uestion 5 (1 point) Why do the Influenza A Nucleoproteins not show very much ant

Question

uestion 5 (1 point) Why do the Influenza A Nucleoproteins not show very much antigenic drift? A) because the mRNAs made from the nucleoprotein genes are capped while the other mRNAs are not B) they are nuclear proteins and thus are not "presented" efficiently to the host immune system C) because the nucleoproteins do not undergo mRNA splicing will other influenza A mRNAs do D) they are mutated less frequently than the rest of the genome becasue they are transcribed and replicated less frequently E) they do show a lot of antigenic drift; in fact, they show more antigenic drift than the HA protein

Explanation / Answer

5.Correct answer is:

D) they are mutated less frequently than the rest of the genome because they are transcribed and replicated less frequently.

Reason:Mutations in the nucleoproteins occurs very less frequently in comparision to the surface glycoproteins of the influenza A virus and so nucleoproteins show less antigenic drift.

1.The correct answer is:

A) proteolytic cleavge of a single translation product.

Reason: In picornaviruses,the long polyproteins formed by translation are processed either by proteases of the virus or host proteases to generate many proteins.

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