Oxidative phosphorylation is a vital process that occurs within the mitochondria of eukaryotic cells, enabling the generation of adenosine triphosphate (ATP), the primary energy currency of cells. It involves the coupling of electron transport and ATP synthesis through the establishment and utilization of a proton gradient across the inner mitochondrial membrane. In this article, we will explore the intricate process of oxidative phosphorylation, its key components, and its significance in cellular energy production.