The substrate for photorespiration is ....... | vedclass

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(B) Photorespiration,also known as the $C_2$ cycle,occurs when the enzyme $RuBisCO$ acts as an oxygenase instead of a carboxylase. This process begins

Vedclass · Accepted Answer

Glycolate

Vedclass · Answer

(B) Photorespiration,also known as the $C_2$ cycle,occurs when the enzyme $RuBisCO$ acts as an oxygenase instead of a carboxylase. This process begins with the oxygenation of $RuBP$ (Ribulose$-1,5-$bisphosphate) to form one molecule of $3$-phosphoglycerate and one molecule of $2$-phosphoglycolate. The $2$-phosphoglycolate is then dephosphorylated to form glycolate. Therefore,glycolate acts as the primary substrate that enters the photorespiratory pathway in the peroxisomes.

Column-$I$	Column-$II$
$(1)$ Molecule transport from chloroplast to peroxisome	$(p)$ Glycine
$(2)$ Molecule transport from peroxisome to mitochondria	$(q)$ Serine
$(3)$ Molecule transport from mitochondria to peroxisome	$(r)$ Glycerate
$(4)$ Molecule transport from peroxisome to chloroplast	$(s)$ Glycolate

The substrate for photorespiration is ......... .

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