What is interferon
A type of plasmid
A type of protein
A type of gene
A type of hormone
(b) Interferon is a protein which is released by host cells when a virus enters the cell.
Write in details about Thymus.
Active immunity is obtained by
Given below are two statements :
Statement $I$ : Bone marrow is the main lymphoid organ where all blood cells including lymphocytes are produced.
Statement $II$ : Both bone marrow and thymus provide micro environments for the development and maturation of T-lymphocytes.
In the light of above statements, choose the most appropriate answer from the options given below :
Explain Acquired immunity.
The antibodies are
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