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Arrange the given steps of muscle contraction in the series of events from first to last

I. Myosin head binds to the exposed active site on action to form a cross bridge

II. The Z-line attached to these actin are also pulled in wards there by causing shortening of sarcomere also called contraction

III. This pulls the attached actin filaments towards the centre of A -band

The correct option is

a)

I  II  III

b)

III  II  I

c)

I  III  II

d)

III  I  II



Question ID - 4656 | SaraNextGen Top Answer

Arrange the given steps of muscle contraction in the series of events from first to last

I. Myosin head binds to the exposed active site on action to form a cross bridge

II. The Z-line attached to these actin are also pulled in wards there by causing shortening of sarcomere also called contraction

III. This pulls the attached actin filaments towards the centre of A -band

The correct option is

a)

I  II  III

b)

III  II  I

c)

I  III  II

d)

III  I  II

1 Answer
127 votes
Answer Key / Explanation : (c) -

(c)

By utilizing the energy from ATP hydrolysis, the myosin head binds to the exposed active sites on actin to form a cross bridge. This pulls the attached actin filaments towards the centre of A-band. The Z-line attached to these actin are also pulled inwards thereby causing the shortening of sarcomere, i.e., contraction

127 votes


127