Final answer:
Retroviruses are RNA viruses that use reverse transcriptase to convert their RNA genome into DNA. HIV is an example of a retrovirus.
Step-by-step explanation:
Retroviruses are a type of RNA virus that have a diploid RNA genome.
They use a specialized viral enzyme called reverse transcriptase to convert their RNA genome into double-stranded DNA.
This viral DNA is then transported into the host cell nucleus and integrated into the host genome, allowing the virus to produce mRNA by transcribing the viral DNA.
Retroviruses, such as the human immunodeficiency virus (HIV), are examples of group VI viruses in the Baltimore classification.