What occurs during the process known as oxidative phosphorylation? A) NADH produced during the citric acid cycle is oxidized. B) FADH₂ produced during the citric acid cycle is oxidized. C) ADP is phosphorylated to make ATP. D) Oxygen is reduced to water. E) All of the above processes occur.

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Quizplus · Accepted Answer

During oxidative phosphorylation, all of the above processes occur. NADH and FADH₂ produced during the citric acid cycle are oxidized, leading to the transfer of electrons to the electron transport chain. This results in the reduction of oxygen to water, while also generating a proton gradient across the inner mitochondrial membrane. The energy from this gradient is used to phosphorylate ADP and create ATP. Therefore, oxidative phosphorylation is the final stage of cellular respiration, which produces the majority of ATP in eukaryotic cells.

What Occurs During the Process Known as Oxidative Phosphorylation