The immediate energy source that drives ATP synthesis by ATP synthase during oxidative phosphorylation is the
A) oxidation of glucose and other organic compounds.
B) flow of electrons down the electron transport chain.
C) affinity of oxygen for electrons.
D) H⁺ concentration across the membrane holding ATP synthase.
E) transfer of phosphate to ADP.

Question

Quizplus · Accepted Answer

The H⁺ concentration across the membrane holding ATP synthase drives ATP synthesis by ATP synthase during oxidative phosphorylation. This is because the ATP synthase uses the energy from the flow of H⁺ ions down their electrochemical gradient, from an area of high concentration to an area of low concentration, to synthesize ATP.

The Immediate Energy Source That Drives ATP Synthesis by ATP