BIO by M Tahir ( Lecturer Al Azhar ) virus chapter

nmdcat.online July 11, 2026

In the Baltimore classification, viruses possessing positive-sense single-stranded RNA are characterized by

A. RNA acting directly as messenger RNA after infection

✓

B. RNA requiring reverse transcription before translation

C. DNA synthesis before protein synthesis

D. Dependence on host DNA polymerase

📝 Explanation

Positive-sense ssRNA viruses can be translated immediately by host ribosomes upon entering the host cell.

📖 Additional Information

RNA acting directly as messenger RNA after infection
RNA requiring reverse transcription before translation
DNA synthesis before protein synthesis
Dependence on host DNA polymerase

Positive-sense ssRNA viruses can be translated immediately by host ribosomes upon entering the host cell.

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