The following events occurring during the cycle of contraction in a skeletal muscle fibre.
1) A molecule of ATP binds to a myosin head.
2) A molecule of ATP is hydrolysed to form ADP and Pi.
3 ) An actin filament is pulled towards the centre of the sarcomere.
4 ) A myosin head rotates into its high energy conformation.
5 ) A cross-bridge forms.
Which of the following is the correct sequence for these events?
A) 1, 4, 5, 2, 3.
B) 1, 4, 2, 5, 3.
C) 5, 3, 1, 2, 4.
D) 5, 1, 2, 4, 3.
E) 5, 4, 1, 3, 2.
Correct Answer:
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