A) ATP breaks
B) ATP is formed
C) GTP breaks
D) None of these
Correct Answer: A
Solution :
Muscular contraction is controlled by a process that depends on the molecular structure of the thin filament. When a muscle contracts, the accessory proteins of the thin filament are moved aside, exposing the binding sites on the actin. Using energy from the splitting of adenosine triphosphate (ATP), the cross-bridges repeatedly bend, release and reattach further long.
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