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GATE 2015 : Life Sciences [Section K]

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GATE 2015 MICROBIOLOGY XL-K K: MICROBIOLOGY Q. 1 Q. 10 carry one mark each. Q.1 Lophotrichous bacteria have (A) one flagellum (B) a cluster of flagella at one or both ends (C) flagella that are spread evenly over the whole surface (D) a single flagellum at each pole Q.2 In aerobic respiration, the final electron acceptor is (A) hydrogen Q.3 (B) nitrogen (C) sulfur (D) oxygen A process in which fatty acids are shortened by two carbons at a time resulting in release of acetylCoA is known as (A) photophosphorylation (C) -oxidation Q.4 (B) carboxylation (D) oxidative phosphorylation Limulus Amoebocyte Lysate (LAL) assay is used to identify the presence of (A) endotoxin Q.5 (B) exotoxin (C) anthrax toxin Match scientists in Group I with terms related to their major scientific contributions in Group II Group I (P) Sanger (Q) Watson and Crick (R) Waksman (S) Bordet Group II (i) DNA double helix structure (ii) DNA sequencing (iii) Complement (iv) Streptomycin (v) Immune tolerance (A) P-iii, Q-iv, R-ii, S-i (B) P-ii, Q-iii, R-iv, S-v (C) P-iv, Q-i, R-ii, S-v Q.6 (D) P-ii, Q-i, R-iv, S-iii Base-pair substitutions caused by the chemical mutagen ethyl methane sulfonate are a result of (A) hydroxylation Q.7 (D) tetanus toxin (B) alkylation (C) deamination (D) intercalation The classical way of representing taxonomic hierarchy of living organisms in ASCENDING ORDER is (A) genus, species, class, order, family (C) species, genus, family, order, class Q.8 (B) species, genus, order, family, class (D) genus, species, order, class, family Of the following, the most effective method to kill bacterial endospores is (A) moist heat sterilization (C) filtration XL-K (B) UV irradiation (D) pasteurization 1/3

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