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22. Which one of the following amino acid substitutions is likely to cause the largest change in protein conformation? (A) Phe → Ile (B) Ser → Thr (C) Gln → […]

21. The formation of a carbocation, also called an oxonium ion, occurs during the reaction catalyzed by (A) aldolase (B) lysozyme (C) ribonuclease A (D) ) carboxypeptidase The correct answer […]

20. Proteolytic enzymes are usually biosynthesized as large, inactive precursors known as (A) holoenzymes (B) ribozyme (C) zymogens (D) apoenzymes Proteolytic enzymes are biosynthesized as large, inactive precursors called zymogens […]

19. Ribulose-5-phosphate epimerase is involved in which one of the following processes? (A) Glycolysis (B) TCA cycle (C) Glycosylation (D) Pentose phosphate pathway Ribulose-5-phosphate epimerase, also known as ribulose-phosphate 3-epimerase […]

18. Oxidation of one molecule of glucose via the glycerol-phosphate shuttle produces (A) 32 molecules of ATP (B) 32 molecules of NADPH (C) 30 molecules of ATP (D) 30 molecules […]

17. Which one of the following bases is NOT found in the T-arm of an aminoacyl t-RNA? (A) Dihydrouridine (B) Pseudouridine (C) Uracil (D) Guanine The correct answer is (D) Guanine. […]

16. Which one of the following small molecules is a prerequisite for fatty acid oxidation? (A) Inositol (B) Choline (C) Carnitine (D) Glycerol Carnitine is the prerequisite small molecule for […]

Q.15 For the process, H2O(l) ⇌ H2O(s) at 0 o C and 1 atm, the correct statement is (A) ΔSsystem = 0 (B) ΔStotal > 0 (C) ΔStotal = 0 […]

Q.14 The molar enthalpy of vaporization for a liquid (normal boiling point = 78.3 oC is 39 kJ mol−1. If the liquid has to boil at 25 oC, the pressure […]

Q.13 The order of resonance energy for the following molecules is (A) (1) > (3) > (2) > (4)   (B) (1) > (3) > (4) > (2) (C) (1) > […]