Lactic acid fermentation can be defined as a metabolic process by which glucose or other six-carbon sugars are converted into cellular energy and the metabolite lactate, which is the lactic acid in solution.
Lactic acid fermentation can be described as a metabolic process by which glucose or disaccharides of six-carbon sugars such as sucrose or lactose are converted into cellular energy and the metabolite lactate.
This process is an anaerobic fermentation reaction that happens in some bacteria and animal cells, such as muscle cells. In many organisms, if oxygen is present in the cell will bypass fermentation and continue with cellular respiration.
However, facultative anaerobic organisms will undergo both fermentation and respiration in the presence of oxygen. Sometimes when oxygen is present and aerobic metabolism is occurring in the mitochondria, if pyruvate is growing up faster than it can be metabolized, the fermentation will occur anyway.
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