Blood group antigens are protein molecules located on the cell membranes of ________.
A. leukocytes
B. clotting factors
C. thrombocytes
D. erythrocytes
Answer:D
Blood group antigens are protein molecules located on the cell membranes of ________.
A. leukocytes B. clotting factors C. thrombocytes D. erythrocytes
Explanation: A) Blood group antigens are not located on leukocytes.