Question

A virus should NOT contain genes that encode for/specify the following:?

Group of answer choices

a)viral enzymes used in biosynthesis step

b)spikes, matrix proteins, enveleope proteins

c)attachment molecules

d)ribosomal proteins, rRNAs, capsule proteins and plasma membrane proteins

e)capsomeres

f)protiens that shut off expression of host cell's genes

Answer 1

Ans d is correct

A. During the viral replication, the virus should synthesize the capsid, its genetic material which further assembles to form daughter virions. So, a virus needs genes that code for enzymes in biosynthesis.

B. Spikes, matrix proteins, enveleope proteins are all part of the virus and are necessary for its survival and replication

C. For the Virus to enter the host cell and replicate , first it needs to attach to the host cell membrane, so, it should have attachment molecules.

D.a virus uses the host cell machinery for its replication process, it does not have ribosomes, rRNAs, capsule proteins and plasma membrane proteins which are which are needed for its replication as, it is dependent on Host cells for its replication.

E.Capsomere is a subunit of the capsid, an outer covering of protein that protects the genetic material of a virus, allow the virus to attach to a host cell, and also to inject its genetic material into the host.

F. Virus needs protiens that shut off expression of host cell's genes, as this will promote viral replication by freeing host cell machinery and blocks the immune responses.