Among the Largest RNA Genome Viruses are ________ Which Contain

Question

Among the largest RNA genome viruses are ________ which contain a ________ genome.
A) coronaviruses / dsRNA
B) coronaviruses / positive ssRNA
C) polioviruses / dsRNA
D) polioviruses / positive ssRNA

Accepted Answer

Coronaviruses have one of the largest RNA genomes among viruses and contain a positive single-stranded RNA genome. Polioviruses, on the other hand, have a smaller genome and contain a positive single-stranded RNA genome. Therefore, the correct choice is B.