In oxidative phosphorylation, energy for the synthesis of ATP is directly obtained from the

Question

Quizplus · Accepted Answer

In oxidative phosphorylation, the energy for the synthesis of ATP is obtained by the movement of hydrogen ions through channels in the inner mitochondrial membrane, from an area of high concentration in the intermembrane space to an area of low concentration in the mitochondrial matrix. This creates an electrochemical gradient that is used by ATP synthase to generate ATP.

All of the other choices describe processes that are involved in cellular respiration but do not directly provide the energy for ATP synthesis in oxidative phosphorylation. Oxygen molecules do not split to provide energy, but instead serve as final electron acceptors in the electron transport chain. Glucose is broken down in glycolysis and the citric acid cycle to produce electron carriers that enter the electron transport chain. The combination of hydrogen and oxygen to form water is an exergonic process that releases energy, but this energy is not used to produce ATP in oxidative phosphorylation. The oxidation of acetyl-CoA occurs in the citric acid cycle and also generates electron carriers that enter the electron transport chain.

In Oxidative Phosphorylation, Energy for the Synthesis of ATP Is