ASPEN Certified Nutrition Support Clinician (CNSC) Practice Exam

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Disaccharides consist of how many sugar units?

One

Two

Disaccharides are made of two sugar units joined by a glycosidic bond. The prefix di- means two, which is why these carbohydrates consist of two monosaccharide units. Examples include sucrose (glucose plus fructose), lactose (galactose plus glucose), and maltose (two glucose units). This distinguishes them from monosaccharides, which are single sugar units, and polysaccharides, which are made of many. So disaccharides contain two sugar units.

Three

Four

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