Question

What are the three types of RNA viruses?

1) Positive-sense single-stranded RNA viruses
2) Negative-sense single-stranded RNA viruses
3) Double-stranded RNA viruses
4) Positive-sense double-stranded RNA viruses
5) Negative-sense double-stranded RNA viruses

Answer 1

The three types of RNA viruses are positive-sense single-stranded RNA viruses, negative-sense single-stranded RNA viruses, and double-stranded RNA viruses.

Step-by-step explanation:

The three types of RNA viruses are:

1. Positive-sense single-stranded RNA viruses
2. Negative-sense single-stranded RNA viruses
3. Double-stranded RNA viruses

Positive-sense single-stranded RNA viruses have a genome that can serve directly as mRNA, while negative-sense single-stranded RNA viruses need to be replicated into positive-sense RNA before translation can occur. Double-stranded RNA viruses have two complementary strands of RNA, and mRNA is produced by transcription from these strands.