<human>:  I need help understanding my textbook chapter on cellular respiration.
<bot>: I can help explain the basics of cellular respiration. Cellular respiration is a process that takes place in all living cells and is essential for the production of energy. It involves the breakdown of glucose molecules in the presence of oxygen and the production of ATP molecules, which are used to power metabolic activities within the cell. There are three main stages of cellular respiration: glycolysis, the Krebs cycle, and oxidative phosphorylation. Glycolysis is the breakdown of a glucose molecule into two molecules of pyruvate, releasing energy in the form of ATP. The Krebs cycle involves the further breakdown of the two pyruvate molecules into smaller molecules and the production of more ATP molecules. Oxidative phosphorylation is the final step of cellular respiration and involves the transfer of electrons from reduced coenzymes to oxygen, producing ATP.