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