Question

O blood group can be given to persons with blood group
(a)AB
(b)B
(c)A
(d)A, B, AB or O

Answer 1

Hint: A person with blood group O is said to be a universal donor whereas a person with AB blood group is called a universal recipient. A person who has blood group O does not have any antigens present on the plasma membrane of his red blood cells (RBC).

Complete Answer:
O blood group can be given to persons with blood groups A, B, AB, or O which means O blood group can be given to all the other blood groups. This is because O group blood does not have any antigens on the membrane of RBC and thus are not attacked by the antigens released by people having blood groups A, B, AB, or O. But a person with an O blood group can only receive blood from another O group person. This is because of the fact that O group produces antibodies A and B and will destroy RBC that are given by people with blood group A, B, and AB.

Additional information:
Let us understand the process of ABO blood grouping in detail.
-A person with blood group A has antigen A and antibody B in his blood and can donate to blood groups A and AB
-A person with blood group B has antigen B and antibody A in his blood and can donate to blood groups B and AB.
-A person with blood group AB has both antigens A and B but no antibodies in his blood and thus such a person can accept blood from any blood group as there as no antibodies to attack the other blood.
-A person with blood group O has no antigens but contains both antibodies A and B and thus can donate blood to any other blood group.

So, the correct option is ‘A, B, AB or O’.

Note:
-There are three alleles coding for the blood group in humans and thus it comes under multiple allelism.
-The allele ‘${ I }^{ A }$’ causes A antigen, allele ‘${ I }^{ B }$’ causes B antigen whereas allele ‘i’ results in no antigen.
-The alleles ‘${ I }^{ A }$’ and ‘${ I }^{ B }$’ are completely dominant over ‘i’ but codominant over each other.
-Another type of blood grouping is seen in humans known as the Rh blood grouping.