1. put the steps in the process of photosynthesis in order. A. reactants collect in chloroplasts. B. products result as food and oxygen. C. a chemical reaction occurs.
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Answer:
In plants, photosynthesis occurs in chloroplasts, large organelles found mainly in leaf cells.
The principal end products are two carbohydrates that are polymers of hexose (six-carbon) sugars: the disaccharide sucrose and leaf starch, a large, insoluble glucose polymer. Leaf starch is synthesized and stored in the chloroplast. Sucrose is synthesized in the cytosol from three-carbon precursors generated in the chloroplast and is transported from the leaf to other parts of the plant. Nonphotosynthetic (nongreen) plant tissues like roots and seeds metabolize sucrose for energy by the pathways described in the previous sections. Photosynthesis in plants, as well as in eukaryotic single-celled algae and in several photosynthetic prokaryotes (the cyanobacteria and prochlorophytes), also generates oxygen. The overall reaction of oxygen-generating photosynthesis,
6CO2 + 6H2O ---> 6O2 + C6H12O6
is the reverse of the overall reaction by which carbohydrates are oxidized to CO2 and H2O.