Immune System
Macrophages are professional antigen- presenting cells. The protein molecule through which they present antigen in human is

HLA
CD8
actin
interleukin

ANSWER DOWNLOAD EXAMIANS APP

Immune System
Numerous antibodies can be prepared, against one antigen, each binds to unique epitopes. How is this antibody diversity generated?

By rearrangements of the DNA encoding the variable regions of the heavy and light chains
By the combination of different heavy and light chains that form the antigen binding site
Antibody proteins can physically change their shape to bind different epitopes
Both (a) and (b)

ANSWER DOWNLOAD EXAMIANS APP