- A) To synthesize glucose
- B) To generate ATP
- C) To transport electrons and pump protons
- D) To produce NADH
Biochemistry MCQ
Total MCQ: 92
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72 Which of the following compounds is known to block Complex IV in the ETC?
- A) Oligomycin
- B) Cyanide
- C) Malonate
- D) Rotenone
73 How many ATP can be generated from one molecule of NADH in the ETC?
- A) 1 ATP
- B) 2 ATP
- C) 3 ATP
- D) 4 ATP
74 What is the major consumer of O2 in mammalian cells?
- A) Electron transport chain (ETC)
- B) Citric acid cycle
- C) Glycolysis
- D) Fatty acid synthesis
75 What is the role of the F1 component in the mitochondria?
- A) To form a proton channel
- B) To synthesize ATP
- C) To transport NADH
- D) To transfer electrons
76 What is the function of the malate shuttle?
- A) To generate ATP in the mitochondria
- B) To transport NADH from the cytoplasm to the mitochondria
- C) To transport FADH2 from the mitochondria to the cytoplasm
- D) To synthesize glucose in the liver
77 Which of the following is NOT a function of uncouplers?
- A) Generating heat
- B) Inhibiting ATP synthesis
- C) Increasing proton gradient
- D) Allowing oxidation without phosphorylation
78 Which of the following is a mobile electron carrier in the ETC?
- A) Coenzyme Q (CoQ)
- B) Cytochrome c (Cyt c)
- C) Flavin mononucleotide (FMN)
- D) All of the above
79 In the malate shuttle, reducing equivalents from NADH are accepted by which compound in the cytoplasm?
- A) Aspartate
- B) Malate
- C) Dihydroxyacetone phosphate
- D) Oxaloacetate
80 What is the final recipient of electrons in the ETC?
- A) Oxygen (O2)
- B) Water (H2O)
- C) ATP
- D) NADH