What is the product of the ETC in animals?
Correct answer: C. Water
- A. Oxygen
- B. Carbon dioxide
- C. Water
- D. All of these
Explanation
The electron transport chain (ETC) is the final stage of cellular respiration. In this process, oxygen acts as the final electron acceptor, combining with electrons and protons to form water. Therefore, water is the main product of the ETC. Oxygen is not a product but a reactant, and carbon dioxide is released during the Krebs cycle, not the ETC. Hence, the correct answer is Water.
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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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