Immunoglobulins are made up of
Two polypeptide chains
Four polypeptide chains
Three amino acids only
Five nucleotides
The principle of Vaccination and Immunization is based on which property?
The thymus is a lobed organ located near the $...A...$ and beneath the $...B... $ The most appropriate combination for $\mathrm{A}$ and $\mathrm{B}$ is
............. Technology is useful in Vaccines production
Physical barrier = .............. and physiological barrier = .............
What is the role of spleen in Human body?