Which of the following is not a monosaccharide?

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Multiple Choice

Which of the following is not a monosaccharide?

Explanation:
Monosaccharides are the simplest carbohydrates, consisting of a single sugar unit. Glucose, fructose, and galactose are all monosaccharides; each is one sugar molecule. Sucrose is not a monosaccharide because it’s made from two sugar units—a glucose molecule linked to a fructose molecule—making it a disaccharide. In digestion, enzymes hydrolyze disaccharides into their component monosaccharides, whereas monosaccharides remain as single units. So the substance that is not a monosaccharide is the one that contains two sugar units.

Monosaccharides are the simplest carbohydrates, consisting of a single sugar unit. Glucose, fructose, and galactose are all monosaccharides; each is one sugar molecule. Sucrose is not a monosaccharide because it’s made from two sugar units—a glucose molecule linked to a fructose molecule—making it a disaccharide. In digestion, enzymes hydrolyze disaccharides into their component monosaccharides, whereas monosaccharides remain as single units. So the substance that is not a monosaccharide is the one that contains two sugar units.

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