What type of virus is the smallpox virus?
Correct answer: A. DNA-enveloped virus
- A. DNA-enveloped virus
- B. RNA-enveloped virus
- C. DNA non-enveloped virus
- D. RNA non-enveloped virus
Explanation
Viruses are classified by genome type and presence of an envelope. RNA-enveloped viruses (e.g., influenza, HIV) have RNA with a capsid and lipid coat, while RNA-non-enveloped viruses (e.g., polio, rotavirus) carry RNA only in a capsid. DNA-enveloped viruses (e.g., herpes, hepatitis B, and poxvirus) contain a large double-stranded DNA genome with both capsid and envelope, whereas DNA-non-enveloped viruses (e.g., adenovirus and papillomavirus) package DNA only in a protein shell. Notably, the poxvirus is a DNA-enveloped virus.
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About Biodiversity and Variety of Life
Biological classification uses taxonomic ranks, binomial nomenclature and shared characteristics to organize life into kingdoms. The major groups include prokaryotes, protists, fungi, plants and animals, with comparisons based on cell type, cell wall, nutrition, body organization, reproduction and evolutionary relationships; prokaryotes lack a membrane-bound nucleus.
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