MDCAT Biology MCQ #580

In a muscle cell, what is the primary source of energy for cross-bridge cycling during a high-intensity, short-duration activity?

MDCAT Biology MCQ #580

  1. Question 1

    Q1. In a muscle cell, what is the primary source of energy for cross-bridge cycling during a high-intensity, short-duration activity?

    • A) Oxidative phosphorylation
    • B) Glycolysis
    • C) Creatine phosphate
    • D) Citric acid cycle

    Answer: Creatine phosphate

    Explanation: Creatine phosphate: rapid energy source, most tempting wrong is glycolysis which is slower.