Difference Between Respiration And Combustion: Following are the points of difference between Respiration and Combustion or Burning. Respiration Combustion It occurs inside cells i.e. intracellular process. It is a non-cellular process. It is under biological control. Combustion is an uncontrolled process. Respiration is a biochemical process. Combustion is a Physico-chemical process. Energy is released in