Structure of Contractile Proteins (Actin) : Each actin filament is made of two ________ (C) helically wound to each other. Each ________ (C) is a polymer of monomeric ____________. Two filaments of another protein, ___________ (B) also run close to the ____________ (C) throughout its length. In the resting state a subunit of ___________ (A) masks the active binding sites for myosin on the actin filaments

Question

( a ) ‘F’actins ; ‘F’ actin, ‘G’actins; tropomyosin, ‘F’ actins; troponin
( b ) ‘F’actins ; ‘F’ actin, ‘G’actins; troponin, ‘F’ actins; tropomyosin
( c ) ‘G’actins ; ‘G’ actin, ‘F’actins; tropomyosin, ‘G’ actins; troponin
( d ) ‘G’actins ; ‘G’ actin, ‘F’actins; troponin, ‘G’ actins; tropomyosin