The hydrogen atoms removed from glucose during glycolysis are accepted by
Correct answer: A. NAD, forming NADH
- A. NAD, forming NADH
- B. oxygen directly
- C. ATP
- D. carbon dioxide
Explanation
NAD acts as the hydrogen acceptor in glycolysis, keeping the pathway going by removing electrons and carrying them onwards. Oxygen only accepts electrons at the very end of the chain, so it never takes hydrogen directly from glycolysis.
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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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