Yeast is in the fungus family and, because of its cell-splitting capabilities, is self-reproducing. Yeast has a voracious appetite for sweet liquids and produces abundant quantities of alcohol (ethanol) and carbon dioxide in exchange for a good meal.
Yeast can also take credit for the classification of the beer style. Brewmasters pick a yeast according to the recipe or the style of beer they want to make. Yeast is identified as either an ale yeast or a lager yeast.
Yeast, in combination with different fermentation processes, can also contribute fruitiness and other flavor characteristics to the beer.
Brewmasters try to keep these flavors in check, depending on which beer style they’re brewing.
Yeast works hard but really enjoys itself. This little, single-cell organism, one of the simplest forms of plant life, is responsible for carrying out the fermentation process in beer making, thereby providing one of life’s simplest forms of pleasure.
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