alleryIn the electron-transport chain of aerobic respiration, the final electron acceptor is
ANAD⁺, recycled from glycolysis only
BFAD, bound inside complex II
Ccytochrome c, between complexes III and IV
Dmolecular oxygen, forming water
Answer & Solution
Correct answer: D. molecular oxygen, forming water
Electrons travel down the ETC and end up on O₂, which combines with H⁺ to form H₂O.
NAD⁺ and FAD are intermediate carriers
cytochrome c is a mobile carrier inside the chain.
Without O₂ the chain backs up, blocking the cycles upstream.
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