In plants,glycolate metabolism takes place in

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(D) In plants,glycolate metabolism,also known as photorespiration or the $C_{2}$ cycle,occurs when the enzyme $RuBisCO$ acts as an oxygenase rather th

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Both $(a)$ and $(b)$

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(D) In plants,glycolate metabolism,also known as photorespiration or the $C_{2}$ cycle,occurs when the enzyme $RuBisCO$ acts as an oxygenase rather than a carboxylase.This happens under conditions of low $CO_{2}$ concentration and high $O_{2}$ concentration.Under these conditions,$RuBisCO$ binds with $O_{2}$ instead of $CO_{2}$,leading to the formation of phosphoglycolate,which is subsequently converted into glycolate.Therefore,both low $CO_{2}$ and high $O_{2}$ concentrations promote glycolate metabolism.

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