Families of Viruses
Although many characteristics distinguish viruses, most are organized by whether they have a genome of DNA or of RNA and whether they have an envelope. In addition, the nature of the nucleic acid (linear vs. circular, small vs. large, single-stranded vs. double-stranded) and the mode of incorporation (nucleic acid remains separate vs. nucleic acid joins with host chromosome) distinguishes the different virus types.
Table 14.1 shows some of
the known viral diseases and the families of viruses that cause them.
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