The final acceptor of electrons in the respiratory chain is
Correct answer: B. Oxygen
- A. Cytochrome a
- B. Oxygen
- C. Cytochrome a3
- D. Cytochrome c
Explanation
In the electron transport chain, oxygen serves as the final electron acceptor. It has a high affinity for electrons due to its electronegativity, and it accepts electrons from the chain to form water. This step is crucial for maintaining the flow of electrons and allowing ATP production. Other components like Cytochrome a, Cytochrome a3, and Cytochrome c are involved in electron transfer, but they are not the ultimate acceptors.
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About Bioenergetics
Cellular respiration explains how cells release energy from glucose through glycolysis, the link reaction, Krebs cycle and electron transport chain. It includes ATP production, substrate-level and oxidative phosphorylation, aerobic versus anaerobic respiration, and the roles of mitochondria, oxygen and fermentation in energy transfer.
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