The addition of oxygen instead of carbon dioxide to RuBP results in
A) cellular respiration.
B) photorespiration.
C) photophosphorylation.
D) aerobic respiration.

Question

Quizplus · Accepted Answer

The addition of oxygen instead of carbon dioxide to RuBP is known as photorespiration. This occurs when there is a shortage of carbon dioxide in the leaf and oxygen becomes the substrate for the enzyme RuBisCO, leading to the formation of a toxic compound that must be detoxified by the plant. Photorespiration is an inefficient process and reduces the efficiency of photosynthesis.

The Addition of Oxygen Instead of Carbon Dioxide to RuBP