Talk about light independent photosynthetic reactios.

ATP and NADPH are used to reduce CO2 into glucose through Calvin cycle in stroma, which occurs within the chloroplast while other compartments get their ATP from mitochodria cell respiration. Includes Rubisco that fixes atmospheric CO2 on a substrate which is ribulose biphosphate. Glucose is finally polymerized and converted into fructose and sucrose for distribution to all cells of the plant.