Yeast cells. Coloured scanning electron micro- graph (SEM) of budding yeast cells (yellow, Saccharomyces cerevisiae). Known as baker's or brewer's yeast, this fungus consists of single vegetative cells. The larger mother" cells are budding off smaller daughter cells in cell division. Saccharomyces cerevisiae is able to ferment sugar, producing alcohol and carbon dioxide in the process. It has long been used in the brewing of beer, production of wine, and in baking leavened bread (causing the dough to rise). Magnification: x2, 700 at 5x7cm size. x6800 at 6.75x4.75""