Which among the following microbe help in the production of beer and bread ?

Saccharomyces cerevisiae.

The correct answer is Option (2) - Saccharomyces cerevisiae .

Microbes especially yeasts have been used from time immemorial for the production of beverages like wine, beer, whisky, brandy or rum and is commonly called brewer’s yeast, is used for fermenting malted cereals and fruit juices, to produce ethanol.  Depending on the type of the raw material used for fermentation and the type of processing (with or without distillation) different types of alcoholic drinks are obtained. Wine and beer are produced without distillation whereas whisky, brandy and rum are produced by distillation of the fermented broth.

Saccharomyces is also used in bread making. Specifically, Saccharomyces cerevisiae is the yeast species most frequently employed in bread production. Yeast ferments the sugars present in dough, producing carbon dioxide gas, which causes the dough to rise. This process gives bread its light and airy texture.