Presence of oxygen can poison the reaction of Rubisco, due to an alternate reaction in which the ribulose 1,5 bis phosphate is oxidized, rather than reacting with CO₂

Question

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Rubisco can catalyze a reaction with oxygen instead of carbon dioxide, leading to a process called photorespiration, where ribulose 1,5-bisphosphate is oxidized, reducing the efficiency of photosynthesis.

Presence of Oxygen Can Poison the Reaction of Rubisco, Due