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NEETZoologyLocomotion and Movement

What is the main component of an actin (thin) filament?

Options

  1. ATroponin
  2. BTropomyosin
  3. CF (Filamentous) actin
  4. DG (Globular) actin

Correct answer

C. F (Filamentous) actin

Step-by-step solution

The portion of the myofibril between two successive "Z" lines is considered as the functional unit of contraction and is called a sarcomere. The striated appearance of myofibrils is due to the distribution pattern of two important proteins - Actin and Myosin. The light bands contain actin and the dark bands contain myosin.The light bands in a myofibril contain actin and is called I-band or Isotropic bandThe actin filaments are thinner as compared to the myosin filaments Each actin (thin) filament is made of two "F"

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