<prompt> Glycoproteins are ?Proteins to which glucose is attachedCarbohydrate to which protein is attachedProtein to which lipid and glucose is attachedNone of the above  <response>: Glycoprotein are conjugated proteins. They consists of protein to which sho branched, oligosaccharides are covalently attached.Proteoglycans are carbohydrates to which small amount of protein is attached. Proteoglycans consists of 95 of carbohydrate and 5. 5 of protein. To know the structure of proteoglycans, one should know the structure of glycosaminoglycans. 