The last part of aerobic respiration is known as oxidative phosphorylation. In this process, ADP is phosphorylated to generate ATP using the energy that was released from the oxidation (the main substance that was oxidized being NADH + H+). The energy from this is released in a series of small steps and then carried out by the electron transport chain. The method used to couple the release of energy by oxidation to ATP production is known as chemiosmosis, where H+ moves across the inner mitochondrion membrane down the concentration gradient releasing energy needed for ATP synthase (enzyme) to form ATP.
2. Describe the role of oxygen in the ETC.
Oxygen is the "final electron acceptor." As electrons (usually represented as Hydrogen atoms) are passed down the chain, they lose their energy in the making af ATP by phosphorylation.
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