ANATOMY

Detailed explanation-1: -Sarcomeres consist of highly ordered arrays of thick myosin and thin actin filaments along with accessory proteins.

Detailed explanation-2: -Thick myofilaments are comprised of around 300 spirally arranged protein molecules called myosin. Each myosin molecule is composed of two heavy chains and four light chains.

Detailed explanation-3: -The thick filament, myosin, has a double-headed structure, with the heads positioned at opposite ends of the molecule. During muscle contraction, the heads of the myosin filaments attach to oppositely oriented thin filaments, actin, and pull them past one another.

Detailed explanation-4: -The thick filaments are composed of myosin, and the thin filaments are predominantly actin, along with two other muscle proteins, tropomyosin and troponin. Muscular contraction is caused by the interaction between actin and myosin as they temporarily bind to each other and are released.

Detailed explanation-5: -The thick filaments are made up of myosin while the thin filament is made up of three proteins actin, troponin, and tropomyosin. So, the correct answer is ‘Myosin’.