1. Tardigrade
  2. Question
  3. Biology
  4. Read the given statements and select the correct option. Statement 1: A primary myofilament is composed of a bundle of rod-like molecules of a protein myosin. Statement 2: Myosin and actin together form a contractile apparatus.

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Q. Read the given statements and select the correct option.
Statement 1 : A primary myofilament is composed of a bundle of rod-like molecules of a protein myosin.
Statement 2 : Myosin and actin together form a contractile apparatus.

Locomotion and Movement

Solution:

The primary myofilaments consist mainly of myosin protein. In the presence of $Ca^{2+}$ and energy from $ATP$, actin and myosin interact forming actomyosin which causes contraction of muscles.