Outline the types of bacterial fermentation pathways

Question

exam tomorrow!!!

Answer 1

try wikipedia.org

I really should know this,,,,,sorry essigsauere...cant translate,like sauerkraut

milkacid pathway,alkoholpathway and butteracidpathway, and I dont know the proper english words...try wikipedia

Answer 2

FERMENTATION

Fermentation can have a variety of meanings, ranging from informal to more scientific definitions. The various meanings of fermentation are nicely summarized by Tortora et al ( Microbiology, 6th Ed, 1998):

Any spoilage of food by microbes. For example, the spoilage of wine to vinegar. This is a very general usage of fermentation

Any process that produces alcoholic beverages or acidic dairy products (again general use)

Any large scale microbial process occurring with or without air (industrial use)

Any energy-releasing process that occurs only under anaerobic conditions (more scientific)

Any metabolic process that releases energy from a sugar or other organic molecule, does not need oxygen or an electron transport system, and uses an organic molecule as the final electron acceptor. It is this last definition that we will use.

Some other key points that we need to keep in mind are:

    * A complete fermentation pathway begins with a substrate, includes glycolysis and results in various end-products. The different fermentation pathways typically are named for the end products that are formed.

    * As far as an energy is concerned, fermentation does not generate ATP directly but recycles a limited amount of NAD+ back into glycolysis to keep glycolysis going. Recall that each pass through glycolysis generates 2 ATP molecules by substrate level phosphorylation.

    * All fermentation pathways are anaerobic.

    * Cells that are capable of both respiration and fermentation will typically use respiration when possible. Respiration yields more energy from a lot less substrate.

TYPES OF FERMENTATION PATHWAYS

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