Question:
In photorespiration, glycolate and glyoxylate are produced sequentially in the following organelles:
In photorespiration, glycolate and glyoxylate are produced sequentially in the following organelles:
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Photorespiration can reduce C3 plant photosynthesis efficiency by up to 25% on hot days.
Updated On: Jul 2, 2026
- Chloroplasts and Mitochondria
- Chloroplasts and Peroxisome
- Peroxisome and Mitochondria
- Peroxisome and Chloroplast
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The Correct Option is B
Approach Solution - 1
Photorespiration pathway:
Chloroplast:
RuBisCO oxygenates RuBP → phosphoglycolate
Phosphoglycolate → glycolate
Peroxisome:
Glycolate → glyoxylate
Mitochondria: Glyoxylate → glycine
Chloroplast:
RuBisCO oxygenates RuBP → phosphoglycolate
Phosphoglycolate → glycolate
Peroxisome:
Glycolate → glyoxylate
Mitochondria: Glyoxylate → glycine
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Approach Solution -2
Tracing the C2 (glycolate) cycle shuttle:
Photorespiration is a three-organelle relay. It begins when RuBisCO's oxygenase activity in the chloroplast converts RuBP to phosphoglycolate, which is dephosphorylated to glycolate, this is exported to the peroxisome, where glycolate oxidase converts it to glyoxylate.
Glycine, formed from glyoxylate, only then moves on to the mitochondrion for the next step, so the mitochondrion is not involved in producing glycolate or glyoxylate itself.
Since the question asks specifically where glycolate and glyoxylate are formed in sequence, the answer is Chloroplasts and Peroxisome.
Photorespiration is a three-organelle relay. It begins when RuBisCO's oxygenase activity in the chloroplast converts RuBP to phosphoglycolate, which is dephosphorylated to glycolate, this is exported to the peroxisome, where glycolate oxidase converts it to glyoxylate.
Glycine, formed from glyoxylate, only then moves on to the mitochondrion for the next step, so the mitochondrion is not involved in producing glycolate or glyoxylate itself.
Since the question asks specifically where glycolate and glyoxylate are formed in sequence, the answer is Chloroplasts and Peroxisome.
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