They are used in winemaking , baking , pickling and other food - making processes . Alcoholic fermentation by yeast is widely used in the preparation of wine and bread . A bacterium Lactobacillus promotes the formation of curd . Microbes are used to reduce pollution . They are used to increase soil fertility by fixing atmospheric nitrogen . Microbes are also useful in preparing many medicines and antibiotics . Certain microbes are also used in the biological treatment of sewage and industrial effluents . Some microorganisms are taken as probiotics , that are believed to provide health benefits when consumed . Bacteria are also involved in making cheese . Acetobacter acetic is used for producing acetic acid from alcohol
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They are used in winemaking , baking , pickling and other food - making processes . Alcoholic fermentation by yeast is widely used in the preparation of wine and bread . A bacterium Lactobacillus promotes the formation of curd . Microbes are used to reduce pollution . They are used to increase soil fertility by fixing atmospheric nitrogen . Microbes are also useful in preparing many medicines and antibiotics . Certain microbes are also used in the biological treatment of sewage and industrial effluents . Some microorganisms are taken as probiotics , that are believed to provide health benefits when consumed . Bacteria are also involved in making cheese . Acetobacter acetic is used for producing acetic acid from alcohol