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Digestion of Nutrients

The enzymes r...

Question

The enzymes ribulose biphosphate carboxylase-oxygenase and phosphenol pyruvate carboxylase are activated by

A

Mg

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B

Zn

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C

Mo

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D

Mn

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Solution

The correct option is A Mg
The Mg ion influx into chloroplast stroma is caused by light. These ions serve to brings together the reactants at the active site as well as polarizes the $C O_{2}$ to facilitate the nucleophilic attack by PEP or RuBP present on the active site of ribulose biphosphate carboxylase-oxygenase and phosphoenol pyruvate carboxylase respectively.
So, the correct answer is option A.

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