ReNEET 2026 · Biology · Q100Photosynthesis in Higher PlantsIn our bank: Strong match · 90%
The photorespiration reaction catalysed by RuBisCO is: RuBP + O₂ → 3-Phosphoglycerate + X. Identify X.
- A.Phosphoenolpyruvate
- B.2-Phosphoglycolate✓
- C.Oxaloacetate
- D.Malate
Correct Answer
(B) 2-Phosphoglycolate
Solution & Explanation
In photorespiration RuBisCO acts as an oxygenase: RuBP binds O₂ and, instead of forming two molecules of PGA, forms one molecule of 3-phosphoglycerate (3C) and one molecule of 2-phosphoglycolate (2C). So X = 2-phosphoglycolate.
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