Question

Describe lactic acid fermentation ?

Answer 1

Lactic acid fermentation is a metabolic process by which glucose and other six-carbon sugars (also, disaccharides of six-carbon sugars, e.g. sucrose or lactose) are converted into cellular energy and the metabolite lactate, which is lactic acid in solution. It is an anaerobic fermentationreaction that occurs in some bacteria and animal cells, such as muscle cells.[1][2][3]

If oxygen is present in the cell, many organisms will bypass fermentation and undergo cellular respiration; however, facultative anaerobic organisms will both ferment and undergo respiration in the presence of oxygen.[3] Sometimes even when oxygen is present and aerobic metabolism is happening in the mitochondria, if pyruvate is building up faster than it can be metabolized, the fermentation will happen anyway.

Lactate dehydrogenase catalyzes the interconversion of pyruvate and lactate with concomitant interconversion of NADH and NAD+.

In homolactic fermentation, one molecule of glucose is ultimately converted to two molecules of lactic acid. Heterolactic fermentation, in contrast, yields carbon dioxide and ethanol in addition to lactic acid, in a process called the phosphoketolasepathway.[1]

Answer 2

Answer:

A metabolic fermentation process that occurs when lactose is formed from the conversion of glucose. Other carbon sugars which are six in numbers or the disaccharides also, gets converted into lactate.

This conversion produces cellular energy as a result of fermentation that is anaerobic. The whole process is known as lactic acid fermentation and occurs in muscle cells and some bacterias too.