what is yeast

Yeast is a single-celled microorganism classified as a member of the fungus kingdom. It is a living organism that converts sugar and starch into carbon dioxide and alcohol through fermentation. Yeast is essential in baking bread, brewing beer, and winemaking. The most common type of yeast is Saccharomyces cerevisiae, and there are over 1,500 recognized species. Yeast has been used for various purposes, including food production, biofuel generation, and microbial fuel cells