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Mulitple Choice Questions

Which of the following step occurs immediately after binding of Ca2+ with troponin molecule during muscle contraction.

    1. Troponin uncovers the actin binding sites
    2. Binding sites of actin get attached to the myosin head.
    3. Ca2+ goes back inside sarcoplasmic reticulum
    4. Tropomyosin gets removed from the binding sites of actin filaments



Topic-Wise MCQs on Sciences