Each molecule of NADH2 entering the electron transport chain produces:
Correct answer: D. Three ATPs
- A. Four ATPs
- B. Two ATPs
- C. One ATP
- D. Three ATPs
Explanation
Three ATPs: This is the correct option. Each NADH molecule generally leads to the synthesis of around three ATP molecules in the electron transport chain. However, the exact ATP yield can vary based on cellular conditions and ATP production efficiency. Therefore, each NADH molecule typically results in the production of approximately three ATP molecules. Options A, B, and C are incorrect because NADH does not directly produce four, two, or one ATPs, respectively.
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About Cellular Respiration
Cellular respiration releases energy from glucose through glycolysis, the link reaction, the Krebs cycle and the electron transport chain, producing ATP. The pathway differs in oxygen availability: aerobic respiration uses oxygen and yields more ATP, while anaerobic respiration produces much less ATP and forms lactic acid in muscles or ethanol and carbon dioxide in yeast.
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