[Campbell Biology P.232] Based on Figure 9.19 and the accompanying text, which molecules cor... | Practice Question

Based on Figure 9.19 and the accompanying text, which molecules correctly describe the regulation of phosphofructokinase activity?

  • A: AMP stimulates phosphofructokinase.
  • B: ATP inhibits phosphofructokinase.
  • C: Citrate inhibits phosphofructokinase.
  • D: Glucose stimulates phosphofructokinase.
  • E: Pyruvate stimulates phosphofructokinase.

Explanation

Figure 9.19 clearly shows that AMP 'Stimulates' phosphofructokinase, while ATP and Citrate 'Inhibit' it. The accompanying text also confirms this regulation: 'It is stimulated by AMP derived from ADP but is inhibited by ATP and by citrate.'