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Which of the following disaccharides does not consist of two glucose units?(a) Trehalose(b) Cellobiose(c) Isomaltose(d) LactuloseThis question was posed to me in an internship interview.This intriguing question comes from Biomolecules Carbohydrates in portion Biomolecules of Chemistry – Class 12

Answer»

The correct answer is (d) Lactulose

To elaborate: Lactulose is a disaccharide which is composed of two DIFFERENT MONOSACCHARIDE UNITS namely, galactose and fructose. Whereas trehalose, CELLOBIOSE and isomaltose are disaccharides CONSISTING of two glucose units.



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