What is the essence of the processes of energy metabolism?

Energy metabolism is the main property that is characteristic of any living organism. Energy metabolism is needed to ensure various vital processes of organisms. Autotrophs are able to synthesize glucose themselves. It is the main source of energy for living things. Heterotrophs cannot do this. Therefore, they eat autotrophs and other heterotrophs to obtain the necessary substances. Energy exchange consists of several stages. Energy itself is released during the oxidation of organic molecules in mitochondria.