EVERYDAY SCIENCE

Detailed explanation-1: -Yeast feeds on the sugar contained with the dough, producing carbon dioxide and alcohol, in a process called fermentation. During bread making, the dough is left in a warm place. The warmth causes fermentation to take place.

Detailed explanation-2: -Bread isn’t alcoholic, but the same process that gives wine its delightful alcoholic kick is what gives bread its airy texture and signature rise. The process is almost identical to alcoholic fermentation: Yeast eats sugar and releases carbon dioxide.

Detailed explanation-3: -Alcoholic fermentation is carried out by yeasts and some other fungi and bacteria. The first step of the alcoholic fermentation pathway involves pyruvate, which is formed by yeast via the EMP pathway, while it is obtained through the ED pathway in the case of Zymomonas (bacteria).

Detailed explanation-4: -Alcoholic fermentation is the process that causes bread dough to rise. When yeast cells in the dough run out of oxygen, the dough begins to ferment, giving off tiny bubbles of carbon dioxide.

Detailed explanation-5: -During fermentation, yeast cells convert cereal-derived sugars into ethanol and CO2. At the same time, hundreds of secondary metabolites that influence the aroma and taste of beer are produced. Variation in these metabolites across different yeast strains is what allows yeast to so uniquely influence beer flavor.