During fermentation in Yeast cell, alcohol is fermented from _____ (a) Protein (b) Lipid (c) Sugar (d) Nucleic acids
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"During fermentation in Yeast cell, alcohol is fermented from (c) Sugar.
Sugar molecules are broken down into pyruvates by glycolysis. Due to lack of oxygen, yeast enters into fermentation process for producing NAD.
These pyruvate molecules are converted into carbon dioxide and acetaldehyde by pyruvate dehydrogenase. The acetaldehyde molecules, then react with NADH to form ethanol and NAD. This second step is catalysed by the enzyme alcohol dehydrogenase.
This has been used to produce various commercial alcoholic products such as beer and wine and fermented products such as bread.
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