Q. During muscular contraction which of the following events occur? A. 'H' zone disappears B. 'A' band widens C. 'I' band reduces in width D. Myosine hydrolyzes ATP, releasing the ADP and Pi E. Z-lines attached to actins are pulled inwards Choose the correct answer from the options given below.
A) A, B, C, D only
B) B, C, D, E only
C) B, D, E, A only
D) A, C, D, E only
Explanation
[Solution] During contraction the A band keeps its length; the H zone disappears, the I band shortens, myosin hydrolyses ATP and the Z lines are pulled inwards. Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.