what is the role of fungus yeast in the production of bread and alcohol?

Answer 1

In bread, dough is treated with yeast. What yeast does is that it uses sugar, and produces Carbon dioxide. Carbon dioxide causes the bread to rise.

In alcohol, yeast and whatever else is placed in an anaerobic container- basically a place with no oxygen. Yeast will then undergo fermentation- where it converts the sugar into ethanol (the alcohol in drinks). Thus, yeast is what produces the alcohol in drinks.

Answer 2

in bread yeast makes the dough rise, this way it isn't flat and hard. in alcohol the yeast ferments it.