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NEET2005ZoologyLocomotion and MovementActual

The thin filaments of a muscle fibre are made up of

Options

  1. Aactin, troponin, tropomyosin
  2. Bactin, troponin
  3. Cmyosin, troponin
  4. Dactin, tropomyosin

Correct answer

A. actin, troponin, tropomyosin

Step-by-step solution

The thin filaments of a muscle fibre are made up of actin, troponin and tropomyosin. One thin filament probably contains 300-400 actin molecules, about 50 tropomyosin and 50 troponin. It is said that tropomyosin plays a vital role in sensitizing the contractile proteins (actin and myosin) to calcium ions.

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