Photorespiration Occurs When Rubisco Reacts RuBP With

Question

Photorespiration occurs when rubisco reacts RuBP with
A) CO₂.
B) O₂.
C) glyceraldehyde 3-phosphate.
D) 3-phosphoglycerate.
E) NADPH.

Accepted Answer

Photorespiration occurs when rubisco reacts with O₂ instead of CO₂. This occurs when the concentration of O₂ increases and the concentration of CO₂ decreases, such as during hot and dry conditions. This leads to the production of toxic byproducts, which the plant must then expend energy to get rid of.