Biology · Bioenergetics

When RuBP reacts with oxygen instead of CO₂ in a process called photorespiration, RuBisCO catalyzes the formation of one molecule of 3-phosphoglycerate (PGA) and one molecule of 2-phosphoglycolate (Phosphoglycolate). This process occurs when plants have less CO₂ but high O₂.

This is partially correct because one of the products of the reaction is 3-phosphoglycerate (PGA). However, the missing product in the given reaction is not phosphoglycerate alone but another compound formed due to oxygenation.

This is the correct answer. When RuBP reacts with oxygen instead of CO₂ in a process called photorespiration, RuBisCO catalyzes the formation of one molecule of 3-phosphoglycerate (PGA) and one molecule of 2-phosphoglycolate (Phosphoglycolate).

This is incorrect because glycerate is not a direct product of RuBP oxygenation. It is an intermediate in other metabolic pathways, such as glycolysis and the salvage pathway of photorespiration.

This is incorrect because glycolate is formed later in the photorespiratory cycle, but it is not the immediate product of RuBP oxygenation. The immediate product in the reaction catalyzed by RuBisCO is phosphoglycolate, which is later converted into glycolate.