Adenosine triphosphate (ATP) is a molecular compound that provides energy for all of the activities that occur inside of cells. The energy stored in ATP's phosphate bonds serves as a battery, permitting the cell to save and use energy in response to changing metabolic demands. Respiration is the biological process through which cells convert glucose into ATP, yielding the familiar waste products of carbon dioxide (CO2) and water. Part of respiration occurs in the cytoplasm of the cell, while the majority of ATP production occurs inside the mitochondria.

Terminal oxidation is final step of aerobic respiration & it takes place in the inner crystal membranes of mitochondria where the F1,elementary particles or Rakers particles are located.Presence of O2 is absolutely essential for this process of ATP manufacture,so the process is called oxidative phosphorylation.