Question

The organelles which take part in photo-respiration are

• A. chloroplast, mitochondria, nucleus
• B. chloroplast, mitochondria, lysosome
• C. mitochondria, chloroplast, peroxisome
• D. mitochondria, lysosomes, peroxisome

Answer 1

Answer: (C)

mitochondria, chloroplast, peroxisome

Answer 2

The process of photorespiration requires 3 cell organellesmitochondria, chloroplasts and peroxisomes. In chloroplasts glycolate is formed from ribulose biphosphate which passes into peroxisomes to be changed into glyoxylate. In this reaction $H_2O_2$ is evolved. Glyoxylate is changed to glycine which now enters mitochondria. Two molecules of glycine combine to form one molecule of serine with the evolution of $CO_2$.