The energy source that makes oxidative phosphorylation possible comes from A)phosphate group transfers from ATP. B)electrons transferred from NADPH. C)electrons transferred from NADH. D)electrons removed from CO₂ during its oxidation.

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Quizplus · Accepted Answer

The energy source for oxidative phosphorylation is the transfer of electrons from NADH and FADH2, which were produced during the earlier stages of cellular respiration (glycolysis and the citric acid cycle). These electrons are transported through the electron transport chain, generating a proton gradient that is used to synthesize ATP. NADPH is not directly involved in oxidative phosphorylation, and phosphate group transfers from ATP occur during substrate-level phosphorylation, which is separate from oxidative phosphorylation. CO₂ is not a known molecule in cellular respiration.

The Energy Source That Makes Oxidative Phosphorylation Possible Comes from