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The substrate for photorespiration is

1. Phosphoglyceric acid
2. Glycolate
3. Serine
4. Glycine

Correct answer: Glycolate

Solution

Glycolate is the key substrate that enters the photorespiratory pathway after RuBisCO’s oxygenase reaction. It is converted and transported through chloroplasts, peroxisomes, and mitochondria during photorespiration.

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