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Biology · PYQ NEET UG 2021

हिन्दी

During muscular contraction which of the following events occur? (a) 'H' zone disappears (b) 'A' band widens (c) 'I' band reduces in width (d) Myosin 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.

  1. (b), (d), (e), (a) only
  2. (a), (c), (d), (e) only
  3. (a), (b), (c), (d) only
  4. (b), (c), (d), (e) only

Correct answer · Option 2

(a), (c), (d), (e) only

Explanation

During contraction, 'H' zone disappears (a), 'I' band shortens (c), myosin hydrolyzes ATP (d), and Z-lines are pulled inwards (e). 'A' band length remains constant.
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