ATP are consumed during___________?
Correct answer: A. Glycolysis
- A. Glycolysis
- B. Kreb's cycle
- C. Light dependent phase
- D. none of these
Explanation
ATP is consumed during the investment phase of glycolysis, where 2 ATP per glucose are used to phosphorylate intermediates before ATP is produced later. Students may choose the Krebs cycle because it is part of respiration, but the cycle produces ATP or GTP rather than consuming ATP in the usual pathway.
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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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