sentence: Yeast is a common leavening agent.
sentences_after: It is a fungus that converts sugar to ethanol and carbon dioxide. The carbon dioxide makes the bread rise. This is slower and makes the bread more soft. Most of the ethanol evaporates when the bread is baked. The yeast is also killed when the bread is baked.
concept_name: yeast
headings: Leavening agent Yeast
categories: Baking