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BIO by M Tahir ( Lecturer Al Azhar ) virus chapter
nmdcat.online July 11, 2026

In the classification of viruses based on nucleic acid, the characteristic feature of DNA viruses is

A. Presence of both DNA and RNA
B. Possession of DNA as the only genetic material
✓
C. Absence of nucleic acid
D. Presence of circular RNA only

📝 Explanation

DNA viruses contain DNA as their genetic material, whereas RNA viruses contain RNA. A virus never contains both DNA and RNA simultaneously.

📖 Additional Information

  • Presence of both DNA and RNA
  • Possession of DNA as the only genetic material
  • Absence of nucleic acid
  • Presence of circular RNA only

DNA viruses contain DNA as their genetic material, whereas RNA viruses contain RNA. A virus never contains both DNA and RNA simultaneously.

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