Question

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.

Answer 1

Answer:

(1)True.

(2)True.

(3)True.

(4)True.

(5)True.

(6)False.

(7)True.

Answer 2

Explanation:

1. True
2. True
3. True
4. True
5. True
6. False
7. True