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74. Deficiency of the enzyme phenylalanine hydroxylase causes Phenylketonuria. Phenylalanine hydroxylase converts phenylalanine to: (A) Tryptophan (B) Alanine (C) Tyrosine (D) Threonine Phenylalanine Hydroxylase Converts Phenylalanine into Which Amino Acid? […]
73. The following reaction is an example of . (A) enolization (B) racemization (C) isomerization (D) epimerization Is the Conversion of Dihydroxyacetone Phosphate to Glyceraldehyde-3-Phosphate an Isomerization Reaction? Correct Answer […]
72. Consider an ATP synthase having twelve C-rings to sense proton motive force. The average number of protons required per ATP synthesis is ________. How to Calculate the Number of […]
71. Which one of the following bonds is formed at the branch point in glycogen? (A) α-1,4 glycosidic bond (B) α-1,6 glycosidic bond (C) β-1,4 glycosidic bond (D) β-1,6 glycosidic […]
![70. The pH of gastric juice in the stomach is 2.0. However the pH inside the cells that line the stomach is 7.0. For transport of protons from inside the cell to the stomach, the free energy change (∆G) in kJmol–1at 37oC is [Assume Universal Gas constant R = 8.314 Jmol–1K–1]](https://www.letstalkacademy.com/wp-content/uploads/2026/06/1782482036919-28d3b66b-2845-4f57-a8dd-cdc4734ea5c7_70.jpg)
70. The pH of gastric juice in the stomach is 2.0. However the pH inside the cells that line the stomach is 7.0. For transport of protons from inside the […]
69. An enzyme preparation containing 10 mg/ml protein shows a specific activity of 50 U/mg. The initial velocity of reaction in a standard 1 ml reaction mixture containing 10 µl […]
68. Which one of the following options shows the correct pairing of the enzyme with its corresponding application? P.Papain i. Gluten complex […]
67. An enzyme shows highest activity in the pH range 2.0 – 3.0. At pH 4.0 and pH 7.0, the enzyme exhibits 50% and 1%, respectively, of its highest activity. […]
66. Cephalin, a biological surfactant, is (A) choline phosphoglyceride (B) ethanolamine phosphoglyceride (C) glycosphingolipid (D) sphingolipid What is Cephalin? Complete Explanation of Biological Surfactant and Phospholipids Correct Answer (B) Ethanolamine […]
65. A 50-amino acid residue stretch of a globular protein adopts an extended structure containing a true α-helix of 24 residues and β-strand of 26 residues. The total length of […]
