Photorespiration in C3 plants starts from
(a) phosphoglycerate (b) glycerate
(c) glycine (d) phosphoglycolate
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d) phosphoglycolate
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Photorespiration in C3 plants starts from phosphoglycolate.
* Photorespiration takes place when the enzyme for carbon fixation, RuBisCO reacts with oxygen instead of carbon dioxide to produce 3-phosphoglycerate and 2-phosphoglycolate.
* The phosphoglycerate is the usual product and enters the dark cycle of photosynthesis.
* Phosphoglycolate inhibits photosynthetic enzymes, which again is converted back to phosphoglycerate at the cost of an ATP molecule.
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