During the process called Oxidative Phosphorylation, which occurs in the inner mitochondrial membrane, energy is collected from the breakdown of carbohydrates as well as fats. During oxidative Phosphorylation, electrons which are obtained from NADH and FADH2 along with O2 and energy released during oxidation are used to separate the synthesis of ATP from ADP
In order to extract energy, it must pass many processes and by the passing of electrons through carriers which make up the electron transport chain.
Electron transport is the main process at which cellular respiration takes place in mitochondria. Electron transport is coupled to ATP synthesis, where the complexes I, III, and IV passes the electrons until it reaches the ATP synthase. The passage of electrons serves to generate a proton gradient across the inner mitochondrial membrane that helps ATP synthase to catalyze the synthesis of ATP.
