Q. During photorespiration, the oxygen consuming reaction(s) occur in
A) Stroma of chloroplasts and mitochondria
B) Stroma of chloroplasts and peroxisomes
C) Grana of chloroplasts and peroxisomes
D) Stroma of chloroplasts
Explanation
The first reaction of photorespiration occurs in stroma of chloroplast. In this reaction, the RuBP (Ribulose 1, 5-biphophate) consumes one oxygen molecules in presence of enzyme RUBISCO. In peroxisome, the glycolate transferred from chloroplast, takes up oxygen and formed the glyoxylate whereas the $H_{2}O_{2}$ release as byproduct.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.