Illustrated Glossary of Organic Chemistry

Monosaccharide (simple sugar; simple carbohydrate): A carbohydrate that cannot be hydrolyzed into two or more simpler carbohydrates.


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D-Glucopyranose is not broken down into two or more carbohydrates upon hydrolysis, so D-glucopyranose is a monosaccharide.



Lactose hydrolysis yields one molecule each of D-galactopyranose and D-glucopyranose, so lactose is a disaccharide.

Amylose hydrolysis yields many molecules of D-glucopyranose, so amylose is a polysaccharide.