On a hot day, a plant closes its stomata, causing internal CO2 levels to drop. Which enzymatic activity of Rubisco then becomes dominant?
Q1. On a hot day, a plant closes its stomata, causing internal CO2 levels to drop. Which enzymatic activity of Rubisco then becomes dominant?
Answer: Oxygenase
Explanation: Rubisco binds oxygen when CO2 levels are low, leading to photorespiration. It acts as a carboxylase under normal high CO2 conditions.