Proteoglycans Are Macromolecules That Form Gels, Which Help Hold Cells

Proteoglycans are macromolecules that form gels, which help hold cells and tissues together, lubricate joints, and account for the tough rubbery texture of cartilage.Proteoglycans are composed of

A) carbohydrates and fats.
B) nucleic acids and fats.
C) carbohydrates and proteins.
D) proteins and fats.
E) nucleic acids and proteins.