Why Do RNA Viruses Tend to Have Unusually High Rates

Multiple Choice

Why do RNA viruses tend to have unusually high rates of mutation?

A) RNA nucleotides are more unstable than DNA nucleotides.
B) Replication of their genomes does not involve correcting errors in genome replication.
C) RNA viruses replicate faster.
D) RNA viruses can incorporate a variety of nonstandard bases.