Use the Figure Below to Describe Four Types of Fermentation

Question

Examlex · Accepted Answer

The Answer is Amino acids, product of protein hydrolysis, are the substrate for alkaline fermentation [i]; ammonia, a byproduct [ii], raises pH and prevents microbial growth. An example is dawadawa, a paste of fermented beans common in West Africa. [iii] Glucose is converted to pyruvic acid, which is then converted to lactic acid. Acetyl-CoA [iv], also a product of alkaline fermentation, may be used as a respiratory substrate or converted to acetic acid, widely used in pickling. Pyruvic acid is a precursor in many types of fermentation. In lactic acid fermentation, lactic acid is produced from pyruvate, as in cheeses. Propionic acid can be formed from lactic acid by further fermentation, as in Swiss cheese. Heterolactic fermentation (v) results in the production of lactic acid, ethanol, and carbon dioxide, as in sauerkraut. Ethanolic fermentation results in the production of ethanol and carbon dioxide, as in beer.

Use the Figure Below to Describe Four Types of Fermentation

Definitions: