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MDCAT
Biology
2023

Biology · Biodiversity | Variety of Life

Work through this past-paper style MCQ, then read the full explanation. Practice more biology questions on mMCQ with adaptive practice and topic analytics.

Question

Which of the following viruses contains single-stranded DNA?

Options
  • A

    Adenovirus

  • B

    Herpes virus

  • C

    Parvovirus

  • D

    Pox virus

Explanation

Parvoviruses are a group of viruses that carry a single-stranded DNA genome. They are among the smallest DNA viruses and typically infect animals, including humans.

Adenoviruses contain double-stranded DNA rather than single-stranded DNA. This double-stranded DNA is housed inside an icosahedral capsid made of multiple capsomeres.

Herpesviruses also contain double-stranded DNA. Their genome is enclosed within a large icosahedral capsid, surrounded by a tegument layer and an outer envelope.

Parvoviruses are a group of viruses that carry a single-stranded DNA genome. They are among the smallest DNA viruses and typically infect animals, including humans.

Poxviruses also contain double-stranded DNA. Their genome is quite large, and these viruses replicate entirely in the cytoplasm, which is unusual for DNA viruses.

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Tagged under Biology · Biodiversity | Variety of Life · 2023