Comparing Photosynthesis and Cellular Respiration
by: Kyle Burford

The reactants for photosynthesis are Carbon Dioxide (6CO2) plus Water (6H2O). The yield for photosynthesis is sunlight which ends up making the products Glucose (C6H12O6) plus Oxygen (6O2). The reactants for Cell Respiration are glucose (C6H12O6) plus Oxygen (6O2) and together they make the products Carbon Dioxide (6CO2) plus Water (6H2O) plus ATP. The purpose of Cellular Respiration is to create Energy through ATP. The purpose of photosynthesis is to create sugars (glucose). Cellular Respiration takes place in the Mitochondria of an organism while Photosynthesis takes place in the chloroplast of an organism. There are three basic steps to Cellular Respiration. First it's Glycolysis, when one molecule of glucose is broken in half, making two pyruvic acid molecules. Next it is the Kreb's Cycle, pyruvic acid is broken down into Carbon Dioxide. Finally, it's the Electron Transport Chain. In this final step, ADP is converted to ATP. 32 ATP's are made in this final step. There are two steps in Photosynthesis, The Light Reaction and The Dark Reaction. In the Light Reaction, ATP and NADPH are formed. Oxygen gas is also made as a waste product. Light and Water are the two things required for The Light Reaction. During the Dark Reaction, carbon dioxide is turned into sugar glucose. The role of ATP in Cellular Respiration is that ATP is being the final thing produced at the end of the cycle. 36-38 ATP's are produced by the end of the cycle. The role of ATP in Photosynthesis is that it is a reactant for the Dark Reaction and it is a product of the Light Reaction. Photosynthesis has anabolic type of reaction and Cellular Respiration has a catabolic type of reaction. Plants and algae perform Photosynthesis. All living things on Earth use Cellular Respiration.

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