ATP

Cellular respiration is a cycle that occurs in both plant and animal cells. However, note that it does not occur in prokaryotic cells for they lack organelles. The first stage of cell respiration takes place outside the mitochondria and is called glycolosis. Here, glucose is converted to two pyruvates. Then through the Krebs Citric Acid Cycle, the pyruvate is changed to Acetyl-CoA and creates more ATP. Finally, the electron chain results in hydrogen ions being pumped out and then forced to diffuse back and in doing so, produce ATP through facilitated diffusion. In this manner, eukaryotic cells create ATP to power their cells.