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GATE 2015 : Life Sciences [Section J]

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GATE 2015 BOTANY XL-J J : BOTANY Q. 1 Q. 10 carry one mark each. Q.1 Nuclear membrane is absent in (A) Chlamydomonas (B) Nostoc (C) Volvox (D) Chlorella Q.2 An organized and differentiated cell having cytoplasm but no nucleus is found in (A) Companion cell (B) Xylem parenchyma (C) Sieve tube element (D) Phloem parenchyma Q.3 Double haploids in plants can be induced by (A) Mitomycin-C (B) Mirin (C) Colchicine (D) 5-Azacytidine Q.4 During fatty acid biosynthesis, the first intermediate malonyl-CoA is formed from (A) Acetyl-CoA and bicarbonate (B) Two acetyl-CoA molecules (C) Acetyl-CoA and biotin (D) Palmitoyl CoA and acyl-carrier protein (ACP) Q.5 Which of the following techniques is NOT applicable for evaluating the expression of a transgene? (A) Northern blot (B) RT-PCR (C) Western blot (D) Southern blot Q.6 Identify the CORRECT family possessing the following characters: presence of glucosinolates, tetradynamous stamens, superior ovary with parietal placentation and siliqua type fruit (A) Brassicaceae (B) Capparidaceae (C) Fumariaceae (D) Papavaraceae Q.7 Which of the following reduces the transpiration rate when applied to aerial parts of plants? (A) Phosphon-D (B) Paraquat (C) Phenyl mercuric acetate (D) Valinomycin Q.8 A tube like membrane structure that forms the connection between the endoplasmic reticulum of neighboring cells through plasmodesmata is (A) Desmotubule XL-J (B) Desmosome (C) Dictyosome (D) Microtubule 1/4 GATE 2015 Q.9 BOTANY XL-J Which one of the followings is NOT a cryoprotectant for plant tissue? (A) Dimethyl sulfoxide (B) Glycerol (C) Ethylene glycol (D) Liquid nitrogen Q.10 Two similar holotypes are called (A) Monotype (B) Neotype (C) Isotype (D) Syntype Q. 11 Q. 20 carry two marks each. Q.11 A cross was made between AABBCCDDEE and aabbccddee. The resultants F1 were selfed. Applying Mendelian principle, PREDICT the proportion of phenotype showing all the recessive characters in F2 generation. (A) 1 64 Q.12 (B) 1 256 (C) 1 512 (D) 1 1024 Identify the CORRECT statements with respect to functioning of ecosystem. P. A food chain is a series of organisms, each one feeding on the organism succeeding it Q. Food web presents a complete picture of the feeding relationships in any given ecosystem R. In ecosystem, energy flows in unidirectional way, whereas nutrients flow in cyclic fashion S. In biogeochemical cycles, nutrients do not alternate between organisms and environment (A) P, Q Q.13 (B) P, R (D) Q, R Match the name of the diseases with their causal organisms. Disease P. Loose smut of wheat Q. Wart disease of potato R. Panama disease of banana S. Tikka disease of groundnut (A) P-6, Q-4, R-3, S-2 (C) P-4, Q-3, R-5, S-1 XL-J (C) R, S Causal Organism 1. Cercospora personata 2. Alternaria solani 3. Synchytrium endobioticum 4. Ustilago tritici 5. Fusarium oxysporum 6. Erwinia amylovora (B) P-4, Q-6, R-1, S-3 (D) P-2, Q-3, R-2, S-6 2/4 GATE 2015 Q.14 BOTANY XL-J Match the plant products with their sources and the plant parts from which they are obtained. Product Source P. Annatto Q. Cutch R. Henna S. Alizarin 1. Acacia catechu 2. Rubia tinctorum 3. Bixa orellana 4. Lawsonia inermis (A) P-3-ii, Q-4-i, R-2-iii, S-1-iv (C) P-2-ii, Q-1-iii, R-4-iv, S-3-i Q.15 i. Seed ii. Leaf iii. Root iv. Stem (B) P-3-i, Q-1-iv, R-4-ii, S-2-iii (D) P-4-ii, Q-3-iv, R-1-iii, S-2-i Match the floral structures with the families and representative plant species. Floral structure P. Gynostegium Q. Gynostemium R. Gynobasic style S. Gynophore Family 1. Orchidaceae 2. Lamiaceae 3. Capparidaceae 4. Asclepiadaceae (A) P-2-i, Q-3-iii, R-4-ii, S-1-iv (C) P-4-iii, Q-1-iv, R-2-i, S-3-ii Q.16 Plant part Plant i. Ocimum sanctum ii. Cleome gynandra iii. Calotropis procera iv. Vanilla planifolia (B) P-3-ii, Q-4-I, R-2-iii, S-1-iv (D) P-4-ii, Q-2-iii, R-1-iv, S-3-i Identify the INCORRECT statements with respect to plastid transformation. P. Antibiotic used for selection of trasplastomic plant is spectinomycin Q. Chances of gene escape from transplastomic plants are high R. Microprojectile bombardment is the method of DNA delivery S. Levels of transgene expression are low (A) P, R (B) P, Q (C) Q, S (D) R, S Q.17 Which of the following statements are TRUE with regard to the similarities between Crassulacean Acid Metabolism (CAM) and C4 cycle? P. Stomata open during night and remain closed during the day Q. PEPcase is the carboxylating enzyme to form C4 acid R. C4 acid is decarboxylated to provide CO2 for C3 cycle S. Kranz anatomy is predominant in both CAM and C4 plants (A) P, S XL-J (B) Q, R (C) P, Q (D) R, S 3/4 GATE 2015 BOTANY XL-J Q. 18 With respect to germination of seeds, the CORRECT sequence of events is P. Q. R. S. Seed imbibes water Mobilization of starch reserve to embryo Diffusion of gibberellin from embryo to aleurone layer Synthesis of -amylase in the aleurone layer (A) P, Q, S, R (C) R, P, Q, S Q.19 (B) P, R, S, Q (D) R, Q, P, S Identify the CORRECT statements with regard to the function of plant hormones P. ABA is synthesized from chorismate and promotes viviparous germination Q. Auxin induces acidification of cell wall followed by turgour-induced cell expansion R. Gibberellin-reponsive genes become activated by the repression of DELLA protein S. Cytokinin regulates the G2 to M transition in the cell cycle (A) P, Q Q.20 (B) Q, R (C) Q, S (D) P, R Statements given below are either TRUE (T) or FALSE (F). Find the correct combination. P. Somatic embryo is unipolar in nature Q. Heterokaryon can be selected using a fluorescence-activated cell sorter (FACS) R. The term somaclonal variation is coined by Larkin and Scowcroft S. Differentiation of shoot buds during in vitro culture is known as somatic embryogenesis (A) P-T, Q-F, R-T, S-F (C) P-T, Q-F, R-F, S-T (B) P-F, Q-T, R-F, S-T (D) P-F, Q-T, R-T, S-F END OF THE QUESTION PAPER XL-J 4/4

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