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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 […]

Q.11 Let a = √(5+1)/2 and b = √(5-1)/2. Then, limn→∞ (an + bn)/(an – bn) (A) is 1 (B) is ½ (C) is 0 (D) does not exist Limit […]

Q.10 The orbital angular momentum of hydrogen atom in the ground state is ________. (A) 0 (B) h/2π (C) h/2 (D) h The orbital angular momentum hydrogen atom ground state […]

Q.9The technique that involves impacting samples with electrons is _______. (A) NMR spectroscopy (B) ESI mass spectrometry (C) IR spectroscopy (D) UV-vis spectroscopy Electron Impact (EI) ionization in mass spectrometry […]