Which Viruses Have Single-Stranded RNA That Acts as a Template

Question

Which viruses have single-stranded RNA that acts as a template for DNA synthesis?
A) lytic phages
B) proviruses
C) viroids
D) bacteriophages
E) retroviruses

Accepted Answer

Retroviruses have single-stranded RNA that acts as a template for DNA synthesis. Reverse transcriptase, an enzyme carried by the virus, produces a complementary DNA strand that is then integrated into the host genome as a provirus.