Photorespiration is catalyzed by

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(C) Photorespiration is a process that occurs in $C_3$ plants when the enzyme $RuBisCo$ (Ribulose$-1,5-$bisphosphate carboxylase-oxygenase) acts as an

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RuBisCo

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(C) Photorespiration is a process that occurs in $C_3$ plants when the enzyme $RuBisCo$ (Ribulose$-1,5-$bisphosphate carboxylase-oxygenase) acts as an oxygenase instead of a carboxylase.In the presence of high $O_2$ concentration and low $CO_2$ concentration,$RuBisCo$ binds with $O_2$ to initiate the photorespiratory pathway.Therefore,the enzyme responsible for catalyzing the initial step of photorespiration is $RuBisCo$.

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