Cellular Respiration
Cellular Respiration Cellular respiration is the process by which cells produce the energy they need to live. ... Cellular respiration is an on going cycle that cells and ultimately the organisms they form will die without. Cellular respiration occurs in four stages: glycolysis, transition, the Krebs or citric acid cycle, and the electron transport chain. ... Mitochondria Picture from Encarta These acetyl coenzyme A molecules enter the third stage of cellular respiration, the Kreb’s cycle. ... Cellular respiration is a very efficient way of transferring energy.