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Multiple Choice
Which protein interacts with actin to produce movement in muscle contraction?
A
Tropomyosin
B
Collagen
C
Myosin
D
Troponin
Verified step by step guidance
1
Understand the role of actin in muscle contraction: Actin is a protein that forms thin filaments and is crucial for muscle contraction.
Identify the proteins involved in muscle contraction: The main proteins are actin, myosin, tropomyosin, and troponin.
Recognize the function of myosin: Myosin is a motor protein that interacts with actin filaments to produce movement by forming cross-bridges and pulling the actin filaments.
Differentiate the roles of tropomyosin and troponin: Tropomyosin blocks the binding sites on actin, while troponin regulates the position of tropomyosin in response to calcium ions.
Conclude that myosin is the protein that directly interacts with actin to produce movement during muscle contraction.