RNA viruses. () strand RNA viruses. Te genomic RNA of retroviruses is copied into dsDNA by reverse transcriptase early during infection, a process described in Chapter 7. Such DNA is infectious when … [Read more...] about What Is RNA Viruses.
Biology Study Notes
The absence of bona fide viral fossils, i.e. ancient material from which viral nucleic acids can be recovered, might appear to make the origin of viral genomes an impenetrable mystery. However, the … [Read more...] about The Origin of Viral Genomes
Some small RNA and DNA genomes enter cells from virus particles as naked molecules of nucleic acid, whereas others are always associated with specialized nucleic acid-binding proteins. A fundamental … [Read more...] about What Do Viral Genomes Look Like?
A universal function of viral genomes is to specify proteins. However, these genomes do not encode the complete machinery needed to carry out protein synthesis. Consequently, one important principle … [Read more...] about Genome Principles and the Baltimore System
Phylogenetic dendrograms, or trees, provide information about the inferred evolutionary relationships between viruses. The example shown in the figure is a phylogenetic tree for 10 viral isolates from … [Read more...] about How to read a phylogenetic tree