Which of the following is the contractile protein of a muscle?
Tubulin
Myosin
Collagen
All of the above
A
Tubulin
B
Myosin
C
All of the above
D
Collagen
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Solution
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Myosin is formed of the myofibril, which is a very fine contractile fibre. Myofibril is a groups of fibres, which extend as parallel columns along the length of striated muscle fibres. These binds to the actin and leads to shortening of sarcomeres. It hydrolyzes the ATP to form ADP, which is used for muscle contraction.
So, the correct answer is option B.
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