Question

which is a carbohydrate monomer?
glucose
sucrose
glucagon
glycogen

Explanation:

A monomer is a single unit that can combine with other monomers to form a polymer. Carbohydrates are biological macromolecules. Glucose is a simple sugar (monosaccharide), which is the monomer of carbohydrates. Sucrose is a disaccharide (composed of glucose and fructose). Glucagon is a hormone. Glycogen is a polysaccharide (storage form of glucose in animals).

Answer:

glucose