When making bread,you first "proof" the yeast by mixing with sugar in lukewarm water.Assuming that the yeast are alive,what happens next and why?
A) The water will become cloudy as the flagellated yeast cells swim around.
B) The yeast will germinate and start to form a mycelium.
C) Bubbles form as the yeast ferment the sugar and release carbon dioxide.
D) Bubbles form as the yeast produce sugar and release oxygen.
E) Nothing could happen, since yeast are not living organisms.

Question

Quizplus · Accepted Answer

When yeast are mixed with sugar in lukewarm water, they begin to ferment the sugar and release carbon dioxide. This is what causes bubbles to form, which is an indication that the yeast are active and alive. The carbon dioxide is what makes bread dough rise, creating a light and airy texture.

When Making Bread,you First "Proof" the Yeast by Mixing with Sugar