NEET 2006 Biology question

During photorespiration the oxygen consuming reaction (s) occur in-

(1)Stroma of chloroplasts and mitochondria
(2)Stroma of chloroplasts and peroxisomesCorrect
(3)Grana of chloroplasts and peroxisomes
(4)Stroma of chloroplasts

Answer: (2)

Solution

Photorespiration is the light-dependent uptake of O2 and release of CO2 involving three organelles. In the stroma of the chloroplast RuBisCO acts as an oxygenase, combining RuBP with O2 to form phosphoglycolate and 3-PGA (O2-consuming step 1). In the peroxisome, glycolate is oxidised to glyoxylate by glycolate oxidase

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Question ID VK-089695