Question

Which of the following is the regulatory protein of a muscle?

• A. Tubulin
• B. Myosin
• C. Tropomyosin
• D. All of the above

Answer 1

The correct option is C Tropomyosin

Tropomyosin is the protein which is present in the grooves of the actin filament. This protein is known as the regulatory protein. The protein in the relaxed state prevents the contraction of the muscle by myosin. The protein hides the active site of the myosin and prevents the process of contraction. The protein is responsible for the regulation of contraction and relaxation of the muscle.

Thus, the correct answer is option C.