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Question

Contractile protein is

A
Actin
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B
Myosin
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C
Troponin
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D
Tropomyosin
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E
All of the above
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Solution

The correct option is E All of the above
Contractile proteins of muscle are actin and myosin, the main components of the thin and thick filaments,respectively.The “regulatory” proteins troponin and tropomyosin are also part of the thin filament. Hence,Contractile consists of all of them.

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