What is the role of troponin in the resting state actin filament?

What is the role of troponin in the resting state 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 separate the "F" actins
  4. To regulate the interaction between "F" actins and tropomyosin

Solution

In the resting state a subunit of troponin masks the active binding sites for myosin on the actin filaments.

Asked in: NCERT

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