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A sequence to better understand the detailed mechanisms of photosynthesis. The aerial parts of the plant are the places where organic matter is produced by photosynthesis. Captured by the chlorophyll pigments at the chloroplast level, light energy is converted into chemical energy by the photolysis of water, with the release of O2 and the reduction of CO2 leading to the production of glucose and other soluble sugars. Concepts covered: historical experiments, CO2, carbon dioxide, chlorophyll cell, chloroplast, stroma, thylakoid, chlorophyll, chlorophyll a, chlorophyll b, xanthophylls, carotene, starch, organic molecule, autotrophic metabolism, light energy conversion, action spectrum, absorption spectrum, 440nm, 680nm, chlorophyll pigments, leaf pigment chromatography, Ruben and Kamen experiment, isotopic labeling, photolysis of water, photo-oxidation of water, Arnon experiment, autoradiography, Calvin cycle, light phase, dark phase, photochemical phase, non-photochemical phase, APG, phosphoglyceric acid, RudiP, ribulose diphosphate, ribulose biphosphate, ATP, proton gradient, CO2 reduction