Does anyone know why yeast and bacteria go through fermentation? Please give a simple answer. Thanks!?

anaerobic respiration

Does anyone know why yeast and bacteria go through fermentation? Please give a simple answer. Thanks!?
All living organisms convert sugars and oxygen into energy, and as a result produce waste by-products. Yeast and bacteria are no exceptions, but they do not "go through" fermentation. Fermentation is the term used to apply to the result of this cellular digestive process. The result is either alcohol, in the case of the yeast, or another chemical in the case of the bacteria. The result of the fermentation process using yeast gives us beer, wine and other alcohols. The results of the fermentation process of bacteria can result in anything from your favorite cheese to a case of botulism poisoning and almost certain death.
Reply:Fermentation is a metabolic process that allows yeast and bacteria (and our muscle cells!) to survive when there is no oxygen present.





The first step, called glycolysis, produces 2 molecules of pyruvic acid, makes 2 ATP molecules, and it reduces 2 NAD+ molecules to NADH. In aerobic respiration, NADH is oxidized back to NAD+, the electrons and protons are passed to oxygen to make water, and the energy from that process goes to the electron transport chain to make more ATP. Without oxygen gas, the cell needs come way to regenerate the NAD+. The reduction of pyruvic acid to lactic acid or to alcohol and carbon dioxide allows NADH to be oxidized to NAD+ to keep glycolysis running.





(Note: anaerobic respiration is *not* the same as fermentation! Anaerobic respiration also uses an electron transport chain to make ATP, but the final electron acceptor is not oxygen.)
Reply:i don`t really know but most the time if you get a yeast infection in the vaginal area it`s because you have an inbalance. Like if you eat too much sugar or if anything with sugar in it is anywhere near that area then you can get a yeast infection.
Reply:The purpose of anearobic respiration is to create energy for the cell's use. Human cells do the same thing after they have used up all the ATP created in aerobic respiration. For example, when you exercise, your body is using lots of oxygen, so there is a need to respire anaerobically after a certain period of time. The fermentation that occurs during this process creates a build up of lactic acid. That's why your muscles are sore the next morning. It's basically just all about energy. Yeast need energy too. It just so happens that God made them to do it without oxygen.