Question

proteoglycans are composed of
multiple choice
carbohydrates and fats
nucleic acids and fats
carbohydrates and proteins
proteins and fats
nucleic acids and proteins

Explanation:

Proteoglycans are macromolecules. The term "proteoglycan" has "protein" as a root part, indicating the presence of proteins. Glycans refer to carbohydrate - containing moieties. So, proteoglycans are composed of carbohydrates (glycans) and proteins.

Answer:

carbohydrates and proteins