Statement I: Carboxylation is the most crucial step of Calvin cycle where $\mathrm{CO}_{2}$ is utili

Question

Statement I: Carboxylation is the most crucial step of Calvin cycle where $\mathrm{CO}_{2}$ is utilised for the carboxylation of RuBP.\ Statement II: Carboxylation is catalysed by the enzyme RuBisCO which results in the formation of two molecules of 3PGA.\

Professor PC Thomas Classes · Answer

(a) : Carboxylation is the fixation of $\mathrm{CO}_{2}$ into a stable organic intermediate. It is the most crucial step of Calvin cycle where $\mathrm{CO}_{2}$ is utilised for the carboxylation of RuBP through the use of ATP and NADPH generated by the light reactions. This reaction is catalysed by enzyme RuBisCO which results in the formation of two molecules of 3-phosphoglyceric acid or PGA, which is the first stable product of photosynthesis.