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Gluten in wheat flour - ancient or modern - makes it possible to make an elastic yeast-fermented dough.
The yeast cells in bread dough ferment sugars and produce gas (carbon dioxide). This makes the dough rise.
Yeast makes the crust rise.
It makes dough rise.
yeast is a microscopic organism that makes bread rise
it doesn't rise up because the yeast makes the bread expand.
Yeast makes the raw dough rise before cooking. In pretzels it does the same job. That's what makes them puffy.
Yeast are tiny animals. When they eat, they release carbon dioxide. That "inflates" the dough.
Yeast feeds on the sugar present in the dough and releases a gas as a byproduct which makes the dough rise. Heat will initially cause the yeast to multiply rapidly, but then die off.
yeast makes the bread rise, expanding the air in the dough. The density of the dough basically stays the same, but the 'softness' is actually the air formed by the yeasts waste (CO2)
Yeast dough is dough (basically a mixture of flour, water, salt) to which yeast (a form of fungi) has been added to cause the dough to 'rise', add in dimension by filling the dough with carbon dioxide given off by the yeast. Dough without yeast does not expand.
I'm pretty sure its the yeast that makes it rise. did you know that yeast is actually a living organism? its alive.