MDCAT Biology MCQ #222

During the initial preparatory phase of glycolysis in a muscle cell, which specific chemical event must occur first to activate the glucose molecule?

MDCAT Biology MCQ #222

  1. Question 1

    Q1. During the initial preparatory phase of glycolysis in a muscle cell, which specific chemical event must occur first to activate the glucose molecule?

    • A) Phosphorylation of glucose
    • B) Reduction of NAD+
    • C) Oxidation of pyruvate
    • D) Cleavage of fructose-1,6-bisphosphate

    Answer: Phosphorylation of glucose

    Explanation: Glycolysis begins with glucose phosphorylation using ATP. Option B is incorrect because NADH is produced later during the oxidation of G3P.