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When mixed, the yeast reacts with the salt and the sugar.
It feeds on sugar
Yeast is added to bread along with moisture and sugar, and the dough is kept in a moist, warm environment. During this rising time, the yeast consumes the sugar in the dough and release CO2 gas, which is trapped in the dough and causes the dough to rise. When the dough is baked, the yeast is killed, but the bubbles created by the gas remain.
Dough of bread contains yeast. Yeast reacts with sugar to give water and Carbon Dioxide (CO2). After baking CO2 escapes from dough which makes holes to bread.
Sugar is added to the liquid in which the yeast is dissolved as an easily digested food for the yeast. As the yeast digests the sugar it produces gas which causes the bread dough to rise.
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Yeast is made up of microorganisms (fungi) that feed on starches and sugar, producing gas that makes dough rise. Yeast can digest sugar quicker than starches, so rises faster when sugar is included.
when bakers started adding yeast to the dough. the earliest known reference to leavened bread is from ancient Egypt around 5000 years ago.
It makes dough rise.
Bread is not "formed" by microorganisms. However, yeast is added to bread dough as leavening. The yeast, consisting of many billions of microorganism, consume and digest sugars in the dough which produces gas. The gas bubbles cause the bread dough to expand or "rise."
Yeast are tiny microscopic animals. Yes, ANIMALS. When you put sugar in bread, yeast eat the sugar and release Carbon Dioxide, causing the gas pockets to make the dough rise.
The yeast cells in bread dough ferment sugars and produce gas (carbon dioxide). This makes the dough rise.