3 Steps Of Cellular Respiration

This week in AP Biology we continued discussing cellular respiration once again. Since we have a quiz this week, we just reviewed about cellular respiration and the three steps of cellular respiration. These three steps are glycolysis, Kreb's Cycle ( citric acid cycle) and Electron Transport Chain (ETC). Each step works differently, but they each produce energy in the form of ATP. Glycolysis occurs outside the mitochindria and it breaks down glucose into two molecules called a pyruvate and also produces 2 ATP's and 2 NADH molecules.  The Kreb;s Cycle, which is also known as the citric acid cycle. The Kreb;s cycle occurs in the mitochondria where the pyruvates are transported and loses carbon dioxide to form acetyl CoA and later makes 2 ATP's, NADH and FADH. And finally ETC (also known as Oxidative Phosphorylation) also occurs in the mitochondria and it releases a large amount of chemical energy to produce about 34 ATP's. These are the three steps of cellular respiration.