A) It acts as an enzyme
B) It keeps the muscle supple and extensible
C) It is essential for subsequent contraction of rigid muscles by providing energy
D) [b] and [c] both
Correct Answer: D
Solution :
In living muscle fibres ATP performs a dual role. At rest when myosin is not acting as an enzyme ATP keeps the muscles supple and extensible and when stimulated muscles becomes rigid and then ATP provides energy for their contraction.
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