Question:medium

The muscle contraction cycle consist of the following steps. Select the correct sequence.
A. ATP hydrolysis
B. Detachment of myosin from actin
C. Power stroke
D. Attachment of myosin to actin to form cross-bridge

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Cross-bridge Cycle Order:
1. ATP Hydrolysis (cocks head) [A] $\to$ 2. Cross-bridge Attachment [D] $\to$ 3. Power Stroke (pulls actin) [C] $\to$ 4. ATP Binds & Detaches [B].
Rigor mortis occurs when ATP is absent, preventing detachment (step B).
Updated On: Jul 28, 2026
  • A, D, C, B
  • D, A, C, B
  • A, D, B, C
  • D, C, A, B
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The Correct Option is A

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