Contractile protein of skeletal muscle cells involving ATPase activity is:
Correct answer: B. Myosin
- A. Actin
- B. Myosin
- C. Troponin
- D. Tropomyosin
Explanation
Myosin is a contractile protein found in muscle cells, and it contains ATPase activity. The myosin molecule has a globular head region with ATPase activity, which plays a critical role in the energy-dependent cycle of muscle contraction. Myosin ATPase hydrolyzes ATP to provide the energy required for the myosin heads to attach to actin, generate force, and initiate muscle contraction.
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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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