Fundamentals of Molecular Biology - V.I. Rezyapkin 2009

Genome Organization
RNA-Containing Viruses

Viral RNA genome types are represented by three groups: single-stranded (+)RNA, single-stranded (-)RNA, and double-stranded RNA.

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The nucleotide sequences of viral (+)RNA genomes correspond to mRNA, whereas the nucleotide sequences of viral (-)RNA genomes are complementary to mRNA. Double-stranded RNA genomes are segmented, meaning they consist of multiple molecules. The other two groups may contain either segmented or non-segmented RNA molecules.

The genomes of Introduction/7.html">RNA-containing Viruses are linear molecules, whereas Viroids and virusoids are single-stranded circular RNAs (250-270 nt) capable of infecting plants.



Last update: 12/08/2026

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