Question

Select the correct option regarding A, B and C.

• A. A-Tropomyosin-runs close to F-actin throughout its length
• B. B-Troponin-complex protein distributed at regular interval of tropomyosin
• C. C-F actin - polymer of monomeric G-actin helically bound to each other
• D. None of these

Answer 1

Answer: (C)

A - Troponin
B - Tropomyosin
C - F-actin
Two filaments of protein tropomyosin run close to F-actins throughout its length. A complex protein troponin is distributed at regular intervals on the tropomyosin. In the resting state, a subunit of troponin masks the active binding sites for myosin on the actin filaments.