Q. In $C_{3}$ plant, when $O_{2}$ concentration is more, the $O_{2}$ binds to Rubisco and RuBP gets changed to
A) 2 molecules of PGA
B) 2 molecules of phosphoglycerate
C) 2 molecules of phosphoglycolate
D) One molecule each of phosphoglycerate and phosphoglycolate
Explanation
The site for photorespiration is chloroplast. RuBP carboxylase function as oxygenase and instead of fixing carbon dioxide, it convert oxidase ribulose 1-5 biphosphate (RuBP) to produce phosphoglycerate and phosphoglycolate $RuBP + O_{2}\underset{Oxygenase}{\overset{\ \ \ \ \ \ \ RuBP\ \ \ \ \ \ \ }{\rightarrow}}PGA +$ Phosphoglycolate
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.