Pasteur's finding showed that there are two types of fermentation: alcoholic and lactic acid. Alcoholic fermentation occurs by the action of yeast; lactic acid fermentation, by the action of bacteria.

Of these, few terms cause as strong reactions in both wine professionals and casual drinkers as “malolactic fermentation.” So what exactly does this complicated-sounding phrase mean ...

There are two types of respiration ... such as yeast complete their own version of anaerobic respiration called fermentation. This is the equation: glucose → ethanol + carbon dioxide Yeast ...