Answer :

Final answer:

Myosin is the critical protein responsible for muscle contraction, working in conjunction with actin. Troponin and tropomyosin are also essential for regulating muscle contraction processes.


Explanation:

Myosin is the contractile protein that interacts with actin for muscle contraction. In the process of muscle contraction, myosin moves along actin, generating the force required for muscle movement.

Troponin and tropomyosin are also important proteins involved in muscle contraction. Troponin regulates the binding of calcium ions, which initiates muscle contraction, while tropomyosin blocks the myosin-binding site on actin in relaxed muscles.


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