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, oxygen accepts electrons and combines with protons to form water. Carbon dioxide is a product of cellular respiration, not an electron acceptor. FADH₂ and NADH are electron carriers that donate electrons to the electron - transport chain, not the final electron acceptors.

Answer:

oxygen