Fill in the blanks with the suitable words
Each actin (thin) filament is made of two 'F' (filamentous) actins (a) wound to each other. Each 'F' actin is a polymer of (b) actins. Two filaments of another protein (c) ____also run close to the 'F' actins throughout its length. A complex protein (d) ____ is distributed at regular intervals on the tropomyosin. in the resting state a submit of troponin masks the active binding sites for (e)____ on the (c)____filaments.

Which of the following statements about the molecular arrangement of actin and mysin In myofibre is/are incorrect ? (i) Each actin (thin filament) is made of 2F (filamentous) actins. (ii) F-actin is the polymer of G (globular) actin. (iii) 2F0actins are twisted into a helix. (iv) Two strands of tropomyosin (protein) lie in the grooves of F-actin. (v) Troponin molecules (complex proteins) are distributed at regular intervals on the tropomyosin. (vi) Troponin forms the head of the myosin molecule. (vii) The myosin is a polymerised protein.

Fill in the blanks with the suitable words____filaments are thinner as compared to the _____ filaments, hence are commonly called ______ and filaments respectively.

The regulatory protein of skeletal muscles whose filaments run close to the F - actin throughout its length is (a) Troponin T (b) Troponin C (c) Troponin I (d) Tropomyosin

In resting stage, binding sites for myosin on actin filaments are masked by

Actin binding sites are located over

Actin is present in thin filament

In a myofibril , the band which contains only actin filament is also known as

Actin is present in thin filaments.

Which area/band in a muscle has oth actin and myosin filaments.

Name the three proteins present on the thin myo-filament