Question

In photorespiration, RuBP carboxylase-oxygenase combines with oxygen to yield ___________________.

• A. Two molecules of phosphoglycerate
• B. Two molecules of phosphoglycolate
• C. One molecules of phosphoglycerate and one molecules of phosphoglycolate
• D. Two molecules of glucose

Answer 1

Answer: (C)

One molecules of phosphoglycerate and one molecules of phosphoglycolate

In photorespiration, oxygen gas combines with RuBP to form one molecule of phosphoglycerate (3C compound) and phosphoglycolate (2C compound ) that breaks down into glyceraldehyde phosphate and glycolic acid, a two-carbon molecule that is further catabolized into carbon dioxide.

So the correct answer is option C.