In photorespiration, which cellular organelles cooperate sequentially in the glycolate pathway to recover phosphoglycolate?
Answer and explanation
Correct answer: D. Chloroplasts, peroxisomes, and mitochondria
- Step 1: When RuBisCO fixes oxygen instead of CO2, 2-phosphoglycolate is formed in the chloroplast. Step 2. The C2 oxidative photosynthetic carbon cycle routes intermediates across chloroplasts, peroxisomes, and mitochondria to reclaim 75% of the carbon as 3-PGA. Answer: Chloroplasts, peroxisomes, and mitochondria. Why not the others: Lysosomes, Golgi, and vacuoles do not participate in photorespiratory glycolate salvaging.
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