NEET BIOLOGY

Detailed explanation-1: -The muscle proteins can be divided in to contratile, regulatory, sarcoplasmic and extracellular forms. The most important are the contractile proteins actin and myosin. Among the regulatory proteins, troponin, tropomyosin, M-protein, beta-actin, gamma-actin and C-protein are great importance.

Detailed explanation-2: -Myofibrillar Proteins: Muscle fibers are composed of myofibrils. The proteins that comprise the myofibril, including actin and myosin and several more. The myofibrillar protein components most important for muscle fiber structure are actin and myosin.

Detailed explanation-3: -What are the Muscle Proteins Types Found in Muscles? Based on their solubility at different salt concentrations, skeletal muscle proteins can be divided into three categories: myofibrillar (50–60%), sarcoplasmic (30%), and stromal (10–20%) proteins.

Detailed explanation-4: -Muscle fibers are composed of myofibrils which are composed of sarcomeres linked in series. The striations of skeletal muscle are created by the organization of actin and myosin filaments resulting in the banding pattern of myofibrils.

Detailed explanation-5: -Muscle cells are long, thin tubes divided into segments, each containing filamentary molecules called actin and myosin. The two molecules interpenetrate each other like two toothbrush heads pushed together bristle to bristle.