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yeast

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yeast

One of various single-celled fungi (see fungus) that form masses of tiny round or oval cells by budding. When placed in a sugar solution the cells multiply and convert the sugar into alcohol and carbon dioxide. Yeasts are used as fermenting agents in baking, brewing, and the making of wine and spirits. Brewer's yeast (S. cerevisiae) is a rich source of vitamin B. (Especially genus Saccharomyces; also other related genera.)

In April 1996 the sequencing of the genome of S. cerevisiae was completed, following six years of research by 300 scientists. S. cerevisiae has over 12 million base pairs and approximately 6,000 genes, the function of 40% of which are yet to be identified.
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? Mentioned in ? References in classic literature
 
Without moving and being part of the yeast there would be no hopelessness.
The Sea Wolf by London, Jack View in context
It was some time before the perfect loaf appeared, for bread-making is an art not easily learned, and Aunt Plenty was very thorough in her teaching; so Rose studied yeast first, and through various stages of cake and biscuit came at last to the crowning glory of the "handsome, wholesome loaf.
Eight Cousins by Alcott, Louisa May View in context
She taught the cook how to make yeast from the milk, that, in turn, raised light and airy bread.
Adventure by London, Jack View in context
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