In a skeletal muscle cell, which of the following is the basic unit of contraction?

Myofibril

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Muscle fibre

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Sarcomere

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Myosin filament

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Solution

The correct option is B Sarcomere
A sarcomere is the basic unit of muscle tissue in both cardiac and skeletal muscle. Myofibril activity is required for muscle contraction on the molecular level. When ATP binds to myosin, it separates from the actin of the myofibril, which causes a contraction.
So, the correct option is 'Sarcomere'.

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