Question

Saccharomyces cerevisiae is so important to humans because it

• A. Is responsible for most citric acid production
• B. Can be used as a model to understand many human diseases
• C. Uses sugars to produce CO${}_2$ during bread making
• D. Is responsible for almost all of the alcohol production worldwide

Answer 1

Answer: (C)

Uses sugars to produce CO${}_2$ during bread making

Saccharomyces cerevisiae is a species of yeast. It is perhaps the most useful yeast, having been instrumental in winemaking, baking, and brewing. Bakers yeast (Saccharomyces cerevisiae) is added to flour during kneading. Yeast secretes enzymes like amylase (change some starch to maltose), maltase (maltose to glucose), and zymase (glucose to ethyl alcohol and $C{O}_2$ ). The leavened dough is baked and the alcohol evaporates and $C{O}_2$CO is released as gas. The bread becomes soft and porous. Thus, the correct answer is option C.