Assertion : Interferons are effective against viruses.
Reason : Proteins which can be synthesized only by genetic engineering are effective against viruses.
If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
If the Assertion is correct but Reason is incorrect.
If both the Assertion and Reason are incorrect.
What is the role of spleen in Human body?
Physical barrier = .............. and physiological barrier = .............
Differentiate the following and give examples of each:
$(a)$ Innate and acquired immunity
$(b)$ Active and passive immunity
In higher vertebrates, the immune system can distinguish selfcells and non-self. If this property is lost due to genetic abnormality and it attacks selfcells, then it leads to
An 'antigen' is