AP BIOLOGY

Detailed explanation-1: -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-2: -In aerobic respiration, the final electron acceptor (i.e., the one having the highest or most positive redox potential) at the end of the ETS is an oxygen molecule (O2). This is reduced to water (H2O) by the final ETS carrier complex, which includes a terminal oxidase and usually, a cytochrome.

Detailed explanation-3: -The final electron acceptor is oxygen (O2), it has a high electronegativity and accepts low-energy electrons. Hydrogen is combined with oxygen, forming water as the final product.

Detailed explanation-4: -The final electron acceptor is oxygen (O2). Oxygen has a high electronegativity; thus, oxygen’s high affinity for electrons makes it an ideal acceptor for low-energy electrons. With the electrons, hydrogen is added to oxygen forming water as the final product.

Detailed explanation-5: -The reduced chemical compounds are oxidized by a series of respiratory integral membrane proteins with sequentially increasing reduction potentials, with the final electron acceptor being oxygen (in aerobic respiration) or another chemical substance (in anaerobic respiration).