What is yest and why it added in bread?

Yeast is a type of fungus that is used as a leavening agent in bread. It is a single-celled organism that feeds on the sugars in flour and converts them into carbon dioxide gas and alcohol. This gas causes the dough to rise, resulting in a light and fluffy texture.

There are two main types of yeast used in bread baking: active dry yeast and instant yeast. Active dry yeast needs to be dissolved in warm water before it can be used, while instant yeast can be added directly to the flour.

Yeast is an essential ingredient in bread baking, and it is responsible for the characteristic flavor and texture of bread. Without yeast, bread would be flat and dense.

Here are some additional reasons why yeast is added to bread:

* Yeast helps to improve the digestibility of bread. The fermentation process that yeast undergoes breaks down the gluten in flour, making it easier to digest.

* Yeast adds flavor to bread. The yeast produces a variety of compounds during fermentation, including esters, alcohols, and acids. These compounds contribute to the characteristic flavor of bread.

* Yeast helps to preserve bread. The alcohol that yeast produces during fermentation inhibits the growth of bacteria and mold, which helps to keep bread fresh for longer.