Compared with the 36 to 38 ATP of aerobic respiration, anaerobic respiration in a human muscle cell yields
Correct answer: C. 2 ATP per glucose
- A. no ATP at all
- B. 4 ATP per glucose
- C. 2 ATP per glucose
- D. 24 ATP per glucose
Explanation
Only glycolysis runs without oxygen, giving a net gain of 2 ATP, while the Krebs cycle and electron transport chain need oxygen to continue. This is why muscles tire quickly when they have to rely on lactate fermentation.
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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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