A) histone
B) antigen
C) antibody
D) interferon
Correct Answer: D
Solution :
Interferons are low-molecular weight- proteins that prevent viral multiplication by stimulating the production of antiviral proteins in normal cells. Interferon activity is host specific rather than virus specific. Antibody or immunoglobulins are protein molecules that are able to combine with antigenic determinant. They are found in the serum and other body fluids such as gastric secretion and milk. Antigen is a molecule capable of interacting with specific components of the immune system. The portion of the antigen that is reactive with a specific antibody or T-cell receptor is called, epitope. Histones are basic proteins, which binds with DNA molecule to form nucleosome.
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