MDCAT Biology MCQ #289

A cell has reached a high energy state with an abundance of ATP in the cytosol. Which enzyme's inhibition will slow down the glycolytic flux?

MDCAT Biology MCQ #289

  1. Question 1

    Q1. A cell has reached a high energy state with an abundance of ATP in the cytosol. Which enzyme's inhibition will slow down the glycolytic flux?

    • A) Hexokinase
    • B) Phosphofructokinase
    • C) Pyruvate kinase
    • D) Aldolase

    Answer: Phosphofructokinase

    Explanation: ATP acts as an allosteric inhibitor of phosphofructokinase; hexokinase is tempting but it acts at the first, non-committing step.