The synthesis of ATP by oxidative phosphorylation, using the energy released by movement of protons across the membrane down their electrochemical gradient, is an example of
A) active transport.
B) an endergonic reaction coupled to an exergonic reaction.
C) a reaction with a positive ΔG .
D) osmosis.
E) allosteric regulation.

Question

Quizplus · Accepted Answer

The synthesis of ATP via oxidative phosphorylation is a coupled reaction where the exergonic movement of protons down their electrochemical gradient powers the endergonic formation of ATP. Therefore, it is an example of an endergonic reaction coupled to an exergonic reaction.

The Synthesis of ATP by Oxidative Phosphorylation, Using the Energy