Answer: C
Explanation:
Chemiosmosis couples electron transport chain to ATP synthesis. NADH and FADH shuttle high-energy electrons extracted from food during glycolysis and citric acid cycle to an electron transport chain built into the inner mitochondrial membrane.
In the electron transport chain, electron are transport and pumping of electrons create an H+ gradient across the membrane.
During Chemiosmosis, the protons flow back down their gradient via ATP synthase, which is built into the membrane nearby. The ATP synthase harnesses the proton-motive force to phosphorylate ADP, forming ATP.
Therefore ETC and Chemiosmosis make up oxidative phosphorylation
