Phosphofructokinase is inhibited by:
Correct answer: C. High concentration of ATP
- A. High concemration of NADH
- B. Low concentration of citrate
- C. High concentration of ATP
- D. Pyruvate decarboxylase
Explanation
Phosphofructokinase is a key regulatory enzyme in the glycolysis pathway, and it is inhibited by high concentrations of ATP. When the cell has sufficient ATP, it signals that there is no need to continue breaking down glucose for energy, and phosphofructokinase is inhibited to prevent the production of more ATP. This helps to conserve cellular resources and prevent the buildup of excess ATP.
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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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