Question

Which of the following statements is/are correct/incorrect?
I. A-bands of the muscle is dark and contain myosin.
II. I-bands are the light bands and contain actin.
III. During muscle contraction, the A-band contracts
IV. The part between the two Z-lines is called a sarcomere.
V. The central part of thin filament, not overlapped by thick filament is called H-zone.
Select the correct answer using the codes given below:

• A. I, II and III are correct, While IV and V are incorrect
• B. I, III and V are correct, while II, IV are incorrect
• C. I and II are correct, while III, IV and V are incorrect
• D. I, II, III, and V are correct, while IV is incorrect
• E. I, II, and IV are correct, while III and V are incorrect

Answer 1

The correct option is E I, II, and IV are correct, while III and V are incorrect

I, II and IV statements are correct, while III and V are incorrect. During muscle contraction, the A-band remains unchanged. The central part of thick filament, not overlapped by thin filaments, is called the H-zone.