So glycolysis is the method by which they create ATP molecules and in order to continually create those ATP molecules our yeast cells as well as bacterial cells have to actually regenerate the NAD plus molecules. So in this type of fermentation basically Pyruvate is first or Pyruvate first undergoes the process of decarboxylation to produce acetyl aldehyde as well as the carbon dioxide. And then our acetyl aldehyde reacts with our NADH and an extra H ion to form our ethanol alcohol as well as our oxidized NAD plus. So this is exactly why we call it alcohol fermentation because we form ethanol. In fact, this is the method by which we actually synthesize alcohol that is then sold in bars and so forth. So we see that alcohol fermentation involves the process of glycolysis as well as this process here.