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NEETZoologyLocomotion and Movement

Read the following statements and choose the following option: 1. Actin filament is made up of two F actins 2. Two filaments of tropomyosin runs close to the F filaments. 3.The ‘A’ and ‘I’ bands are arranged alternately throughout the length of the myofibrils. 4. In a resting state, the edges of thin filaments on either side of the thick filaments partially overlap the free ends of the thick filaments. 5. A character

Options

  1. ABoth 2 and 4 are incorrect
  2. BAll are correct
  3. COnly 2 is correct
  4. DOnly 3 is incorrect

Correct answer

B. All are correct

Step-by-step solution

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 close to the ‘F’ actins throughout its length.

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