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Locomotion And Movement

Question
CBSEENBI11003313
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The thin filaments of a muscle fibre are made up of

  • actin, troponin, tropomyosin

  • actin, troponin

  • myosin, troponin

  • actin, tropomyosin

Solution

A.

actin, troponin, tropomyosin

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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