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Q.21 In a simple microscope, _______.(A) a lens with negative power is used(B) the focal length of the lens is less than the least distance for clear vision(C) the focal […]

Q.20 Which one of the following statements is a correct description of modes of action of taxol and colchicine? (A) Taxol causes DNA damage and colchicine prevents microtubule formation (B) […]

Q.19 Which one of the following parameters changes upon doubling the enzyme concentration? (A) KM (B) V max (C) k cat (D) Keq Vmax changes when enzyme concentration doubles in […]

Q.18 The following reaction is an example of ___________. (A) enolization (B) racemization (C) isomerization (D) epimerization The given reaction is an example of enolization, i.e. keto–enol tautomerization of a carbonyl […]

Q.17 The free energy required to synthesize a mixed anhydride bond of 1,3-bisphosphoglycerate is generated by the oxidation of ________. (A) an aldehyde to acid (B) an alcohol to acid […]

Q.16 Solutions of the following peptides are prepared separately at a concentration of 1 mM. Among these four, which one has the highest A280? (A) Ser-Val-Trp-Asp-Phe-Gly-Tyr-Trp-Ala (B) Gln-Leu-Glu-Phe-Thr-Leu-Asp-Gly-Tyr (C) Met-Gly-Val-Ileu-Asp-Ser-Ala-Trp-His […]

Q.15 Which one of the following modifications occurs both on DNA and protein? (A) ADP-ribosylation (B) Methylation (C) Sumoylation (D) Ubiquitination Methylation occurs on both DNA and proteins, making it […]

Q.14 The evolution of eyes in octopus and in human is an example of ________. (A) divergent evolution (B) convergent evolution (C) adaptive radiation (D) genetic drift The evolution of […]

Q.13 Simplify sin A / (1 + cos A) + (1 + cos A) / sin A . (A) 2 sec A (B) 2 cosec A (C) sec A (D) […]

Q.12 In how many ways can one write the elements 1, 2, 3, 4 in a sequence x₁, x₂, x₃, x₄ with x_i ≠ i ∀ i ? (A) 9 […]