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NEETZoologyLocomotion and Movement

Choose the correct statement w.r.t diagram shown.

Options

  1. AMyofibrils have striated appearance due to presence of actin and myosin.
  2. BLight band is called A- band and dark band is called I- band.
  3. CBoth proteins are placed serially w.r.t each other and are parallel to the longitudinal axis of myofibrils.
  4. DActin are thicker as compared to myosin.

Correct answer

A. Myofibrils have striated appearance due to presence of actin and myosin.

Step-by-step solution

A detailed study of the myofibril has established that the striated appearance is due to the distribution pattern of two important proteins – Actin and Myosin. The light bands contain actin and is called I-band or Isotropic band, whereas the dark band called ‘A’ or Anisotropic band contains myosin. Both the proteins are arranged as rod-like structures, parallel to each other and also to the longitudinal axis of the myofibrils. Actin filaments are thinner as compared to the myosin filaments, hence are commonly calle

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