Yeast

Yeast - single-celled microorganisms classified as members of the Kingdom Fungi. All the functions of a living organism like yeast breathing, reproduction, cell budding happen through the process of fermentation. The yeast species convert sugar into carbon dioxide and alcohol. Due to this process, the cells get all the necessary energy for their living. Anaerobic (without oxygen) fermentation of carbohydrates by yeasts leads to the production of alcohol.