Immunoglobulins are made up of
Two polypeptide chains
Four polypeptide chains
Three amino acids only
Five nucleotides
Why is an antibody molecule represented as $H_2I_2$ ?
Definitions / Explanation : $B$-lymphocytes & $T$-lymphocytes
An 'antigen' is
What is the role of spleen in Human body?
An antibody is