Glycoproteins are a type of conjugated protein.

• A. True
• B. False
• C. Not in animals
• D. Only in plants

Answer: (A)

Conjugated proteins are proteins that have a non-protein component covalently attached, which modifies their properties and functions. Glycoproteins are proteins with carbohydrate chains covalently linked to the polypeptide backbone, so they fit this definition. This carbohydrate attachment affects factors like solubility, stability, and cellular recognition, supporting roles in cell signaling, immunity, and mucus production. Because glycoproteins occur in a wide range of organisms, including both animals and plants, the idea that they’re not in animals or are exclusive to plants isn’t correct. Therefore, the statement is true.