_ is formed by two pairs of light chains, and one pair of heavy chains.
Correct answer: B. Myosin
- A. Actin
- B. Myosin
- C. Myofibril
- D. Fibroin
Explanation
The answer is Myosin. Myosin is a protein that is essential for muscle contraction. It is composed of two pairs of light chains and one pair of heavy chains. The heavy chains form the core of the myosin molecule, and the light chains are involved in binding to actin and other proteins. The combination of light chains and heavy chains forms the structure of myosin, which is responsible for the interaction between myosin and actin during 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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