When yeast respire anaerobically, it converts simple sugar to carbon (IV) oxide and

Assessment: JAMB UTME - Biology - 2001 Subject: Biology

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When yeast respire anaerobically, it converts simple sugar to carbon (IV) oxide and
Answer Details
When yeast respires anaerobically, it converts simple sugar into carbon dioxide and alcohol. Anaerobic respiration occurs in the absence of oxygen, so instead of using oxygen as an electron acceptor, yeast uses another molecule such as pyruvate. The process is called alcoholic fermentation, and it converts glucose, a simple sugar, into two molecules of pyruvate, which is then converted into alcohol and carbon dioxide. The alcohol produced is usually ethanol, which is commonly used in the production of beer, wine, and bread. The carbon dioxide produced is responsible for the bubbles in beer and the rise in bread dough.
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