AP BIOLOGY

Detailed explanation-1: -This reaction is catalyzed by the enzyme RuBP carboxylase/oxygenase, or rubisco. Reduction. In the second stage, ATP and NADPH are used to convert the 3-PGA molecules into molecules of a three-carbon sugar, glyceraldehyde-3-phosphate (G3P).

Detailed explanation-2: -The main function of RuBisCO is in photosynthesis and photorespiration. It catalyses the first step of carbon fixation in the C3 pathway or Calvin cycle, i.e. carboxylation of RuBP. It results in the formation of 2 molecules of 3-PGA.

Detailed explanation-3: -Rubisco takes carbon dioxide and attaches it to ribulose bisphosphate, a short sugar chain with five carbon atoms. Rubisco then clips the lengthened chain into two identical phosphoglycerate pieces, each with three carbon atoms.

Detailed explanation-4: -RuBisCO is the main photosynthetic enzyme for carbon fixation in the Calvin cycle. It catalyzes the carboxylation of RuBP to produce two molecules of 3-PGA. The Calvin cycle occurs in both C3 and C4 plants. The location of RuBisCO differs in both types of plants.

Detailed explanation-5: -Rubisco catalyses the primary photosynthetic CO2 reduction reaction, the fixation of atmospheric CO2 to ribulose-1, 5-bisphosphate (RuBP) to form two molecules of 3-phosphoglycerate (3PGA), which is subsequently used to build the organic molecules of life.