First, let's define fermentation.

Fermentation is the process of releasing energy from a carbohydrate without oxygen by producing alcohol or lactic acid. In common usage, fermentation is a type of anaerobic respiration.

-Copyright Wikipedia 2007.

- The process of fermentation in the preparation of wine , vinegar , beer , and bread was known and practiced in prehistoric times .

- The alchemists used the terms fermentation, digestion and putrefaction indiscriminately.

- The chemical equation of Fermentation is : C6H12O6 + 2Pi + 2ADP- → Ethyl Alcohol + 2CO2 + 2 ATP

- When yeast ferments, it breaks down the glucose (C6H12O6) into two molecules of ethanol (CH3CH2OH) and two molecules of carbon dioxide (CO2).