The final acceptor of electrons in aerobic respiration is
- A. water
- B. carbon dioxide
- C. molecular oxygen
- D. NAD
Explanation
Oxygen takes the electrons at the end of the chain and combines with protons to form metabolic water, which is why respiration stops within seconds when oxygen is cut off. Water is therefore the product, not the acceptor, which is the trap in this question. NAD is an intermediate carrier that passes electrons on rather than holding them.
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