Question

AB blood group is known as ‘universal recipient’.

• A. True
• B. False

Answer 1

The correct option is A

True

The gene that encodes the enzyme, designated I, has three common alleles: $I^B$, whose product adds galactose; $I^A$, whose product adds galactosamine; and the recessive i, which codes for a protein that does not add a sugar. Thus blood group O individuals produce antibodies against both A and B antigens. Group AB, however, contains red blood cells that have both antigens, A and B and thus does not have reactive antibodies in its plasma to either of these antigens. Therefore an individual with the AB blood group can receive blood from any of the other groups A, B or O and is called the universal recipient.