Cody Van Wagner

photosynthesis and cellular respiration


Photosynthesis is a process used by plants and other organisms to convert light energy, normally from the Sun, into chemical energy that can be later released to fuel the plants and fungi activities. This chemical energy is stored in carbohydrate molecules, such as sugar, and or glucose which are synthesized from carbon dioxide and water.

Cellular respiration

  1. Cellular respiration is the process of oxidizing food molecules, like glucose, to carbon dioxide and water. The energy released is trapped in the form of ATP for use by all the energy-consuming activities of the cell. The process occurs in two phases: glycolysis, the breakdown of glucose to acid.

How the two are similar

  • They both involve the exchange of the gases; oxygen and carbon dioxide.

  • Both reactions transform energy in one way or another - either storing it or releasing it.
  • Both the processes are performed by endosymbiotic organisms that lived inside all eukaryotic cells (cells with a nucleus proper).

  • Photosynthesis is a system in plants that takes the sun's energy and creates food (mainly glucose). This process requires CO2 and water according to this general equation:
6CO2 + 6H2O + Energy → C6H12O6 + 6O2

This differs from cellular respiration in the fact that Oxygen and Glucose are reactants and Carbon dioxide and waters are products :
C6H12O6 + 6O2 --> 6CO2 + 6H2O + energy