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64. The following polypeptide chain was sequentially treated with dithiothreitol, cyanogen bromide, and trypsin. Phe-Trp-Lys-Tyr-Met-Gly-Ala-Cys-Cys-Pro-Met-Asp-Gly-Arg-Phe-Ala-Gly-Trp The total number of fragments expected at the end of complete digestion of the polypeptide […]
63. An enzyme catalyzes the conversion of 4 × 10-4 M substrate into product at a rate of 20 µM/min. If the Km value for the enzyme is 2 × […]
62. A receptor binds to its ligand with a dissociation constant Kd = 10-8 M. The concentration of the ligand required to occupy 10% of the receptors would be 10-x […]
61. The net charge on the following peptide at pH 7.0 is ________ . Val-Asp-Asn-Lys-Ser-Ile How to Calculate the Net Charge of a Peptide at pH 7? Correct Answer 0 […]
60. Which of the following are NOT true for photosynthesis? (A) Reduction of CO2 and H2O (B) Oxidation of CO2 and H2O (C) Reduction of CO2 and oxidation of H2O […]
59. Which of the following statements are TRUE for cellulose? (A) Cellulose serves a structural role (B) Cellulose is a branched polysaccharide (C) Cellulose is a homopolysaccharide composed of (α1→4) […]
58. In an experiment conducted in the dark, isolated chloroplasts are kept in buffer (pH 4.0) at 4 °C until their internal pH is equal to 4.0. Then, they are […]
![57. Determine the correctness or otherwise of the following Assertion [a] and Reason [r]. Assertion: In the process of ATP synthesis in oxidative phosphorylation, ATP synthase is not a part of electron transport chain on inner mitochondrial membrane. Reason: ATP synthase is coupled to electron transport chain through proton motive force. (A) [a] and [r] are true and [r] is the correct reason for [a] (B) [a] and [r] are true but [r] is not the correct reason for [a] (C) both [a] and [r] are false (D) [a] is false but [r] is true](https://www.letstalkacademy.com/wp-content/uploads/2026/06/1782482036919-28d3b66b-2845-4f57-a8dd-cdc4734ea5c7_57.jpg)
57. Determine the correctness or otherwise of the following Assertion [a] and Reason [r]. Assertion: In the process of ATP synthesis in oxidative phosphorylation, ATP synthase is not a part […]
56. The KM and vmax of an enzyme are 4 mM and 0.1 nMh-1 respectively. In the presence of 1.5 mM inhibitor, the K’M and v’max of the enzyme are […]
![55. The standard oxidation potentials for oxidation of NADH and H20 are + 0.315 V and -0.815 V, respectively. The standard free energy for oxidation of I mole of NADH by oxygen under standard conditions (correct to l decimal place) is kJ. [Faraday Constant is 96500 C mole*']](https://www.letstalkacademy.com/wp-content/uploads/2026/06/1782482036919-28d3b66b-2845-4f57-a8dd-cdc4734ea5c7_55.jpg)
55. The standard oxidation potentials for oxidation of NADH and H20 are + 0.315 V and -0.815 V, respectively. The standard free energy for oxidation of I mole of NADH […]
