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STD 11 - 17. Locomotion and movement — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYSTD 11 - 17. Locomotion and movement1 Mark
MCQ
The given figure represents the cross bridge cycle in skeletal muscle. What does the step $B$ in the figure represents ?
  • A
    Attachment of myosin head to actin forming cross bridge.
  • ✓
    Release of phosphate. Myosin changes shape to pull actin
  • C
    Attachment of new $ATP$ to myosin head. The cross bridge detaches
  • D
    Splitting of $ATP$ into $ADP$ and $Pi$. Myosin cocks into its high energy conformation.
✓

Answer

Correct option: B.
Release of phosphate. Myosin changes shape to pull actin
b
Step $A$: Attachment of myosin head to actin forming cross bridge.
Step $B$: Release of phosphate. Myosin changes shape to pull actin.
Step $C$: Attachment of new $ATP$ to myosin head. The cross bridge detaches.
Step $D$: Splitting of $ATP$ into $ADP$ and $Pi$. Myosin cocks into its high energy conformation

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