Cellular respiration represents the process by which cells gather the biochemical energy from food and convert it into a form that can be used later, in all cellular activities. Through cellular respiration, which is a catabolic pathway, the adenosine triphosphate (ATP) is produced.
The chemical equation that describes the cellular respiration is the following:
`6H_2O + 6O_2 + C_6H_12O_6 (glucose) -> 12H_2O + 6CO_2`
The process of cellular respiration occurs in two stages:
- glycolysis reaction (glucose breakdown)
- oxidation reaction (glucose is converted to pyruvic acid, that is broken down in water and carbon dioxide)
The energy is released when the sugar molecule is broken down into it's components, such as water and carbon dioxide. Since the reaction result is energy, then the reaction is classified as exergonic.