- A Actin
- B Troponin
- C Tropomyosin
- D Myosin
Correct answer: D. Myosin
Explanation: Myosin forms the thick filaments of the sarcomere. Myosin heads (cross-bridges) bind to actin and pull the thin filaments inward during contraction, shortening the sarcomere.
Concept context
Types of movement, muscle contraction, skeletal system, joints, and disorders. Important for Class 11 and NEET.