Question

During alcoholic fermentation by yeast two molecules of glucose produce
a) 2 molecules of ethanol + 2 molecules of carbon dioxide
b) 4 molecules of ethanol + 4 molecules of carbon dioxide
c) 6 molecules of ethanol + 6 molecules of carbon dioxide
d) 3 molecules of ethanol + 3 molecules of carbon dioxide

Answer 1

Alcohol fermentation is the process in which yeast is used to convert glucose into ethanol, carbon dioxide and other by-products are also formed in this reaction. A single molecule of glucose yields two molecules of ethanol and two molecules of carbon dioxide each.

Complete Answer:
Yeast is used in the process of fermentation to produce alcoholic compounds. The alcoholic fermentation is the biochemical process. This process usually involves the formation of ethanol and carbon dioxide from sugar compounds such as glucose and fructose. A single molecule of glucose yields two molecules each of ethanol and carbon dioxide, so we can say that two molecules of glucose will yield four molecules each of ethanol and carbon dioxide. Fermentation is a slow and tedious process. It usually takes up to weeks for the fermentation to be carried out by the yeast. There are other types of fermentation also which includes lactic acid fermentation, alcoholic fermentation and acetic acid fermentation. The lactic acid fermentation is a process in which formation of lactic acid takes place in the anaerobic condition by the sugars. In the acetic acid fermentation, the formation of acetic acid takes place. The bacteria used in the cheese and buttermilk production are examples of lactic acid fermentation.
Thus, the right option is B.

Note: The alcoholic fermentation is used in the production of breads and alcoholic beverages. They are used in the formation of the wine and beer. Gin is also made using potatoes using the alcoholic fermentation.