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Viruses consist of a small collection of genetic material (DNA or RNA) encased in a protective protein coat called a capsid. (Retroviruses are among the infectious particles that use RNA as their hereditary material.
1 Capsid: a protective shell around the genome of a virus. 2  Cell membrane: the outside layer of a cell that separates it from its environment. 3  Envelope: part of a cell membrane that is stolen to become the outer layer of some viruses. 4  Genome: all of the genetic information of an organism (living thing)...ou might not think that simple viruses could take over your complex cells, but they do all the time. This is very important to viruses since they donât have the machinery to make copies of themselves. Instead, they trick your cells into becoming virus-making machines for them.