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Question
Which molecule has the ATP binding site needed for muscle contraction?
Options:
A .  Myosin
B .  Actin
C .  Troponin
D .  Tropomyosin
Answer: Option A
:
A
The myosin head contains binding sitesATP binding site and actin binding site. Actin molecule has 2 other proteins tropomyosinandtroponinare two other proteins found in small quantities in muscle. They help regulate muscle contraction.

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