One classic example of biochemistry is the process of cellular respiration. This complex series of biochemical reactions occurs in the cells of organisms to convert glucose and oxygen into energy, carbon dioxide, and water.
Cellular respiration involves several stages, including glycolysis, the Krebs cycle, and oxidative phosphorylation. In glycolysis, glucose is broken down into pyruvate, yielding small amounts of ATP (the energy currency of cells). The Krebs cycle then processes pyruvate to release stored energy, which is harnessed in the form of ATP through oxidative phosphorylation. This entire process illustrates how biochemical pathways facilitate the conversion of nutrients into energy, supporting the biological functions necessary for life.