Which has about 10-40% carbohydrate content?

• A. Glycoproteins
• B. Mucoproteins
• C. Proteoglycans
• D. Lipoproteins

Answer: (A)

Carbohydrate content varies widely among protein-based macromolecules. Glycoproteins are proteins with covalently attached carbohydrate chains, giving them a noticeable but moderate sugar content. In many glycoproteins, carbohydrates constitute roughly 10–40% of the molecule by weight.

In contrast, mucoproteins (mucins) are heavily glycosylated, with a large carbohydrate portion that often exceeds this range, sometimes dominating the dry weight. Proteoglycans also carry extensive carbohydrate by virtue of long glycosaminoglycan chains, typically resulting in high carbohydrate content. Lipoproteins have lipids as the major component, with only a relatively small amount of carbohydrate.

So, the 10–40% range best matches glycoproteins.