Question

Which of the following is the main production the photorespiration of ${{C}_{3}}$ plants?

• A. Glycolate
• B. Glycerate
• C. Phosphoglycolate
• D. Phosphoglycerate

Answer 1

Answer: (C)

Phosphoglycolate

Answer 2

Phosphoglycolate is the substrate for enzyme oxygenase. It is converted into glycolate which moves to adjacent peroxisome and converted into glyoxylate and further glycine. Glycinemoves to mitochondria in which by releasing $C{{O}_{2}}$ it converts into 3-PGA which forms carbohydrate. Therefore, substrate phosphoglycolate is the main product in photorespiration.