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79., Bulk movement of subatances through the conducting or vascular tissues of plants is, called, (a) diffusion, (b) tranalocation, (c) transpiration, ん。, (d) transcription, li, 80,, The first product of CO2 fixation in C4 plants is, (a) ribulose 1,5-biephosphate, (b) oxaloacetate, (c) głyceraldchyde 3-phosphate, (d) phosphoglycerate, 81., Which of the following statements is correct?, (a) RNA pol I synthesizes MRNA, rRNA, (b) RNA pol Il synthesizes 45S pre-rRNA, RNA pol III synthesizes 58 rRNA, (d) RNA pol I synthesizes tRNA, 82., A genetic mutation has occurred in a coding region of a gene but the amino acid, sequence of the encoded protein is not altered. It is callled, (a) point mutation, types of, (b) non-sense mutation, A synonymous mutation, mut ation, (d) non-synonymous mutation, 83., Which of the following processes during mitosis is afected by colchicine treatment?, (a) DNA replication, (b) Cytokinesis, (c) Spindle formation, (d) Chromosome doubling, /38-A, 20

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Which of the following pigments is present in the human skin?, (b) Melanin, (c) Melatonin, (d) Myosin, 78., Which one of the following is infected by mosquito to human in' malarial infection?, (a) Merozoite, (b) Sporosoite, (c) Gametocyte, (d) Oocyte, V-8/

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69., A plant requires nitrogen and sulphur for its, (a), cell wall, (b) storage vacuoles, enzymes, d) energy stores, 70., Which of the following functional groups is not commonly found in proteins?, (al Alcohol, ) Aldehyde, (9 Amide, ) Amine, L 71., A computerized microscope that couples a laser source to a fiuarescent microscope is, called a/an, * Microscopy, fa) atomic force microscope, () scanning electron microscope, differential interference contrast microscope, confocal scanning microscope, 72., Chaperonins are proteins that, fa) assist the correct folding of other proteins, (b ansist the transport of proteins to specific intrecelhular locations, (c) ocate a DNA binding protein correctly to its target site, (d) aid in MRNA splicing, 73., Cultivated soil lacks which of the following?, arltivalid sril like, allunial hoil lacks, haunne nohich is feeund, ino learizen, (a) A horizon, (b) B horizon, C horizon, O horizon, 18

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68., The yellowing of leaves, called chlorosis, is usually caused by insufficient, (a) sodium, (b) phosphorus, calcium, (), (d) magnesium, (p), /38-A

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41., During which of the following stages of prophase I, crossing-over takes place?, a Pachytene, (b) Leptotene, (c) Zygotene, (d) Diplotene, 12. Discontinuously synthesized DNA fragments are joined together by which of the, following enzymes?, (a) DNA primase, (b) DNA polymerase, 4 DNA lgane -t joins, jais, Okazaki freymenls ., (c) DNA, (d) DNA synthetase, 43. The heart of fish consists of, - chambers., striem, Lmo chambers ventricle., (a) 3, (b) 4, (d) 1, 44., Water-holding capacity of soil is determined by, (a) snowfall and rainfall, (b) temperature, fc) both rainfall and temperature, ta) teiture of soil, 45., Which one of the following experiences the lowest range of temperature variation in its, natural habitat?, (a) Polar bear, (b) Tropical trees, (c) Snow leopard, (d) Pish in tropical region, /38-A, 12