What is the approximate diameter of retrovirus?
Correct answer: B. 100 nm
- A. 150 nm
- B. 100 nm
- C. 200 nm
- D. 250 nm
Explanation
The diameter of retroviruses typically ranges from approximately 80 to 120 nanometers (nm). Retroviruses are a family of enveloped viruses characterized by their use of reverse transcriptase to convert their RNA genome into DNA upon entering host cells. The viral particles consist of an outer lipid envelope, viral glycoproteins, and an inner core containing the RNA genome and viral enzymes. The size of retroviruses can vary slightly depending on the specific type of retrovirus.
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About Viruses
Viruses are acellular infectious particles made of genetic material enclosed by a protein capsid, sometimes with a lipid envelope. Their replication depends on a host cell and may follow lytic or lysogenic cycles, so viral structure and reproduction differ fundamentally from those of cellular organisms such as bacteria.
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