Multiple choice In bread-making industry, ________ is used as a source of carbon dioxide. sugar dough yeast water Reveal answer Fill a bubble to check yourself C Correct answer Explanation In the baking industry, yeast is added to dough to perform fermentation. As the yeast consumes sugars, it releases carbon dioxide gas as a byproduct. This gas creates bubbles in the dough, causing it to rise and become light and fluffy.