Most Glycosaminoglycans (GAGs) Are Covalently Bound to a Core Polypeptide

Multiple Choice

Most glycosaminoglycans (GAGs) are covalently bound to a core polypeptide.One GAG, however, is usually found as a free polysaccharide without covalent protein attachment.This GAG is:

A) Chondroitin sulfate.
B) Dermatan sulfate.
C) Keratan sulfate.
D) Hyaluronic acid.
E) Heparan sulfate.