So let's begin with Fadh two and NADH molecules. These two molecules, once we form them in the beta oxidation process, they move on onto the electron transport chain. And remember from our previous discussion that we said a single Fadh two molecule generates about 1.5 ATP molecules while a single NADH molecule generates 2.5 ATP molecules. Now, what about the acetyl coenzyme A molecule? Well, the acetyl coenzyme A molecules, once they're formed in the beta oxidation process, they are incorporated into the citric acid cycle. And remember that a single acetyl coenzyme A molecule that is fed into the citric acid cycle generates three NADH molecules, one Fadh two molecule and one GTP molecule.