And there the electrons are extracted from the NADH to form the NAD plus. And electrons are also used to actually generate ATP molecules. So the question that I'd like to focus on in this lecture is how exactly do the NADH molecules produced in the process of glycolysis actually get to the electron transport chain? So once again, under aerobic conditions, NADH molecules produced in glycolysis must be transported into the mitochondria. Why? Well, because the cell must use the NADH molecules to not only produce ATP molecules, but to also regenerate the NAD plus Co enzyme that is needed for glycolysis to actually continue taking place.