Question

By which process does yeast produce the dioxide responsible for bread rising

Answer 1

Yeast produces carbon dioxide responsible for bread rising through the process of fermentation. During fermentation, yeast metabolizes sugars (present in the dough) anaerobically (without oxygen) to convert those sugars into alcohol and carbon dioxide gas. The carbon dioxide gas gets trapped in the dough, causing it to expand and rise, resulting in the light and airy texture of the bread. This process is also responsible for the flavor development in the bread. After baking, the alcohol evaporates, leaving the desired taste and texture.