Question

Which of the following is a correct sequence of cell organelles during photorespiration?

• A. Chloroplast, peroxisome, mitochondrion
• B. Chloroplast, mitochondrion, vacuole
• C. Chloroplast, vacuole, peroxisome
• D. Chloroplast, peroxisome, golgi bodies

Answer 1

The correct option is A Chloroplast, peroxisome, mitochondrion

In photorespiration, RuBP undergoes oxygenation to form phosphoglycerate (PGA) and phosphoglycolate in the chloroplast. The phosphoglycolate is converted to glycolate. The glycolate then goes into the peroxisome where it is converted to glycine. Glycine then moves into mitochondria where it is converted to serine. Serine goes back into the peroxisome where it forms glycerate. Glycerate returns to the chloroplast where it is converted to PGA. This PGA is utilized in the Calvin cycle.