Removal of high-energy phosphate by two ADP molecules produces two ATP molecules and two pyruvate molecules in step no. _ of glycolysis.
Correct answer: D. 10
- A. 7
- B. 8
- C. 9
- D. 10
Explanation
Step 10 of glycolysis is crucial, as it involves the conversion of phosphoenolpyruvate (PEP) into pyruvate, catalyzed by the enzyme pyruvate kinase. This reaction is coupled with the production of ATP from ADP, marking the final step of glycolysis, where energy is extracted in the form of ATP. Options 7, 8, and 9 are incorrect, as they correspond to earlier steps in glycolysis that do not result in the production of pyruvate and ATP simultaneously.
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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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