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Home » Biochemistry MCQ

Biochemistry MCQ

Total MCQ:
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71 Which of the following is an inhibitor of Complex I in the ETC?

  • A) Rotenone
  • B) Malonate
  • C) Antimycin
  • D) Cyanide
View Answer & Discuss

72 What is the function of the glycerol 3-phosphate 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
View Answer & Discuss

73 Which of the following is a heme-containing protein in the ETC?

  • A) Cytochrome c (Cyt c)
  • B) Coenzyme Q (CoQ)
  • C) Flavin mononucleotide (FMN)
  • D) NADH
View Answer & Discuss

74 What is the function of the F0 component in the mitochondria?

  • A) To generate ATP in the mitochondria
  • B) To transport NADH from the cytoplasm to the mitochondria
  • C) To form a proton channel in the inner mitochondrial membrane
  • D) To synthesize glucose in the liver
View Answer & Discuss

75 Which of the following is an uncoupler of oxidative phosphorylation?

  • A) Dinitrocresol
  • B) Oligomycin
  • C) Rotenone
  • D) Cyanide
View Answer & Discuss

76 What is the role of cytochrome c reductase in the ETC?

  • A) To transfer electrons from NADH to CoQ
  • B) To transfer electrons from CoQ to cytochrome c
  • C) To transfer electrons from cytochrome c to oxygen
  • D) To generate ATP
View Answer & Discuss

77 Which complex in the ETC is known as succinyl-CoQ reductase?

  • A) Complex I
  • B) Complex II
  • C) Complex III
  • D) Complex IV
View Answer & Discuss

78 What is the primary function of the electron transport chain?

  • A) To synthesize glucose
  • B) To generate ATP
  • C) To transport electrons and pump protons
  • D) To produce NADH
View Answer & Discuss

79 Which of the following compounds is known to block Complex IV in the ETC?

  • A) Oligomycin
  • B) Cyanide
  • C) Malonate
  • D) Rotenone
View Answer & Discuss

80 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
View Answer & Discuss
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