What is the function of tropomyosin in the actin filament?

What is the function of tropomyosin in the actin filament?
  1. To activate the binding sites for myosin on actin filaments
  2. To mask the active binding sites for myosin on actin filaments
  3. To run close to the "F" actins throughout its length
  4. To regulate the interaction between "F" actins and troponin

Solution

Two filaments of tropomyosin run close to the "F" actins throughout its length.

Asked in: NCERT

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