Ghats/Sri Lanka and Indo-Burma regions (c) Parasites are any living thing that lives in (endoparasite) or on (ectoparasite) another living organism e.g., Cuscuta reflexa. Pathogens are microorganisms (such as bacterium) that parasitize any living organism (animal, plant or a human) and produce a disease e.g., Puccinia graminis. (d) Phyllodes are flat, green-coloured leaf like modifications of petioles or rachis. The leaflets or lamina of the leaf are highly reduced or caducous. The phyllodes perform photosynthesis and other functions of leaf e.g., Acacia. In some xerophytes, the function of leaves (mainly photosynthesis) is taken over by the stems which get modified into flattened or cylindrical structures called phylloclades e.g., Opuntia. (e) Yeast in unicellular, eukaryotic and simplest fungi. It contains well developed cellular organelles like mitochondria, ribosomes etc. and nucleus. Nucleus is surrounded by nuclear membrane and contain nucleolus, chromatin threads and nucleoplasm. 3. (i) Correct (ii) Incorrect Correct-Conduction of impulses along the axon membrane takes place due to depolarization and repolarization waves. (iv) Incorrect Correct-common heptic duct is formed by right hepatic duct and left hepatic duct. (v) Incorrect Correct - Amniotic fluid diagnosis is misused in determination of sex of child. 4. (a) Gene mutation that involve the substitution, deletion or insertion of a single nitrogenous base is called point mutations. (b) Transcription occurs in the nucleus during G1 and G2 phases of cell cycle. DNA has promoter and terminator sites. Transcription starts at the promoter site and stops at the terminator site. The bases from the promoter to the terminator sites form a transcription unit. (c) The genetic material present inside the reproductive cells or germ ceils of crops and its related species is called germplasm. (d) Plant breeding programme designed to increase the vitamin, minerals, higher protein and healthier fat content in crop yields is called biofortification. (e) Adaptation means adjustment of an organisms by having certain features that enhance its capacity to withstand a particular environment. It may be genotypic or phenotypic. 5. (a) - (vii), b - (ii), (iii), c - (vi), d - (iv), e - (xi) 6. (a) In garden pea tall plants are hybrid and when they crossed with each other they produce 25% dwarf plants. (b) This statement is correct. (c) Enzymes similar in structure and activity are called isoenzyme. (d) Nitrogenous waste product in human is urea, while uric acid is in cockroach BIOLOGY TODAY |APRIL0909 23' (e) At the time of splicing process introns are removed and exons join together. (a) Pond, phytoplankton (b) Secondary, lateral (c) Proteins, xylem, (d) Castor, geitonogamy, (e) Gliocladium, Anabaena (a) Correct sequence is A-C-B. (b) (1) is acrosome of sperm. Acrosome contains proteolytic and lysosomal enzymes, e.g., hyalouronidase, acrosin, corona penetrating enzyme which on acrosomal reaction are released on the surface of egg. These enzymes dissolve egg membrane and aid in sperm binding and penetration through follicular cells and zona pellucida. (c) (2) is tail of sperm. It helps in swimming of sperm and thus, facilitates motility to sperm. (d) (3) is the middle piece of sperm containing mitochondria. Mitochondrial activity helps in providing energy for the motility of tail. (e) In human female, fertilization takes place in the ampullary -isthmic junction of the fallopian tube. (f) Implantation takes place in the blastocyst stage of zygote. (i) The given diagram is of Penicillium or conidiophores of Penicillium bearing conidia. (a) - metulla (b) - sterigmata (ii) The given diagram is of V.S of sporangium of Pteridium acquilinum (c)-annulus (d)-stomium (iii) The given diagram is of colony of Volvox bearing three daughter coenobia. (e) - parent coenobium (f) - daughter coenobia (iv) The given diagram is of T.S of free central placentation. E.g., - Priomrose, Dianthus (v) The given diagram is of HIV-virus (Human immuno deficiency virus). (g) - RNA (genetic material) (h) - Reverse transcriptase enzyme HIV spreads from one person to another by means of: - Unprotected sexual intercourse with an infected partner and - Use of contaminated needles and syringes to inject drugs or vaccines. (i) Tropical rain forest biome occupies low-lying areas near the equator with heavy rainfall. This biome covers about 1/12th of the earth's surface but has over half of the world's flora and fauna. The tropical rain forests are very thick and show maximum biodiversity because : - The climate is warm and moist, and there are almost no seasonal variations. - The rainfall is high and uniform, there being no dry per ods. - The sunlight is strong. • (ii) IUCN - International Union of Conservation of Nature and Natural Resources. BIOLOGY TODAY | JUNE 09 23' (iii) Sacred grooves are the sacred forest patches around places of worship. These are held in high esteem by tribal communities/state or central government. Such sacred grooves are found in several regions in India such as Khasi and Jaintia hills of Meghalaya, Aravalli hills of Rajasthan, Chanda and Bustar areas of Madhya Pradesh. (iv) United Nations conference on Environment and Development was held in Rio-de-Janerio, Brazil in 1992. It is popularly known as Earth Summit. (a) (i) Bilateral, (ii) Vivipary, (iii) Ovipary, (iv) Radial symmetry (i) Pila - it belongs to phylum mollusca Shark - it contains two chambered heart Duck billed platypus - it is a breast feeder (Prototherian mammal). Sea anemone - it has tissue level of organisation. (b) (ii) (iii) (iv) 12. a - v, xii, b - ii, b - x v , xvi, d - x , e - iv vii 13. a - vii, b - ix, xiv, c - v, xiii, d - ii, iii, xi, e - vi, x 14. (a) It is a tranverse section of cochlea and is located in coiled part of bony labyrinth which floats in a bony cavity containing perilymph. (b) Scala media. The scala media is filled with fluid called endolymph. (c) 4 - Basilar membrane 5 - Organ of corti 6 - Tectorial membrane After reaching oval window, the sound waves causes vibration of endolymph fluid of the cochlear duct that causes the basilar membrane at the base of the cochlea to vibrate. These movements of basilar membrane bend the hair cells of organ of Corti pressing them against tectorial membrane. Thus, the hair cells are excited whenever the basilar membrane vibrates. As a result, the impulses are generated from the cochlear nerves that synapse with the bases of the hair cells. These impulses are transmitted by afferent neurons via auditory nerve to auditory cortex of the brain (temporal lobe) where impulses are analysed and sound is recognised. 15. Examples Placentation Inflorescence Fruit (a) Poinsettia Axile Cyathium Regma (b) Merigold Basal Capitulum Cypsela (c) Onion Axile Racemose/ Umbel Capsule (d) Brinjal Axile Cymose Berry (e) Radish Parietal Raceme/ Racemose Lomentum Siliqua (a) S)^ndrome Genetic basis Feature (i) Down's syndrome Non- disjunction of Stubby hands 21 chromosome dur- with a simian ing meiosis, causing line in the palm 47 chromosomes (Trisomy of 21st chromosome) insted of 46 (ii) Turner's syndrome Absence of one sex chromosome (Monosomy of X-chromosome, 2n-1) resulting into karyotype of 44 + XO • Female with degenerated ovaries and rudimentary sexual charact-eristics (iii) Klinefelter's Trisomy of sex (X) Males develop chromosome result- female syndrome charaing into a karyotype cteristics such as of 44 + XXY feminine pitched voice and enlarged breasts (gynaecomastia) (b) Convergent evolution is the development of superficially similar structures in unrelated organisms, usually because the organisms live in the same kind of enviroment. Analogy is based on convergent evolution. Penguin and dolphins live in similar habitat, that has resulted in selection of similar adaptive features in these two distantly related groups of organisms (analogy). Flippers of penguin and dolphin are analogous organs. (c) The statement incorrect. Ramapithecus was more man like, while Dryoisithecus was more ape like. (a) (b) (c) (d) (e) - tropical, Fig extinct, north, eastern smut, Ustilago Staphylococcus, Flemming Selaglnella, Pinus (a) citric acid, (b) bacteria, Bacillus, (c) restriction endonudease, (d) cloning, (e) cotton boll worm, corn borer, (f) methane (a) [ • (b) The genetic code of DNA r=; certain weli es:a: r - ? : fundamental characteristics. Thes; r e given belov. - Triplet nature : The genetic code is a triplet code. Three adjacent bases, termed a codon, specify one amino acid. - Non overlapping: The adjacent condons do not overlap, they do not share any base. - No punctuation : The genetic code is commaless. There are no punctuation marks between the coding triplets. (c) EL -nino is an abnormal warming of surface ocean waters in the eastern tropical pacific ocean while La-nino is the cooling effect of surface ocean waters in the western pacific ocean. (a) Nucleolus is dense, rounded dark-staining, granular organelle without a limiting membrane. It synthesizes and stores RNA. It also receives ribosomal proteins from the cytoplasm for storage. (b) Ribosomes provides pace or site for the synthesis of proteins in the cell. Ribosomes also furnish, enzymes and factors needed for the formation of polypeptides. (c) Centrioles help to organize spindle fibres and astral rays during cell division. (d) A chromosome consists of two identical halves, the chromatids held together at one point, the centromere. It helps in division of chromatids and attachment of spindle fibre during cell division. (e) Chromatins are coloured fibres found in nondividing nucleus. It forms chromosomes during cell division and stores all genetic information. •• of your Favourite M a g a z i n e s V o l u m e s of t h e f o l l o w i n g y e a r s are available : Mathematics Today : 2008,2007,2006 Chemistry Today : 2008,2007,2006 Physics For You : 2008,2007,2006 Biology Today : 2008,2007,2006,2005 P r i c e of e a c h v o l u m e : ' 7C R s . 2 2 5 for 2 0 0 8 v o l u m e A d d R s . 2 5 (for each volume) for p o s t a r e . Floral Diagram Floral Formula : © i K2+2 C4A2 + 4G(2) How to order: Send money by demand draft/money order. Demand Draft should be drawn in favour of MTG Learning Media (P) Ltd. Mention the volume you require along with your name and address. Mail your order to: Circulation Manager, MTG Learning Media (P) Ltd., 406, Taj Aptt., Ring Road, Near Safdarjung Hospital, New Delhi - 29. Tel.:46686000 e-mail: info@mtg.in BIOLOGY TODAY | JUNE 09 23' SOLVED PAPER 2 0 0 9 JEE Spirulina is the rich source of (a) protein (b) vitamins (c) minerals (d) all of these. The shape of chromosome is clearly visible at (a) prophase (b) anaphase (c) metaphase (d) telophase. Tunica - corpus theory is associated with (a) root apex (b) leaf primordium (c) shoot apex (d) both (a) and (c). Pneumatophore are characteristic of (a) mesophytes (b) halophytes (c) sciophytes (d) helophytes. The water of green coconut is (a) liquid endosperm (b) seed (c) mesocarp (d) endocarp. 6, Which of the following algae have the ability to fix atmosphere N2? (a) Vaucheria (b) Ectocarpus (c) Fucus (d) Nostoc. Agar-agar is produced from which of the following? (a) Gelidium (b) Laminaria (c) Oedogonium (d) Nostoc. 8. Which pigment of the plant takes part in light reaction of photosynthesis ? (a) xanthophyll (b) Chl-a (c) carotene (d) phycoxanthin. 9. Which of the following families show syngenesious stamens? (a) cucurbitaceae (b) compositae (c) malvaceae (d) tiliaceae. Taxonomic group of any rank is (a) class (b) order (c) taxon (d) phylum. The term genome denotes (a) haploid set of chromosome (b) bivalent (c) monovalent (d) diploid chromosomal set Author of the book "Origin of Species" is (a) A.Weismann (b) Lamarck (c) Alfred Wallace (d) Darwin. When seeds are attached to parent plant the type of germination is known as (a) ovipary (b) epigeal (c) vivipary (d) hypogeal. Inuiin, a low molecular weight polysaccharide is obtained from roots of (a) Dahiia (b) Raphanus (c) Tapioca (d) Coichicum. Which of the following families shows the presence of pollinia? (a) cruciferae (b) asdepiadaceae (c) asteraceae (d) poaceae. Fusion of male gamete with polar nuclei of embryo sac is known as (a) double fertilization (b) embryogeny (c) pollination (d) triple fusion (a) (b) (c) (d) Eusporangiate fern is produced from a group of sporangial, initial cell single initial cell epidermal cells hypodermal cells. (a) (b) (c) (d) True replication of DNA is possible due to hydroden_bonding phosphate backbone complementary base pairing rule none of the above. Transcription of genetic code occurs from DNA molecule to a (a) DNA molecule (b) RNA molecule (c) protein (d) both DNA and RNA A polypeptide is assembled on (a) ribosome (b) DNA (c) RNA (d) nucleolus. (a) (b) (c) (d) The largest herbarium in India is located in National botanical garden, Lucknow Lloyd botanical garden, Darjeeling Indian botanical garden, Sibpur, Howrah. Forest research institute, Dehradun Clove oil is obtained from (a) Syzygium aromaticum (Unopened flower bud) (b) Crocus sativus (c) Zingiber officinalis (d) Curcuma BIOLOGY TODAY | JANUARY'0917 The part of DNA molecule that varies among DNA molecule is (a) phosphate molecule (b) nitrogen base (c) sugar molecule (d) all of these 24. Molecule of ATP is structurally similar to the molecule of (a) DNA (b) RNA (c) protein (d) AMP An enzyme is a (a) carbohydrate (c) protein (b) lipid (d) DNA Bacteria are examples of (a) protistan cell (c) animal cell (b) eukaryotic cell (d) prokaryotic cell 27. The drug quinine is obtained from which part of Cinchona (a) bark (b) roots (c) leaves (d) flowers. A bacteriophage is a virus that parasites (a) fungi (b) bacterium (c) cyanophycean algae (d) protist. A virion is a (a) without protein coat virus (b) enucleated virus (c) prions (d) virus. Holoenzyme is produced by (a) combined coenzyme and apoenzyme (b) only prosthetic group (c) only protein part (d) cofactor. Embryo axis above the cotyledon is called as (a) epicotyl (b) hypocotyl (c) funicle (d) raphe. Aerenchyma is found in (a) epiphytes (c) halophytes (b) hydrophytes (d) xerophytes. In which stage of meiosis crossing over takes place (a) prophase - 1 (b) prophase (c) metaphase (d) anaphase. (a) (b) (c) (d) Oxidative phosphorylation means photo-oxidation during photosynthesis photolysis of water ATP production in respiration anaerobic respiration. Gram +ve and Gram -ve bacteria are differentiated on the basis of (a) cell wall (b) flagella (c) nucleus (d) DNA. (a) (b) (c) (d) Lenticels are loose cells on leaves subsidiary cells of stomata cells for respiration in epiphytes some loose cells on bark meant for aeration. BIOLOGY TODAY | APRIL 09 75 Chewing gum is produced from (a) Achrassapota (b) Cajanus (c) Prunus (d) Cocos. Which are the first organisms to colonize on a bare rock ? (a) fungi(b) lichens (c) diatoms (d) mosses. Which gymnospermic order includes all fossil plants ? (a) cycadofilicales (b) coniferales (c) gnetales (d) cycadales. 40. Brinjal, potato, tomato, onion, ginger belongs to (a) single family (b) species (c) 4 genera (d) same genus. (a) (b) (c) (d) Monocarpic plants flowers twice in every year bears only one type of flower flowers once in every year. dies after flowering once in its life cycle. 42. Papain produced from (a) Carica papaya (c) Citrus sp (b) Glycine max (d) Ficus carica. Ochreate stipules are found in (a) p'olygonaceae (b) acanthaceae (c) leguminosae (d) malvaceae. 44. which of the following is insectivorous plant ? (a) Vallisneria (b) Nepenthes (c) Rafflesia (d) Sahtalum. 45. Pith is absent in (a) protostele (c) solenostele (b) siphonostele (d) Cladosiphonostele. 46. Micropyle of seed facilitate in the entry of (a) air (b) pollen grains (c) C0 2 (d) water. (a) (b) (c) (d) In Na + - K + pump of active transport there is efflux of Na + and influx of K+ influx of Na + and efflux of K + only efflux of Na + influx and efflux of Na + only. 48. Most abundant lipid in a cell membrane is (a) phospholipid (b) sphingolipid (c) glycolipid (d) all of these. 49. in which phase of meiosis homologous chromosomes separates ? (a) metaphase I (b) metaphase II (c) anaphase I (d) anaphase II. Tonoplast is the membrane covering of (a) mitochondria (b) vacuole (c) chloroplast (d) ribosome. 51 • Tracheophyte includes (a) pteridophyte, gymnosperm and angiosperm •(b) bryophytes and spermatophytes (c) only spermatophytes (d) thalophytes and bryophytes. Guttation is caused due to (a) transpiration (b) high root pressure (c) closure of stomata (d) bleeding. Closure of stomata in response to water stress is controlled by which of the following hormones? (a) cytokinin (b) auxin (c) ABA (d) vernalin. When a molecule is reduced it always (a) loses electrons (b) loses both proteins and electrons (c) loses neutrons (d) gains electrons. (a) (c) Function of restriction enzyme is to cut the DNA at specific site (b) join the cut ends cut DNA at the ends (d) cut RNA at specific sites. Ephemerals are drought (a) loving (c) escaping (b) enduring (d) resistant The number of essential amino acids in adult human is (a) nine (b) eight (c) four (d) seven. 58. The first biocide used on a large scale was (a) (c) bordeaux mixture DDT (b) thurioside (d) benzene hexachloride. How many molecules of oxygen are carried by one molecule of haemoglobin ? (a) 6 (b) 8 (c) 2 (d) 4. During aerobic respiration maximum ATP is synthesized by (a) ETS. (b) Krebs'cycle (c) glycolysis (d) fermentation. 6 1 • Menstruation is triggered by an abrupt decline in the amount of (a) oestrogen (b) progesterone (c) inhibin (d) LH. The X/O syndrome is called (a) Turner's (b) Klinefelter's (c) Down's (d) Cushing's. Whose bicentenary is the year 2009? (a) Darwin (b) Edward Jenner (c) Stanley Miller (d) T.H.Morgan. 66. Most of the tree dwellers are found in which type of forest ? (a) deciduous forest (b) tropical rain forest (c) tundra (d) grassland. The geographic limit within which a population exists is called (a) niche (b) ecosystem (c) habitat (d) biome. Exponential growth occurs in (a) yeast (b) asexual reproduction (c) bacterial (d) all of these 69- Carrying capacity of a population is determined by (a) limiting resources (b) mortality rate (c) natality rate (d) predation. Energy and nutrients enter a community by (a) primary consumer (b) producer (c) decomposer (d) sunlight. Most harmful environmental pollutants are (a) biodegradable (b) corrosive agents (c) non biodegradable chemical (d) all of the above. 72. The virus that causes AIDS, parasitizes (a) suppressor T-cells (b) cytotoxic T-cells (c) B-cells (d) helper T-cells. Antibodies are synthesized by (a) B-lymphocytes (b) memory T-cells (c) helper T-cells (d) T-lymphocytes. Which one is always transferred in redox reaction? (a) neutron (b) electron (c) proton (d) electron and proton. Which of the following is used for long term energy storage by animals? (a) amino acids (b) glucose (c) fat (d) glycogen. Besides activating the egg another role of a sperm is to carry to egg (a) RNA (b) mitochondria (c) DNA (d) ribosomes. Total collection of genes at any time in a unit of evolution is (a) gene bank (b) gene library (c) genome (d) gene pool. In Mendel's experiment how many different kinds of seeds are produced from a short plant with wrinkled seeds (ttrr) ? (a) 9 (b) 4 (c) 2 (d) 1. Which of the following animals does not have a body composed of many segments ? (a) flatworm (b) grass hopper (c) earthworm (d) lobster BIOLOGY TODAY | APRIL 09 75 78. Which of the following is radially symmetrical ? (a) tapeworm (b) sea anemone (c) pinworm (d) centipede. Calotes versicolor belongs to class (a) osteichthyes (b) amphibia (c) reptilia (d) aves. : Darwin could not properly explain the theory of evolution j due to lack of | (a) evidences (b) variations ; (c) speciation (d) genetics. ' During Krebs' cycle energy from glucose is mostly transferred ; to I (a) NADH&FADH (b) NADPH Which most often limits the primary productivity of the I (c) ADP (d) water. ecosystem ? • Cerebral malaria is caused by (a) solar radiation/light (b) oxygen I (a) Plasmodium vivax (b) Plasmodium ovale (c) consumers (d) nitrogen. ; (c) Plasmodium malariae (d) Plasmodium falciparum. Interstitial fluid resembles ; Protective layer of ozone in the atmosphere exists in which (a) sea water (b) fresh water i layer. (c) ground water (d) none of these. | (a) troposphere (b) Ionosphere Blood enters the heart because muscles of the ; (c) stratosphere (d) atmosphere. (a) atrium contracts (b) atrium relaxes ; Which is not true for Paramecium ? (c) ventricle relaxes (d) ventricle contracts. ! (a) under unfavourable conditions, form cysts The exchange of materials between blood and interstitial j (b) presence of large number of cilia on whole body surface fluid is by ! (c) contain contractile vacuoles for osmoregulation (a) arterioles (b) arteries | (d) use pseudopodia for capturing prey (c) capillaries (d) veins. I The part of human hind brain that is responsible for handIn closed circulatory system blood is enclosed by (a) tubes (b) ducts (c) valves (d) vessels. ; eye coordination is ; (a) cerebellum ; (c) medulla oblongata Which of the following animals is a fish ? (a) shark (b) starfish (c) silver fish (d) jellyfish. Energy is stored in the liver and muscles in the form of • (a) carbohydrates (b) glycogen i (c) fat (d) protein. Which trait is not the characteristic of echinodermata ? (a) water vascular system (b) trochophore larva (c) Aristotle's lantern (d) radial and indeterminate cleavage. I A matured mammalian (RBC) is unusual because ; (a) it exhibits diapedesis (b) it is colourless ; (c) it has no nucleus (d) it can change its shape. 37. Which of the following is primarily an ectotherm? (a) pigeon (b) camel (c) lizard (d) rabbit. Both RBC and WBC are formed in the (a) thymus (b) adrenal (c) thyroid (d) bone marrow. i i j j ; (a) (b) (c) (d) (b) pons varolii (d) thalamus. All mammals possess seven cervical vertebrae are viviparous are homodont nourish young ones with milk. | Hydra reproduces by budding. This is an example of ! (a) asexual reproduction (b) sexual reproduction | (c) parthenocarpy (d) regeneration. Which of the following is pseudocoelomate ? (a) nematoda (b) chordata (c) echinodermata '(d) arthropoda. : Which of the following hormones is steroid? ; (a) relaxin (b) estrogen ; (c) thyroxine (d) insulin. Which of the following glands is enlarged in malaria? (a) pancreas (b) liver (c) spleen (d) all of these. The gas exchange surface in an earthworm is ! (a) tracheae (b) gills : (c) skin (d) ctenidia. Pleiotropic genes have (a) repressed phenotype (c) multiple phenotype Digestion in Hydra takes place within ; (a) pelvic cavity (b) abdominal cavity ; (c) pericardial cavity (d) gastrovascular cavity. (b) hidden phenotype (d) all of these. BIOLOGY TODAY | APRIL 09 75 105,Digestion is brought about by (a) hormones (b) neurotransmitters (c) growth factors (d) enzymes. 106.An artery is a vessel that carries blood (a) away from the heart (b) towards the heart (c) away from tissue (d) towards the liver. 107 .Most digestion and absorption of food takes place in (a) stomach (b) small intestine (c) large intestine (d) caecum. 108,Salivary amylase, a digestive enzyme begins digestion of (a) proteins (b) fats (c) carbohydrates (d) all of these. Connection of bone to bone is by (a) cartilage (b) tendon (c) muscle (d) ligament. 11(;.Last electron acceptor in ETS in (a) 0 2 (b) water (c) cytochrome c (d) cytochrome a 3 . Na + 11' The function of & (a) Na + in and K + out (c) NA + out and CI' in K+ pump is to (b) Na + out and K + in (d) CI" out and Na + in. Adrenaline is equivalent to which neurotransmitter ? (a) GABA (b) serotonin (c) epinephrine (d) norepinephrine. Green house effect means increase in the temperature of earth due to high conc. of N0 2 (b) increase in the temperature of earth due to high conc. S0 2 (c) increase in the temperature of earth due to high conc. C0 2 (d) increase in temperature of earth due to high conc. of C0 2 . (a) (a) (b) (c) (d) Sensory neurons of retina of eye are rods and cones maculae and cristae Pacinian and Ruffini's corpuscles all of these. 115.What is the best way to test the relatedness of two species ? (a) RNA and proteins (b) DNA & proteins (c) antibodies and transposons (d) none of these. 116.Diabetes mellitus is caused due to deficiency of (a) glucose (b) vasopressin (c) insulin (d) glucagon, 117.Which is not correct for sponges ? (a) internal fertilization (b) external fertilization (c) gemmule formation (d) gametes are formed from epidermal cells. Which of the following cranial nerves innervates heart, stomach and lungs ? (a) vagus (b) accessory (c) trigeminal (d) trochlear. During the course of evolution which part of the brain has shown maximum increase in size? (a) mid brain (b) fore brain (c) hind brain (d) all of the above. What is removed from the fitrate at loop of Henle? (a) amino acids (b) hormones (c) water (d) glucose. ANSWER KEYS (a) (a) (c) (b) (0 31. (a) (a) (a) (c) (a) (b) (0 (a) (c) (a) (c) (a) (c) (d) (b) 2. (b) 8. (b) 14. (a) 20. (a) 26. (d) 32. (b) 38. (b) 44. (b) 50, (b) 56. (c) 62, (c) 68. (b) 74. (b) 80. (a) 86. (b) 92. (d) 98. (b) 104. (d) 110. (a) 116. ( 0 3. 9. 15. 21. 27. 33. 39. 45. 51. 57. 63. 69. 75. 81. 87. 93. 99. ( 0 4. (b) 5. (a) 11. ' (a) (b) 10. (0 16. (b) (d) 17. (a) 22. (a) 23. (b) (0 (a) 28. (b) 29. (d) (a) 34. (c) 35. (a) (a) 40. (c) 41. (d) (a) 46. (d) 47. (a) (a) 52. (b) 53. (c) (b) 58. (c) 59, (d) (d) 64. (a) 65. (a) (a) 70. (b) 71. ( 0 (c) 76. (d) 77. (a) (a) 82. (b) 83. (c) ( 0 88. (d) 89. (a) (a) 94. (d) '95. (c) (c) • 100. (d) 101. (a) (d) 106. (a) 107. (b) (b) 112. (c) 113. (d) (b) 118. (a) 119. (b) (d) (d) (c) (b) (a) (d) (a) 48. (a) (d) (a) (b) (d) (b) (d) 3. (c) (d) 10 (b) (c) (a) 120.(c) Human Biology 700+ MCQ's from AIIMS, CBSE-PMT.AFMC, Manipai & Other National I State PMT's 2000 + H i g h Yield Fact's HUMAN . BIOLOGY 400 + Points to Remember Available at all leading bookshops all over the country MTG BOOKS 503, Taj Apt. Ring Road, New Delhi- 110 029 Tel.: 26191601, 26194317 B I O L O G Y TODAY | APRIL 09 75 SOLVED PAPER Z 0 0 9 iMU MEIICi 1. In Calotropis, phyllotaxy of leaves is (a) alternate (b) opposite (c) whorled (d) none of these. 2. The famous botanical garden of Kew is located in (a) India (b) England (c) Germany (d) France. 3. Rhizophora has (a) prop roots (c) pneumatophores (b) stilt root (d) modified roots. 4. When placenta forms a ridge along the ventral suture of the ovary and the ovules are borne on this ridge forming two rows, the type of placentation is termed as (a) marginal (b) axile (c) parietal (d) free central. 5. An example of liliaceae family is (a) lupin (b) soyabean (c) Petunia (d) tulip. 6. In drupe of coconut the mesocarp is (a) fleshy (b) fibrous (c) stony (d) watery. 7. The plant tissues commonly found in fruit walls of nuts and pulp of some fruits like guava are termed as (a) fibres (b) tracheids (c) sclereids (d) vessels. 8. Conjoint and closed vascular bundles with no phloem parenchyma may be observed in (a) monocot stem (b) monocot root (c) dicot stem (d) dicot root. 9. Axoneme having 9 + 2 doublet microtubule arrangement is found in (a) cilia (b) flagella (c) cilia and flagella (d) centriole. 10. (a) (b) (c) Stem may function for storage, support and vegetative propagation protection spread branches (d) all of these. 11 In chlorophyll structure four pyrrole rings are united with Mg by their atoms of (a) N (b) C (c) H (d) 0. An alternate C0 2 fixation mechanism was found in some tropical species of grass family by Hatch and Slack, who were from (a) England (b) USA (c) Australia (d) New Zealand. (a) (b) (c) (d) The fixation and reduction of C0 2 occur in presence of ATP ATP and NADPH NADPH, chlorophyll and water ATP, NADPH and light. 14. The chromosomes with centromere situated close to its end forming one extremely short and one very long arm is known as (a) metacentric (b) submetacentric (c) acrocentric (d) telocentric. Most of the water flow in the root takes place via the apoplast because (a) cortical cells are loosely arranged (b) cortical cells are living cells (c) cortical cells are thin walled cells (d) all of the above. 16. The Environment (Protection) Act to protect and improve the quality of environment (air, water and soil) was passed by the Government of India in the year (a) 1971 (b) 1974 (c) 1981 (d) 1986. 17. Sphagnum is commonly used as packing material for transshipment of living material due to its (a) capacity to hold water (b) easy availability (c) nature as it can grow any where (d) all of the above 18. During one Krebs' cycle number of C0 2 molecules released is (a) 1 (b) 2 (c) 3 (d) 4 19. Laminaria and Fucus belong to (a) chlorophyceae (b) rhodophyceae (c) phaeophyceae (d) cyanophyceae. 20. A typical angiospermic embryo sac at maturity is eight nucleate and (a) single celled (b) four celled (c) seven celled (d) eight celled. Assured seed set is possible even in absence of pollinators when pollination is (a) chasmogamous (b) cleistogamous (c) geitonogamous (d) xenogamous. In a mature embryo sac the central cell is (a) single nucleate (b) binucleate (c) four nucleate (d) eight nucleate. B I O L O G Y TODAY | APRIL 09 75 2 3 Endosperm may completely be consumed by the developing embryo before the seed maturation in (a) pea (b) groundnut (c) pea and groundnut (d) castor, pea and groundnut. 24. In seven pairs of contrasting characters in pea plant studied by Mendel the number of flower based characters was (a) 1 (b) 2 (c) 3 (d) 4. 25. During the study of incomplete dominance in a cross between true breeding red flowers (RR) and true breeding white flowers (rr) when F, was self pollinated the resulted F2 ratio may be (a) 1 (RR) red : 2 (Rr) pink : 1 (rr) white (b) 2 (RR) red : 1 (Rr) pink : 1 (rr) white (c) 1 (RR) red : 1 (Rr) pink : 2 (rr) white (d) 3 (RR) red : 1 (rr) white. 26. The number of stop codons which do not code for any amino acid is (a) 1 (b) 2 (c) 3 (d) 4. 27. From bacteria to men nearly universal code for phenylalanine is (a) UUU (b) UUA (c) UUG (d) CUU. 28. The number of triplet codons having all the three bases same in 64 triplet codons is (a) 2 (b) 4 (c) 6 (d) 8. 29. International Rice Research Institute (IRRI) is located in (a) Japan (b) Philippines (c) Mexico (d) India. 30. (a) (b) (c) (d) Point mutation may occur due to alteration in DNA sequence change in a single base pair of DNA deletion of a segment of DNA gain of a segment in DNA. 31. In a grassland ecosystem, if the number of primary producers is approximately 6 million plants, the number of top carnivore (in million) which may be supported by it may be (a) 3 (b) 30 (c) 6 (d) 60. 32. The most widespread group of organisms on earth belongs to kingdom (a) monera (b) protista (c) fungi (d) plantae. 33. (a) (b) (c) (d) Sexual reproduction in fungi may occur by means of sporangiospore, oospore and ascospore zoospore, oospore and ascospore sporangiospore, ascospore and basidiospore oospore, ascospore, basidiospore. 34. The athlete's foot disease in humans is caused due to (a) bacteria (b) fungi (c) virus (d) none of these. 35. Lactic acid bacteria (LAB) at suitable temperature converts BIOLOGY TODAY |APRIL09 75 milk to curd, which improves its nutritional quality by enhancing vitamin (a) A (b) B (c) C (d) D. 36. Isolation of Bt gene from bacterium (Bacillus thuringiensis) was taken up in the year (a) 1977 (b) 1980 (c) 1997 (d) 1990. 37. in a nucleotide having a cytosine base and linked to a sugar by glycosidic bond at carbon number (a) 1 (b) 2 (c) 4 (d) 5. 38. Among the nitrogenous bases involved in DNA and RNA formation, the double ring base is (a) uracil (b) guanine (c) thymine (d) cytosine. 39. Oxygen carrying capacity of human blood is reduced due to the pollution of (a) C0 2 (b) CO (c) S0 2 (d) 0 3 . 40. An immobile element in plants is (a) nitrogen (b) phosphorus (c) potassium (d) calcium. 41. A dominant gametophytic phase alternated by multicellular dependent sporophytic phase is represented by (a) Chlamydomonas (b) Polytrichum (c) Adiantum (d) all of these. 42. Starch sheath is another name of (a) hypodermis (b) epidermis (c) casparian strip (d) none of these. 43. The microtubules from opposite poles of the spindle get attached to the kinetochores of sister chromatids in (a) prophase II (b) metaphase II (c) anaphase II (d) none of these. 44. with (a) (c) For the same amount of C0 2 fixed, a C4plant, in comparison a C3 plant, loses only half amount of water (b) equal amount of water double amount of water (d) none of these. 45. In the cell walls ofthe guard cells, cellulose microfibrils are oriented (a) radially (b) transversely (b) tangentially (d) obliquely. Methanogens, growing anaerobically on cellulosic material, produce (a) methane (b) methane and carbon dioxide (c) methane and hydrogen (d) methane, carbon dioxide and hydrogen. 47, Formation of liquid endosperm in coconut takes place because (a) karyokinesis is not followed by cytokinesis (b) karyokinesis is followed by cytokinesis (c) formation of liquid endosperm is not dependent upon karyokinesis and cytokinesis (d) none of the above. 48 The enzymes ribulose biphosphate carboxylase-oxygenase and phosphoenol pyruvate carboxylase are activated by (a) Mg (b) Zn (c) Mo (d) Mn 49. Appearance of brown spots surrounded by chlorotic veins is a prominent toxicity symptom of (a) Mn (b) Mo (c) Mg (d) Zn. Biomagnification of DDT in an aquatic food chain starting from water having a concentration of 0.003 ppb may go, in fish eating birds, upto (a) 2 ppm (b) 25 ppm (c) 50 ppm (d) 100 ppm. 51. It is estimated that about 85% ofthe earth's photosynthetic activity is carried out by (a) trees (b) savannahs (c) phytoplanktons (d) herbaceous plants. (a) (b) (c) (d) The 32 cells stage ofthe human embryo is smaller than the fertilized egg same size as the fertilized egg two times of the size of the fertilized egg four times the size of the fertilized egg. One common secretion ofthe salivary and Brunner's glands that plays a role in growth, repair and regeneration is (a) enterogastrone (b) urogastrone (c) neurotensin (d) somatostatin. 54, (a) (c) (d) Lack of pulmonary surfactant produces asthma (b) emphysema cystic fibrosis respiratory distress syndrome. Which of these sets is incorrect ? (a) Plasmodium falciparum, malaria, relapse, mosquito (b) Trypanosoma gambiense, Glossina,sleeping sickness, winter bottom's sign (c) Wuchereria bancrolti, elephantiasis, microfilariae, mosquito (d) Entamoeba histolytica, dysentry, quadrinudeate cyst, colon. (a) (b) (c) (d) Which is a characteristic of a graded potential ? the amplitude is always the same the duration varies always followed by a refractory period is an all or none response. Rejection of tissue or organ transplants is brought about mainly by (a) cytotoxic T cells (b) NK cells (c) suppressor T cells (d) B cells. 5§ The anterior abdominal vein in frog is formed by the union of (a) femoral vein (b) sciatic vein (c) renal vein (d) pelvic vein. Secretin (a) stimulates enzyme secretion by pancreas, inhibits acid secretion in stomach, stimulates gall bladder (b) stimulates bicarbonate secretion by pancreas, inhibits acid secretion in stomach, stimulates bicarbonate secretion by liver (c) stimulates acid secretion in stomach, potentiates action of CCK, inhibits intestinal movement (d) stimulates gall bladder, inhibits acid secretion in stomach, stimulates bicarbonate secretion by pancreas. 60. A progressive series of changes in plant and animal life of an area from initial colonization is known as (a) evolution (b) succession (d) specialisation (d) selection. 61. Phenylketonuria is an autosomal recessive disorder located on chromosome (a) 17 (b) 16 (c) 12 (d) 11. 62. (a) (b) (c) (d) The Paget's disease is caused by prolonged deficiency of vitamin D in adults abnormal bone resorption by abnormal osteoclasts excess alkaline phosphatase excess production and abnormal organization of collagen. Colostrum provides the infant with (a) auto immunity (b) passive immunity (c) active immunity (d) innate immunity. This is not Darwinian concept (a) variations (b) struggle for existence (c) natural selection (d) survival of the fittest. 65. In the male reproductive system, sperms are concentrated in the (a) rete testis (b) epididymis (c) vas deferens (d) seminal vesicle. 66. The most commonly used marker enzyme in clinical diagnosis of prostate cancer is (a) amylase (b) alkaline phosphatase (c) y-GTPase (d) acid phosphatase. 67. Obesity of face, hyperglycemia and virilism in females is characteristic of (a) Grave's disease (b) Addison's disease (c) Conn's disease (d) Cushing's syndrome. 68. In the sigmoid growth curve the upper asymptote represents the period of (a) establishment (b) positive acceleration (c) negative acceleration (d) equilibrium. 69. In human beings the total visual field and the stereoscopic visual field respectively is (a) 180° and 140° (b) 140° and 26° (c) 180° and 26° (d) 140° and 52° 70. (a) (b) (c) (d) In females the hormone inhibin is secreted by granulosa and theca cells granulosa cells and corpus luteum granulosa and cumulus oophorus cells granulosa cells and zona pellucida. BIOLOGY TODAY | APRIL 09 75 71. In normal healthy individuals the percentage of adult and fetal haemoglobin, HbA : HbA2 : HbF is (a) 96 : 2 : 2 (b) 45 : 45 : 10 (c) 50 : 45 : 5 (d) 80 : 10 : 10. 72 This class of antibodies is made up of five immunoglobulin units (a) IgG (b) IgM (c) IgA (d) IgD. 73. One of the oldest, best preserved and most complete hominid fossil commonly known as 'Lucy' belongs to the genus (a) Oreopithecus (b) Dryopithecus (c) Pithecanthropus (d) Australopithecus. 74. The protein part of a conjugated enzyme is (a) holoenzyme (b) isoenzyme (c) apoenzyme (d) coenzyme. 75. An association between two individuals or populations where both are benefitted and where neither can survive without the other is (a) commensalism (b) amensalism (c) proto-cooperation (d) mutualism. 76. Upon stimulation of skeletal muscles calcium is immediately made available for binding to troponin from (a) blood (b) lymph (c) sarcoplasmic reticulum (d) bone. 77. Biogenic amines are synthesized from (a) tryptophan (b) glutamic acid (c) tyrosine (d) phenylalanine. 78. A siderocyte is a RBC containing (a) pappenheimer bodies (b) russel bodies (c) herring's bodies (d) schuffner's dots. 79. Which of the following sets is most correct for the catabolism of an 18 carbon fatty acid ? (a) mitochondria, beta-oxidation, 140 ATP molecules (b) cytosol, beta oxidation, 146 ATP molecules (c) mitochondria, beta oxidation, 146 ATP molecules (d) cytosol, beta oxidation, 140 ATP molecules. 80. Neutrophils promote adhesion of neutrophils to endothelium, attract other neutrophils, monocytes and eosinophils and dilate capillaries by secreting (a) cytokines (b) leucotrienes (c) lymphokines (d) monokines. 81. lack (a) (c) Liver necrosis and muscular dystrophy are caused by the of this trace element arsenic (b) molybdenum zinc (d) selenium. 82. According to Allen's rule mammals in cold regions have to conserve body heat. (a) smaller extremities (legs, tails and ears) (b) longer extremities (c) larger body mass (d) smaller body mass. BIOLOGY TODAY | APRIL 09 75 83. Photochemical smog is caused by a light mediated reaction between (a) N0 2 and unsaturated hydrocarbons (b) N0 2 and 0 3 (c) S02 and unburnt hydrocarbons (d) S02 and 0 3 84. Myelin of the nerve fibres of the central nervous system is produced and maintained by (a) oligodendrocytes (b) astrocytes (c) microglia (d) Schwann cells. 85. This facial bone is unpaired (a) lacrimal (b) palatine (c) nasal (d) vomer. 86. One of the chief functions of smooth endoplasmic reticulum (a) protein synthesis (b) lipid synthesis (c) enzyme production (d) microtubule production. 87. All sensory pathways to the cerebral cortex synapse at the (a) pons (b) hypothalamus (c) thalamus (d) cerebellum. 88. (a) (b) (c) (d) In the earthworm integumentary and pharyngeal nephridia are exonephric pharyngeal and septal nephridia are enteronephric pharyngeal and septal nephridia are exonephric integumentary and septal nephridia are enteronephric. 89. Which of the following is correct ? (a) water reabsorption in descending limb of loop and collecting duct occur under similar conditions. (b) sodium reabsorption in ascending limb of loop and collecting duct occur under similar conditions. (c) water reabsorption in descending limb of loop and collecting duct occur under different conditions. (d) water reabsorption in descending limb and sodium reabsorption in ascending limb of loop occur under similar conditions. 90. In the nymphal stage of cockroach the juvenile hormone is secreted by (a) corpora cardiaca (b) corpora allata (c) prothoracic gland (d) intercerebral gland cells. 91. In the resting person, saturation of haemoglobin as blood leaves the tissue capillaries is approximately (a) 75% (b) 40% (c) 3% (d) 46%. 92. (a) (c) (d) High frequency sound waves vibrate the basilar membrane near the oval window (b) near the helicotrema in the middle of cochlea from oval window to helicotrema. 93. This enzyme present in retroviruses converts single stranded RNA into a double stranded viral DNA (a) transcriptase (b) reverse transcriptase (c) RNA polymerase (d) DNA polymerase. 94. In the extrinsic clotting pathway the active factor VII activates factors (a) (c) X and XI IX and X (b) IX and XI (d) XI and XII Which National park is the new home ofthe Indian onehorned rhinoceros ? (a) Dudhwa (b) Corbett (c) Kanha (d) Bandhavgarh. 96. If the heart sound recording and ECG recordings are superimposed then the first heart sound would occur (a) at the P wave (b) just after the P wave (c) just before the QRS complex (d) just after the QRS complex. Memory Confer 1. W h o can participate If you have taken any o f t h e exams given below and possess plenty of grey cells, photographic memory then you are the right candidate forthis contest. All you have to do is write down as many questions (with all choices) you can remember, neatly on a paper with name of the e x a m , your n a m e , address, age, your photographandmailthemtous. 2. The exams 97. Cyclosporin A an immunosuppressive drug is produced by (a) Aspergillus niger (c) Penicillium notatum (b) Manascus purpureus (d) Trichoderma polysporum. 98. Deuterostome condition and indeterminate radial cleavage are characteristics of (a) chordates and arthropods (b) chordates and echinoderms (c) arthropods and echinoderms (d) chordates, arthropods and annelids. 99. and (a) (c) P M T : AFMC, BHU, AIIMS, JIPMER, Delhi PMT, H.P., WB JEE, Punjab, Haryana CET, Safdarjung V M M C , CMC Vellore, Maharashtra CET, U.P. In human per cent of body weight of carbohydrates, lipids proteins respectively is 1,15,17 (b) 1 5 , 1 7 , 7 . 7,17,15 (d) 1 7 , 1 5 , 7 . 100.In the Krebs' cycle the FAD electron transport system operates during the conversion of (a) succinyl CoA to succinic acid (b) a-ketoglutarate to succinyl CoA (c) succinic acid to fumaric acid (d) fumaric acid to malic acid. CPMT, Orissa JEE, M.P. PMT E n g i n e e r i n g : DCE, UPSEE, Haryana CEE, MP PET, J & K CET, AMU, WB JEE, Bihar CECE, Jharkhand CECE, Orissa JEE, Maharashtra CET, PunjabPET,.... 3. The Benefits Plenty! Each complete question with answer will make you richer by Rs. 5*1- More the questions, the merrier it will be. We will make you famous by publishing your name (photo if possible). Also you can derive psychological satisfaction from the fact that your questions will benefit thousands of readers. 4. a n d l a s t l y t h e p i t f a l l s ..»» Don't send incomplete question. Our panel of experts will cross-check your questions. You have to send it within a month of giving the particularexam. ANSWER KEYS 1. 5. 10. 15, 20. 25. 30. 35. 40. 45. 50. 55. 60. 65. 70. 75. 78. 83, 88. 93. 98. (b) (d) (d) (a) (c) (a) (b) (b) (d) (a) (b) (b) (b) (b) (b) (d) (a) (a) (b) (b) (b) 2. 6. 11, 16, 21. 26. 31. 36. 41. 46. 51. 56. 61. 66. 71. 76. 79. 84. 89. 94. 99. (b) (b) (a) (d) (b) (c) (a) (b) (b) (a) (c) (0 (c) (d) (a) (c) (c) (d) (a) (c) (a) J. 7. 12. 17. 22. 27. 32. 37. 42. 47. 52. 57, 62. 67. 72. 77, 80, 85. 90. 95. 100. ( a S :C) 4. (a) 9. (c) 8. (a) (c) 14. ( 0 13. (b) (c) 18. (b) (a) 19. ( 0 24. (b) (b) 23. (c) 29. (b) (a) 28. (b) 34. (d) 33. (d) (b) 39, (b) (a) 38. (b) 44. (b) (c) 43, (b) 49. (a) 48. (a) (a) 54. (b) 53. (d) (b) 59. (a) 58. (d) (d) 64, (b) 63. (b) (d) 69. (d) 68. (d) (a) 74. (c) (b) 73. (d) (all the options are correct) 82. (a) 81. (d) (a) 87. (d) 86. (b) (a) 92. (a) 91. (a) (a) 97. (a) 96. (d) (d) (c) ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ M a i l t o : T h e E d i t o r , M T G , 4 0 6 , T a j A p t „ Ring Road, NearSafdarjung Hospital, N e w D e l h i - 2 9 . Tel. : ( 0 1 1 ) 4 6 6 8 6 0 0 0 * Conditions apply o o o o Payment will be made after the MCQs are published. Kindly note that each question should be complete, Payment will be made only for complete questions. Preference will be given to the reader sending the maximum complete and correct questions. Other conditions apply. The decision ofthe Editor, MTG shall be final and binding. B I O L O G Y TODAY | APRIL 09 75