WB JEE Medical WB JEE Medical Solved Paper-2014

  • question_answer
    The correct sequence of organelles in which glycolate and glyoxylate  are produced sequentially in photorespiration, is

    A)  chloroplast and mitochondria

    B)  chloroplast and peroxisome

    C)  peroxisome and mitochondria

    D)  peroxisome and chioroplast

    Correct Answer: B

    Solution :

     Photorespiration   is   a   light   dependent phenomenon of oxygenation of RuBP and  release of \[\text{C}{{\text{O}}_{\text{2}}}\]by the photosynthetic organs of a plant. The site of photorespiration is chloroplast. Phosphoglycolate produced by RuBP oxygenase activity   is   converted   to   glycolate   by phosphoglycolate    phosphatase    in    the chloroplast.   Glycolate   then   enters   the peroxisomes and is converted to glyoxylate by glycolate oxidase. Apart from chloroplast and peroxisomes, mitochondria   is   also   involved   in   the photorespiratory process.


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