Question

In the mitochondria, NADH donates its electrons to NADH-Q oxidoreductase, and from there the electrons move...

In the mitochondria, NADH donates its electrons to NADH-Q oxidoreductase, and from there the electrons move through the electron transport chain.

a. Explain why this process requires aerobic conditions.

b. In what pathway is the bulk of NADH and FADH2 produced that feeds the electron

transport chain?

What is the consequence for this pathway under anaerobic conditions and why?

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Answer #1

A. This process requires oxygen as the final protein complex of ETC donates a pair of electrons to the oxygen, as oxygen is the final electrons acceptor. To continue this pricees and formation of ATP oxygen is always required.

B. In KREBS cycle or citric acid cycle bulk of NADH and FADH2 are produced which are fed in ETC for generation of ATP.

In anaerobic condition there is no final electron acceptor is present so the ETC discontinues. So no generation of ATP.

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