Question

5. A student adds a suspension of baker's yeast cells into bread dough. After this mixture is left in a large bowl undisturbed for several hours, the student returns to find that the bread dough has doubled in size. Which gas molecule is responsible for this increase in dough size?

Answer 1

accumulation of carbon dioxide is responsible for the increase in dough size

Answer 2

The gas molecules responsible for the increase in dough size are carbon dioxide.

Step-by-step explanation:

Yeast feed of sugars by braking them into carbon dioxide, alcohol, other molecules, and energy. This process is known as fermentation. When fermentation occurs, carbon dioxide expands, helping the bread dough to increase. Yeast is also important to produce alcohol and gluten, both important to bake bread.