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Assertion: Both hexokinase and glucokina...

Assertion: Both hexokinase and glucokinase require divalent cation `Mg^(++)` or `Mn^(++)`
Reason: The divalent cations act as catalysts.

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The correct Answer is:
C
Both kinases require a divalent cation `(Mg^(2+)"or" Mn^(2+))` which first combines with ATP to form the true substrate, Mg`ATP^(2-)` or `MnATP^(2-)`.
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