The contractile protein of skeletal muscle involving ATPase activity is:
Correct answer: C. Myosin
- A. Troponin
- B. Tropomyosin
- C. Myosin
- D. Actinin
Explanation
Myosin is a contractile protein that interacts with actin to bring about contraction of muscle or cell movement. The type of myosin molecule found in muscle fibres consists of a tail, by which it aggregates with other myosin molecules to form so called thick filaments and a globular head, which has sites for the attachment of actin and ATP molecule. Troponin, tropomyosin and actinin are the actin in the thin filament.
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About Support and Movement
Support and movement covers the axial and appendicular skeleton, bone structure, joints and the arrangement of skeletal muscles. Muscle contraction is explained through actin, myosin, sliding filaments, calcium ions and ATP, while arthritis is distinguished as a disorder of joints rather than a normal part of movement.
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