Csir Net Dec 2011 Answer Key Mathematical Science

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download csir net jrf december 2011 entrance life science answer key

Transcript of Download CSIR NET JRF Dec 2011 Answer Key

CSIR-JRF-NET Life Sciences December 2011 Code B ANSWER SHEETPART A Q1. Magnesium powder, placed in an air- tight glass container at ...... Answer : 4. 0.8 bar Q2. Living beings get energy from food ...... Answer : 3. oxygen Q3. In ABC, angle A is larger than angle C and ...... Answer : 2. 53 Q4. Which of the following statements about ...... Answer : 3. it has steadily increased since the formation ...... Q5. See the following mathematical ...... Answer : 4. (iv) to (v) Q6. The Number of craters observed due to meteoritic impacts ...... Answer : 4. earlier craters are not preserved ..... Q7. What is the angle in the quadrant of a ...... Answer : 1. 135 Q8. During a total solar eclipse occurring at ...... Answer : 1. on the following night only Q9. A cupboard is filled with a large number of balls of 6 different ...... Answer : 4. 6 Q10. The variation of solubilities of two compounds ...... Answer : 3. solubility of X and Y are the same at 75C Q11. Restriction endonuclease cleaves DNA molecules at ...... Answer : 1. 4 Q12. A solid cube of side L floats on water with 20% of its volume ...... Answer : 1. 4 Q13. Inner planets of the solar system are rocky, whereas outer ...... Answer : 1. solar heat drove away the ............

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Q14. On exposure to desiccation, which of the following ...... Answer : 4. Cocci in clusters Q15. A bell is rung before giving food to a dog. After doing this ...... Answer : 2. the dog salivates on hearing the bell Q16. When a magnet is made to fall free in air it falls ...... Answer : 1. a part of the gravitational potential ..... Q17. For an elastic material, strain is proportional to stress ...... Answer : 1. Q18. The conductance of a potassium chloride solution is ...... Answer : 2. 0.5 Q1 9 . An overweight person runs 4 km everyday as an Answer : 3. 20 % less Q20. What is the half-life of the radio isotope ...... Answer : 1. 1 day PART B Q21. A single-strand nick in the parental DNA helix ...... Answer : 4. homologous recombination Q22. In which form of DNA, the number of ...... Answer : 2. B Q23. -amanitin inhibits Answer : 2. only RNA polymerase II Q24. Graft rejection does not involve Answer : 1. erythrocytes Q25. Which of the following is not a prosthetic ...... Answer : 4. Pterin Q26. Reverse transcriptase has both ribonuclease ...... Answer : 2. the degradation of RNA strand Q27. Toxic shock is caused by Answer : 2. excessive stimulation of large proportion of T cells by ...... Q28. Horse shoe crabs belong to the group. Answer : 2. chelicerata ......

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Q29. Aquatic primary production was measured using ...... Answer : 4. L D Q30. The first living beings on earth were ...... Answer : 1. there was no oxygen in air Q31. The blastopore region of amphibian embryo that ...... Answer : 2. Nieuwkoop center Q32. Which of the following acts as a branch point for the ...... Answer : 1. farnesyl pyrophosphate Q33. In a normal human eye, for sharp image formation on the ...... Answer : 2. cornea Q34. Indirect immunofluorescence involves ...... Answer : 1. immunoglobulin-specific antibodies Q35. Which of the following processes interferes Answer : 1. Horizontal gene transfer Q36. Which of the following groups of ...... Answer : 1. Black buck, ...... Q37. In gene regulation, open reading frame (ORF) implies Answer : 3. a series of triplet codons that begins ...... Q38. Which replicating DNA, the rate of ...... Answer : 2. 3 5 proof reading activity of DNA polymerase Q39. Which of the following set of cell organelles ...... Answer : 1. chloroplast and peroxisomes Q40. The atmosphere in a sealed space craft contains Answer : 2. a mix of oxygen and nitrogen Q41. To keep them in a totipotent state, embryonic ...... Answer : 2. leukemia inhibiting factor Q42. One of the methods for finding common regulatory motifs ...... Answer : 2. MEME Q43. Measurement and mapping with spatial resolution the membrane ...... Answer : 1. radioisotope

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Q44. A plant of the genotype AaBb is selfed ...... Answer : 4. 1/16 Q45. In contrast with plant cells, the most distinctive feature ...... Answer : 1. control of cell cycle transitions by protein kinases Q46. During development of embryos in ...... Answer : 1. establishment of auxin gradients Q47. Which of the floral whorls is affected in ...... Answer : 3. stamens and carpels Q48. Chloroplast distribution in a photosynthesizing cells is ...... Answer : 1. move to the side walls Q49. The membrane lipid molecules assemble ...... Answer : 3. liposome Q50. Which of the following waves is likely to be absent in Answer : 3. T Q51. On the molar scal which of the following interactions in ...... Answer : 2. Hydrogen bonding Q52. In this flow diagram name the chemicals A, B, C ...... Answer : 4. Renin, Angiotensinogen, Angiotensin I, Angiotensin II Q53. The Hutchinsonian concept of ecological niche is based on Answer : 2. multidimensional hypervolume Q54. A specialist species has a Answer : 2. narrower niche and high efficiency of niche utilization Q55. The presence of Salmonella in tap water in ...... Answer : 2. human excreta Q56. Amino acid selenocysteine (Sec) is ...... Answer : 4. charging of serine into tRNA ser, modification ...... Q57. Michaelis and Menten derived their ...... Answer : 1. rate limiting step in the reaction is the breakdown of ES ...... Q58. Ethylene binding to its receptor, does not lead to ...... Answer : 2. phosphorylation of the receptor (This could be the most probable answer)

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Q59. Most common type of phospholipid in ...... Answer : 4. sphingomyelin Q60. Which of the following meternal effect gene products ...... Answer : 2. Bicoid and Hunchback Q61. The base analog 2-aminopurine pairs with thymine, ...... Answer : 2. transition Q62. Which of the following is not a physiological ...... Answer : 4. low photosynthetic rate Q63. In transverse sections of a young stem, if vallecular ...... Answer : 4. equisetales Q64. A sample counted for one minute shows a count rate ...... Answer : Q65. Batrachochytrium dendrobatidis, a fungus, has been ...... Answer : 2. frogs Q66. What kind of aneuploid gametes will be ...... Answer : 3. both n + 1 and n 1 Q67. The peacocks tail is an example of ...... Answer : 3. sexual selection Q68. Wetlands are conserved internationally ...... Answer : 4. Ramsar convention Q69. The rattans and canes that we use in ...... Answer : 2. palms Q70. Which of the following features is not shown by ...... Answer : 4. Inhibition of early steps in the biosynthesis of ..... PART - C Q71. The erythrocyte membrane cytoskeleton consists of a ...... Answer : 3. mutant spectrin defective in dimerization ability Q72. Synthesis of normal hemoglobin requires coordinated synthesis of globin ...... Answer : 3. B, C and D Q73. Equilibrium constant (K) of noncovalent interaction ...... Answer : 2. 2764 kcal/mole (but answer should be -2764 cal/mole )

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Q74. Bacteriophage has two modes in its life cycle, ...... Answer : 1. A and B Q75. Biosynthesis of tyrosine is detailed ...... Answer : 1. ATP, phosphoenolpyruvic acid, ...... Q76. API (APETLA 1) is one of the floral meristem identifying ...... Answer : 4. stimulation of flowering in the ..... Q77. The figure above represents a late zebrafish ..... Answer :1. A and C Q78. Following are same statements regarding ..... Answer : 1. A, C and F Q79. An isolated carotid sinus was prepared so that the pressure ...... Answer : 1. A, B and C Q80. Number of trials required for rats to ...... Answer : 4. learning was reduced by sleep loss Q81. in the following inferences is most appropriate ...... Answer : Q82. Denaturation profiles of DNA are shown below...... Answer : 3. G + C content of C > B > A in DNA of ..... Q83. Cre/loxP system is used by phage PI to remove terminally ...... Answer : 3. Q84. Assuming a 1: 1 sex ratio, what is the probability ...... Answer : 1. 0.375 Q85. Maturation-promoting factor (MPF) controls the initiation of mitosis in ...... Answer : 4. cyclin B lacking the cyclin ..... Q86. In an in vitro experiment using radiolabelled ...... Answer : 2. B and C Q87. The bacterial flagellar motor is a multi-protein complex. Rotation of ...... Answer : 3. mutated H+ ATPase Q88. Pre-mRNAs are rapidly bound by snRNPs which carry out dual steps ...... Answer : 1. A and B

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Q89. Assume a male sparrow (species X) is hatched and reared in ...... Answer : 1. It will sing the song of species Y ..... Q90. Consider the following crosses involving grey ...... Answer : Q91. Genomic DNA of transgenic plants (P1, P2 and P3) obtained ...... Answer : 3. P1 contains two, whereas ..... Q92. Figures A and B respectively represent the dideoxy ...... Answer : 3. Frameshift Q93. The ABO blood type in human is under the control of autosomal multiple ...... Answer : 3. 1/8 Q94. If van der Waals interaction is described by the ...... Answer : 4. dipole-dipole repulsion Q95. A 1 meter tall object was placed 10 meter in ...... Answer : 2. 1.7 mm Q96. In human, protein coding genes are mainly organized as ...... Answer : 2. protein coding gene and RNA coding genes Q97. A fixed smear of a bacterial culture is subjected to the ...... Answer : 2. acid-fast Mucobacterium sp Q98. Survival of intracellular pathogens depends on the levels of ...... Answer : 3. IL-6 treated cells contain more intracellular bacteria than control Q99. The genetic relatedness (r) of an individual to his nephew is ...... Answer : 2. more than the cost ...... Q100. The following is a schematic representation of region ...... Answer : 3. a-4, b-1, c-2, d-3, e-5, f-6 Q101. Many cancers carry mutant p53 genes, while some ...... A