Multiple choice

Which among the following is not a polysaccharide?

  1. Galactose

  2. Starch

  3. Cellulose

  4. Glycogen

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A Correct answer
Explanation

Galactose is a monosaccharide. When combined with glucose, through a dehydration reaction, the result is the disaccharide lactose. The hydrolysis of lactose to glucose and galactose is catalyzed by the enzyme lactase and β-galactosidase. This enzyme is produced by the lac operon in Escherichia coli.

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