In C_3 plants,photorespiration is initiated b | vedclass

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(D) In $C_3$ plants,the enzyme $RuBisCO$ (Ribulose$-1,5-$bisphosphate carboxylase-oxygenase) can act as both a carboxylase and an oxygenase. When the

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Phosphoglycolate

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(D) In $C_3$ plants,the enzyme $RuBisCO$ (Ribulose$-1,5-$bisphosphate carboxylase-oxygenase) can act as both a carboxylase and an oxygenase. When the concentration of $O_2$ is high and $CO_2$ is low,$RuBisCO$ binds with $O_2$ instead of $CO_2$. This reaction of $RuBP$ (a $5$-carbon compound) with $O_2$ is the first step of photorespiration. This reaction produces one molecule of $3$-phosphoglycerate and one molecule of $2$-phosphoglycolate. Therefore,the process is initiated by the oxygenation of $RuBP$.

In $C_3$ plants,photorespiration is initiated by the reaction of $RuBP$ with:

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