In cells, the glucose is broken down into [[1]] and [[2]] and energy is released. 

Cellular respiration occurs in the mitochondria, the cellular power plants, and is necessary for cell survival because it provides the energy required to carry out their functions.

The glucose molecule is broken down in cells via cellular respiration, a series of metabolic reactions.

This process results in the release of energy in the form of ATP (adenosine triphosphate), as well as carbon dioxide (CO2) and water (H2O).