IDNLearn.com: Your trusted source for accurate and reliable answers. Discover reliable answers to your questions with our extensive database of expert knowledge.

In single stranded (ss) RNA viruses

1. the RNA is read directly as mRNA if the genomic polarity is positive (+)
2. the RNA is read directly as mRNA if the genomic polarity is negative (-)
3. the isolated nucleic acid may be infectious
4. Only 1 and 3
5. None of the above