Multiple choice

Human immunodeficiency virus (HIV), the cause of AIDS, belongs to the category of

  1. single-stranded DNA (ssDNA)

  2. reverse-transcribing viruses

  3. double-stranded RNA (dsRNA)

  4. negative sense single-stranded RNA (ssRNA-)

  5. positive sense single-stranded RNA (ssRNA+)
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

These have dsDNA or ssRNA genomes and their replication includes the synthesis of DNA from RNA by the enzyme reverse transcriptase; many integrate into their host genomes. The group includes the retroviruses, of which Human immunodeficiency virus (HIV), the cause of AIDS, is a member. There is a single family of plant viruses in this group and this is characterised by a single component of circular dsDNA, the replication of which is via an RNA intermediate.

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