DR GOPAL MURTI / SCIENCE PHOTO LIBRARY DR GOPAL MURTI / SCIENCE PHOTO LIBRARY
Yeast cells. Coloured transmission electron micrograph (TEM) of a section through yeast cells, Saccharomyces cerevisiae, including one that is budding. 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 (centre left) is reproducing asexually by budding off a daughter cell (bottom centre). 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: x5000 at 35mm size.
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