Q. 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 actin to form a cross-bridge.
II. The -line attached to these actins are also pulled inwards thereby, causing shortening of sarcomere, also called contraction.
III. This pulls the attached actin filaments towards the centre of -band.
The correct option is

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Solution:

Correct answer is (c)