Immune System
Which of the following proteins would not need localization signal?

A protein bound to the endoplasmic reticulum (ER) membrane
A cell surface protein
A nuclear protein
A cytosolic protein

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?

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

ANSWER DOWNLOAD EXAMIANS APP