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Question

Identify the thick myofilament from the given contractile proteins.

A
Troponin
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B
Myosin
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C
Tropomyosin
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D
Actin
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Solution

The correct option is A Myosin
  • Skeletal muscle fiber is made up of two types of filaments. They are thick filament and thin filament.
  • Thick filament is made up of a protein called Myosin. Actin filaments are thinner as compared to the myosin filaments, hence are commonly called thin and thick filaments respectively
  • Each myosin (thick filament) is made up of Many monomeric proteins called Meromyosins.
  • Hence the thick myofilament from the given contractile proteins is myosin.
  • So.the correct answer is 'Myosin'.

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