Also known as simple sugars, these are the carbohydrate monomers.

• A. monosaccharide
• B. polysaccharide
• C. disaccharide
• D. glycogen

Answer: (A)

Simple sugars are the basic building blocks of carbohydrates. Monosaccharides are single sugar units, the carbohydrate monomers that can join together to form larger molecules. Examples like glucose, fructose, and galactose illustrate why they’re called monomers—they’re the simplest, smallest sugar units from which more complex carbohydrates are built. When two monosaccharides link, you get a disaccharide (such as sucrose or lactose); when many join, you get a polysaccharide (like starch, cellulose, or glycogen). Glycogen, in particular, is a storage polysaccharide in animals, not a single sugar unit. So the statement points to monosaccharides as the carbohydrate monomers.