What is the name of microorganism present in beer?

The microorganism present in beer are yeast. Yeasts are single-celled fungi that are responsible for the fermentation of beer. They convert the sugars in the beer wort into alcohol and carbon dioxide. The type of yeast used in brewing will determine the flavor and aroma of the beer.

There are two main types of yeast used in brewing:

* Saccharomyces cerevisiae is the most common type of yeast used in brewing. It is responsible for the fermentation of most ales and lagers.

* Saccharomyces pastorianus is a type of yeast that is used in the fermentation of some lager beers. It produces a cleaner flavor and aroma than S. cerevisiae.