AP BIOLOGY

Detailed explanation-1: -Oxygen is required in the cellular respiration in the electron transporter chain. It serves as the final electron acceptor of the electron transport chain facilitating the movement of electrons down the chain hence producing the ATP or adenosine triphosphate.

Detailed explanation-2: -Oxygen is the final electron acceptor in this respiratory cascade, and its reduction to water is used as a vehicle by which to clear the mitochondrial chain of low-energy, spent electrons. The enzyme that catalyzes this process, cytochrome oxidase, spans the mitochondrial membrane.

Detailed explanation-3: -Oxidative phosphorylation. At the end of the electron transport chain, oxygen accepts electrons and takes up protons to form water.

Detailed explanation-4: -Oxygen is the terminal electron acceptor in the mitochondrial electron transport chain and therefore is required for the generation of energy through oxidative phosphorylation.

Detailed explanation-5: -The raw materials required for aerobic cellular respiration are respiratory substrates (glucose, fatty acids, amino acids, or organic acids) and oxygen but in the case of anaerobic respiration raw material is respiratory substrate only.