ATP molecules are consumed during which process?
Correct answer: A. Glycolysis
- A. Glycolysis
- B. Light dependent phase
- C. Krebs cycle
- D. None
Explanation
Glycolysis is the correct answer because it begins with the investment of 2 ATP molecules to phosphorylate glucose, which is necessary to drive the subsequent reactions leading to pyruvate production. This initial consumption of ATP is crucial for the glycolytic pathway to proceed.The light-dependent phase of photosynthesis, on the other hand, is involved in ATP production, not consumption, as it captures light energy to generate ATP and NADPH.The Krebs cycle is mainly involved in the extraction of energy from acetyl-CoA, resulting in the production of ATP, NADH, and FADH2 without directly consuming ATP in its reactions. Therefore, glycolysis is the only process among the options where ATP consumption is an integral part of its mechanism.
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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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