Question

Which of the.following statements are correct regarding muscle proteins ?
(i) Actin is a thin filament and is Frock up of two F-actirs.
(ii) The complex protein, tropomyosin is distributed at regular intervals on the troponin.
(iii) Myosin is a thick flament which is also a polymerised protein.
(iv) The globular head of meromyosin consists of light merornyosin (LMM).

• A. (i), (ii) and (iii)
• B. (i), (ii) and (iv)
• C. (i) and (iii)
• D. (ii) and (iv)

Answer 1

The correct option is A (i), (ii) and (iii)

Actin is the thin filament in the sarcomere, comprising F-actin, tropomyosin and troponin protein, troponin is attached to tropomyosin, while myosin is a thick filament.

So, the correct option is '(i), (ii) and (iii)'.