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NEETZoologyLocomotion and Movement

Choose the incorrect statement based on the diagram shown:

Options

  1. AThis structure is made up of lipids and fats.
  2. BThere are two F-actins helically wound to each other.
  3. CTroponin masks the active binding site for myosin on actin filament.
  4. DTropomyosin runs close to the F-actin.

Correct answer

A. This structure is made up of lipids and fats.

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. Each actin (thin) filament is made of two ‘F’ (filamentous) actins helically wound to each other. Each ‘F’ actin is a polymer of monomeric ‘G’ (Globular) actins. Two filaments of another protein, tropomyosin also run clo

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