If an aerobic organism stopped taking in oxygen, which process would stop first? A) the splitting of glucose into two pyruvates B) the reduction of NAD⁺ to NADH C) the release of carbon dioxide D) electron transfer phosphorylation E) the initiation of the Krebs cycle

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Quizplus · Accepted Answer

Electron transfer phosphorylation, which occurs in the electron transport chain, is directly dependent on oxygen as the final electron acceptor. Without oxygen, this process would halt first, affecting ATP production.

If an Aerobic Organism Stopped Taking in Oxygen, Which Process