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For each glucose molecule broken down, there are______________number of reduced coenzymes to be oxidized.

  • A.12
  • B.8
  • C.6
  • D.4

Answer: A

Correct answer: 12

Per glucose, complete oxidation yields 10 NADH - 2 from glycolysis, 2 from pyruvate dehydrogenase and 6 from the TCA cycle - and 2 FADH2, making 12 reduced coenzymes in all. Each is then reoxidised by the electron transport chain.

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