... for all green parts of plants. 2. Other structures in leaves provide entries and exits for the reactants and products of the process: C02 in and 02 out through stomates; H20 in through veins from the roots. 3. The green pigment that absorbs light energy is chlorophyll, located in the membranes (thylakoids in stacks, grana) within the chloroplasts. II. General underlying processes. A. Plants produce 02 gas by splitting water B. Photosynthesis uses redox, as does cellular respiration 1. When H20 molecules are split, yielding 02, the waters are oxidized, giving up their electrons (and H+ ions). 2. At the same time, C02 molecules are reduced to glucose as electrons and H+ ions are added to them. 3. Compare this to the reverse overall reaction in cellular respiration, where glucose is oxidized and oxygen is reduced. 4. In photosynthesis, the electrons travel "uphill" from the water to the glucose, adding the light energy captured by chlorophyll. 5. In cellular respiration, the electrons travel "downhill" from the glucose to ...

See this essay or coursework document in full right now