Question

A class iv virus would select an answer and submit. for keyboard navigation, use the up/down arrow keys to select an answer.

a. use the host cell dna dependent dna polymerase to replicate it's genome
b. use the host cell dna dependent rna polymerase to replicate it's genome
c. use it's own dna dependent dna polymerase to replicate it's genome
d. use it's own dna dependent rna polymerase to replicate it's genome
e. use it's own rna dependent rna polymerase to replicate it's genome

Answer 1

Class IV viruses use their own RNA-dependent RNA polymerase to replicate their genome within the host cell, as this enzyme is not found in typical host cells and is necessary for RNA to RNA replication.

Step-by-step explanation:

The replication mechanism of a virus depends on its genome type. Class IV viruses belong to the Baltimore classification and are characterized as positive-sense single-stranded RNA viruses (ssRNA).

These viruses require RNA-dependent RNA polymerase to replicate their genomes because this enzyme uses RNA as a template to synthesize new RNA strands. Since host cells typically do not have this enzyme, class IV viruses must encode their own RNA-dependent RNA polymerase. Hence, when a class IV virus infects a host cell, it uses its own RNA-dependent RNA polymerase to replicate its genome.