In aerobic respiration, the terminal electron acceptor in the electron transport chain is
oxygen (O ).
The process of aerobic respiration involves the transfer of electrons through a series of protein complexes in the inner mitochondrial membrane.
At the end of the electron transport chain, oxygen (O
) accepts the electrons and combines with protons (H
) to form water (H
O).
This is a crucial step as it allows the continuation of the electron transport chain, enabling ATP production through oxidative phosphorylation.
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NADH (B) is an electron carrier that donates electrons earlier in the chain but is not the terminal acceptor.
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Water (A) is the product formed when oxygen accepts electrons, but it is not the electron acceptor itself.
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Cytochrome-c (D) is a carrier molecule that helps transfer electrons within the electron transport chain but does not act as the terminal acceptor.
Therefore, the correct terminal electron acceptor is
oxygen (O ), which accepts the electrons at the end of the chain.
Final Answer: