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Q.

Which of the following events occurs during muscle contraction?
A) H zone decreases or disappears
B) A band widens  
C) I band reduces in width  
D) Myosin head hydrolyses ATP
E) Z lines attached to actins are pulled inwards 
Choose the correct answer from the options given below. 

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a

A, B, C and D only

b

A, C, D and E only

c

B, C, D and E only

d

B, C and E only

answer is B.

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Detailed Solution

A band length remains same.

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