Photosynthesis and Cell Respiration

By: Will Nease

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Photosynthesis and Cellular respiration are opposite cycles, one creates energy, in the form of Glucose, the other breaks down glucose, and turns it into energy. The Photosynthesis cycle breaks down Water and Carbon Dioxide to create Glucose and Oxygen, with the help of Sunlight. Cellular Respiration takes place by splitting up Glucose, and Oxygen to produce Carbon Dioxide and ATP energy.


Photosynthesis is the process of using light energy to turn Water, and Carbon Dioxide into Glucose and Oxygen. Photosynthesis starts when the Thylakoids capture light in the Chloroplasts. That energy splits up the reactants (6 water molecules and 6 Carbon Dioxide molecules), and turns it into the products (1 molecule of Glucose, which is sugar, as well as 6 molecules of Oxygen). Photosynthesis takes place only in plant cells.

Cellular Respiration

Cellular Respiration is a process that takes place in both plant and animal cells, in the Mitochondria, which releases energy stored in sugars, and turns them into ATP. This takes place in the mitochondria, where 1 Glucose molecule, and 6 Oxygen molecules are split up, then arranged into 6 Carbon Dioxide Molecules, 6 Water molecules, and energy (ATP). It is the opposite of the Photosynthesis cycle, because the products and reactants are flipped.



Reactants: 6 CO2 (Carbon Dioxide), 6 H2O (Water)

Products: C6H12O6 (Glucose), 6 O2 (Oxygen)

6 CO2 + 6 H2O --> C6H12O6 + 6 O2

Cell Respiration

Reactants: C6H12O6 (Glucose), 6 O2 (Oxygen)

Products: 6 CO2 (Carbon Dioxide), 6 H2O (Water), Adenosine Triphosphate (ATP Energy)

C6H12O6 + 6 O2 --> 6 CO2 + 6 H2O + ATP



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