DR JEREMY BURGESS / SCIENCE PHOTO LIBRARY. DR JEREMY BURGESS / SCIENCE PHOTO LIBRARY.
Yeast. Coloured scanning electron micrograph of yeast cells, Saccharomyces cerevisiae, commonly known as baker's or Brewer's yeast growing on potato dextrose agar. Yeast is able to ferment sugar, producing alcohol & carbon dioxide in the process. It has long been used in the brewing of beer, the production of wine & in baking of leavened bread (carbon dioxide causes the dough to rise). Medically, it is used as a source of vitamin B1, riboflavin & nicotinic acid. Yeast divide rapidly by budding off new cells (visible here). They also reproduce sexually. Magnification X430 at 35mm, X3000 at 10x8 inch size.
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