Question

which is the final electron acceptor in the electron transport chain of cellular respiration?
nadh
fadh₂
oxygen
carbon dioxide

Explanation:

In cellular respiration's electron transport chain, electrons are passed through a series of carriers. At the end, oxygen (\(O_2\)) accepts electrons and combines with protons (\(H^+\)) to form water (\(H_2O\)). NADH and \(FADH_2\) are electron donors (they donate electrons to the chain), not acceptors. Carbon dioxide (\(CO_2\)) is a product of earlier stages of cellular respiration (like the citric acid cycle) but not the final electron acceptor in the electron transport chain.

Answer:

oxygen