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In photorespiration, the cell organelles involved are
- a)Chloroplast and mitochondrion
- b)Chloroplast, mitochondrion and ribosome
- c)Chloroplast only
- d)Chloroplast, mitochondrion and peroxisome
Correct answer is option 'D'. Can you explain this answer?
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Verified Answer
In photorespiration, the cell organelles involved area)Chloroplast and...
Chloroplast, peroxisome and mitochondria are three cellular organelles involved in photorespiration.
Various steps of photorespiratory pathway:
(a) In presence of high Oz, RuBP carboxylase acts as oxygenase and results in formation of 3PGA (Phosphoglyeric acid) and 2-phosphoglycolate, 2-phosphoglycolate loses PO4 group to make glycolate.
(b) Synthesized glycolate in chloroplast enters into peroxisomes.
Fig: The photorespiratory pathway
(c) The glycolate is oxidised into glyoxylate and H2O2 by oxidase enzyme.
(d) Glyoxylate is changed into glycine (amino acid) by glutamate glyoxylate transaminase (enzyme).
(e) Two molecules of glycine form serine and one mol. of CO2 in mitochondria but no ATP and NADPH are formed.
(f) Finally serine passes into mitochondria and is changed into carbohydrate (3 carbon) and Phosphoglycolate (2 carbon).
(g) Soon glycolate is formed of phosphoglycolate. In peroxisomes, glycolate soon changes into glycine and glycine into serine and CO2, without production of assimilatory powers (ATP and NADPH2).
Most Upvoted Answer
In photorespiration, the cell organelles involved area)Chloroplast and...
This process occurs when the concentration of oxygen increase and carbon dioxide decrease and its substrate is glycolate. RubisCO, catalase (CAT) and GOX, and GDC are the main enzymes in chloroplasts, leaf peroxisomes, and mitochondria from mature leaves, respectively, and support the major role of the photorespiratory C2 cycle in leaf metabolism.
So the correct option is 'Mitochondria, peroxisomes and chloroplasts'.
So the correct option is 'Mitochondria, peroxisomes and chloroplasts'.
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In photorespiration, the cell organelles involved area)Chloroplast and mitochondrionb)Chloroplast, mitochondrion and ribosomec)Chloroplast onlyd)Chloroplast, mitochondrion and peroxisomeCorrect answer is option 'D'. Can you explain this answer?
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