Which statement is true about monosaccharides?

• A. They are complex lipids
• B. They are simple sugars
• C. They are nucleic acids
• D. They are proteins

Answer: (B)

Monosaccharides are the simplest carbohydrates—the basic sugars from which more complex carbohydrates are built. They include examples like glucose, fructose, and galactose, and they’re small, water-soluble molecules that can join to form disaccharides and polysaccharides. Because of this, the true statement is that monosaccharides are simple sugars. They are not lipids, nucleic acids, or proteins, which are other distinct types of biological macromolecules with different roles: lipids store energy and form membranes, nucleic acids carry genetic information, and proteins perform a wide range of cellular functions.