MDCAT Biology MCQ #5620

During muscle contraction, what is the role of troponin?

MDCAT Biology MCQ #5620

  1. Question 1

    Q1. During muscle contraction, what is the role of troponin?

    • A) Blocks actin-myosin binding site
    • B) Binds to calcium ions
    • C) Provides ATP for contraction
    • D) Forms cross-bridges with actin

    Answer: Blocks actin-myosin binding site

    Explanation: Troponin blocks actin-myosin binding site in relaxed muscle; option B is related but incorrect as it's tropomyosin that moves.