The final step of aerobic respiration is oxidative phosphorylation, which consist of two sub phases, electron transport chain and chemiosmosis. which step requires oxygen? What is the role of oxygen in this step? which of these two steps creates ATP?

1 answer

The step of aerobic respiration that requires oxygen is the electron transport chain. Oxygen plays a crucial role in this step as the final electron acceptor. It accepts the electrons passed down the electron transport chain and combines with hydrogen ions to form water. This process is essential for the production of ATP.

The electron transport chain creates ATP through a process called chemiosmosis. As the electrons are passed along the chain, hydrogen ions are pumped across the inner mitochondrial membrane, creating an electrochemical gradient. The energy stored in this gradient is then used by the ATP synthase enzyme to produce ATP through the process of oxidative phosphorylation.