A) phosphorylation
B) decarboxylation
C) oxygenation
D) carboxylation
Correct Answer: C
Solution :
The first reaction in photorespiration is oxygenation. At high temperature RuBP-carboxylase functions as oxygenase and instead of fixing \[C{{O}_{2}}\], oxidizes ribulose 1, 5-biphosphate to produce phosphoglyceric acid and phospho-glycolate. \[\begin{align} & RuBP+C{{O}_{2}}\xrightarrow{Oxygenation}PGA \\ & +Phosphoglycolate \\ \end{align}\]
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