Which molecule has the ATP binding site needed for muscle contraction?
A
Myosin
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B
Actin
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C
Troponin
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D
Tropomyosin
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Solution
The correct option is A Myosin The myosin head contains binding sites ATP binding site and actin binding site. Actin molecule has 2 other proteins tropomyosin and troponin are two other proteins found in small quantities in muscle. They help regulate muscle contraction.