The final acceptor of electrons in the respiratory chain is?
Correct answer: D. Oxygen
- A. CO₂
- B. ATP
- C. Water
- D. Oxygen
Explanation
In cellular respiration, the final acceptor of electrons in the respiratory chain is oxygen (O₂). Oxygen accepts electrons and hydrogen ions at the end of the chain to form water, allowing the continuous flow of electrons and sustained ATP production. Other options-carbon dioxide, water, and ATP-either act as by-products or energy carriers but do not serve as electron 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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