21. In the ABO blood group system, antigenic determinants are: (A) nucleic acid (B) carbohydrate (C) lipid (D) protein
21. In the ABO blood group system, antigenic determinants are:
(A) nucleic acid
(B) carbohydrate
(C) lipid
(D) protein
Answer
Answer: (B) carbohydrate
Explanation: In the ABO blood group system, the antigenic determinants are specific carbohydrates present on the surface of red blood cells. They are not nucleic acids, lipids, or proteins.