AP BIOLOGY

Detailed explanation-1: -Sedoheptulose-1, 7-bisphosphate (SBP) and sedoheptulose-7-phosphate (S7P) are seven-carbon metabolites in the light-independent stage of photosynthesis. SBP is generated from the transfer of DHAP, the three-carbon metabolite, to the four-carbon metabolite, E4P, which is catalyzed by transaldolase.

Detailed explanation-2: -Carbon fixation, the incorporation of carbon dioxide into an organic molecule, is the first step of the light independent process. To form one molecule of glucose, 6 molecules of CO2 bind with Ribulose Bisphosphate (RuBP). This reaction is catalyzed by the enzyme ribulose biosphosphate carboxylase/oxidase (RUBISCO).

Detailed explanation-3: -Ribulose-1, 5-bisphosphate carboxylase/oxygenase (RuBisCO) is the key enzyme involved in photosynthetic carbon fixation, as it catalyzes the conversion of atmospheric CO2 into organic compounds.

Detailed explanation-4: -The ultimate goal of the light-independent reactions (or Calvin cycle) is to assemble a molecule of glucose. This is the part of photosynthesis that requires the CO2 the plant gets from the air. Essentially, the plant needs the carbon from the CO2 to create the building blocks for glucose.