Question

in one to three sentences, describe what happens during the carbon fixation stage of the calvin cycle.

Explanation:

During the carbon fixation stage of the Calvin cycle, an enzyme (RuBisCO) catalyzes the reaction between carbon dioxide ($\ce{CO_2}$) and a five - carbon molecule called ribulose - 1,5 - bisphosphate (RuBP). This reaction forms an unstable six - carbon compound, which immediately splits into two three - carbon molecules of 3 - phosphoglycerate (3 - PGA).

Answer:

During carbon fixation in the Calvin cycle, RuBisCO combines $\ce{CO_2}$ with RuBP to form an unstable six - carbon compound that splits into two 3 - PGA molecules.