Class 11 NEET Biology Photosynthesis in Higher Plants

(b) Light dependent uptake of O2 and release of CO2 in C3 photosynthetic cell is called photorespiration. Glycolate (glycolic acid) is the chief metabolite of photorespiration and also its substrate. Other important metabolities are the amino acids glycine and serine. But phosphoglyceric acid (PGA) is a lipid and is not substrate of photorespiration.