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The presence of buds indicate that yeast is reproducing.
No, combining yeast with sugar will not produce gas. Yeast must be dissolved in water with starch or sugar in order to begin fermentation producing CO2 gas.
Beer does contain ethyl alcohol (ethanol). Beer is made from water, barley, hops, and yeast. The water and barley are mashed to produce sugars that the yeast metabolizes to produce ethanol. Beer yeast can produce alcohol levels from 2.5-18% alcohol by volume.
Yeast will produce gas if sugar, water, and warmth are available as long as the yeast is still alive. If it is too old or has been too hot and the yeast has died it won't create the gas.
Warm, not hot, water will activate yeast causing them to produce carbon dioxide which causes breads to rise
No. Sugar and a fermenting agent eg yeast is needed to produce alcohol.
Yeast can be killed with heat, that is why you use warm water to start it, not hot.
Yeast cannot produce their own foods. The yeast do not have chlorophyll. Yeast must rely on other ways and sources to get food. Yeast mostly feed on sugar.
No Yeast cells produce spores which serve the same function as seeds
Yeast can produce more that 30 o/o or more
Yeast must be a producer since it produce food by itself.It has chlorophyll pigment to produce it's own food.
These yeast cultures produce uniform, predictable results