Budding yeast cell. Coloured transmission electron micrograph (TEM) of a section through a budding yeast cell, Saccharomyces cerevisiae. Cytoplasm is red, vacuoles yellow, cell walls green and nuclei dark blue. Also known as baker's or brewer's yeast, this fungus consists of single vegetative cells. The larger mother" cell (upper left) is reproducing asexually by budding off a daughter cell (lower right). S. cerevisiae ferments certain sugars, producing alcohol and carbon dioxide in the process. It is used in the brewing of beer, the production of wine and in the baking of leavened bread, as it causes the dough to rise. Magnification: x7500 at 35mm size."