In the classification of viruses, the primary criterion distinguishing DNA viruses from RNA viruses is

A. Type of host infected

B. Type of nucleic acid present in the virion

✓

C. Presence of an envelope

D. Shape of the capsid

📝 Explanation

Viruses contain either DNA or RNA as their genetic material, never both. This is the most fundamental basis of viral classification.

📖 Additional Information

Type of host infected
Type of nucleic acid present in the virion
Presence of an envelope
Shape of the capsid

Viruses contain either DNA or RNA as their genetic material, never both. This is the most fundamental basis of viral classification.

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