AP BIOLOGY

Detailed explanation-1: -This process is called carbon fixation, because CO2 is “fixed” from its inorganic form into organic molecules. ATP and NADPH use their stored energy to convert the three-carbon compound, 3-PGA, into another three-carbon compound called G3P.

Detailed explanation-2: -Photosynthesis by land plants, bacteria, and algae converts carbon dioxide or bicarbonate into organic molecules.

Detailed explanation-3: -Carbon Fixation Definition. “Carbon fixation is the process by which plants fix atmospheric carbon to form organic compounds.” All the autotrophs, bacteria, algae and plants fix atmospheric carbon dioxide by the process of photosynthesis or chemosynthesis.

Detailed explanation-4: -During the first phase of the Calvin cycle, carbon fixation occurs. The carbon dioxide is combined with ribulose 1, 5-bisphosphate to form two 3-phosphoglycerate molecules (3-PG). The enzyme that catalyzes this specific reaction is ribulose bisphosphate carboxylase (RuBisCO).

Detailed explanation-5: -Autotrophic nutrition is a process in which the organism produces its food from simple inorganic materials such as water, carbon dioxide and mineral salts in the presence of sunlight.