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 dies under the heat of baking, and the gasses it produced expand to make the bread rise further.
Contain Ascospores
Yeast added to bread dough produces a gas, and this causes the dough to rise, making the finished bread look like a sponge.
Umm, I'm sure bread can rise at any time, as long as there is yeast in it that makes it rise when you bake it.
Yeast is a leaven. A chemical reaction between the yeast and water creates tiny gas bubbles, making dough expand.
Yes, they actually smell like yeast--kind of like freshly-baked bread, or anything else made with yeast.
Baking powder and yeast help in the rising of a bread or cake. If it is expired, then it won't be as "active" and therefore decreasing it's ability to rise which makes for a poor bread or cake.
Yeast added to bread dough produces a gas, and this causes the dough to rise, making the finished bread look like a sponge.
The most reliable method of shortening the time of baking yeast bread would be to shape the bread in several small loaves or buns rather than baking it in a single large loaf. It is also possible to increase the baking temperature, but that runs the risk of scorching the crust, or producing an undesirably hard, dry bread. It is also possible to bake yeast bread in the microwave, but that is tricky and requires quite a bit of skill.
yeast is in the bread
it actually consists of tiny microorganisms like bacteria. when you put sugar into the thing you are baking, the yeast feeds on it. when you bake it, the yeast produces gasses before being vaporized by the intense heat. this is why bread has air bubbles in it!
See more date 4000 BC: the Egyptians discovered how to bake leavened bread using yeast.