Viruses are also known as an obligate intracellular parasite , which means that they require a host cell for their multiplication. The viral particle consists of the nucleic acid which is surrounded by a protein coat or capsid that stores the genetic information for the viral gene. Viral genes are very specific to the cell they invade and the genetic variation is large among the viruses.

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Chapter 5, Problem 4Q

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Viruses are also known as an obligate intracellular parasite, which means that they require a host cell for their multiplication. The viral particle consists of the nucleic acid which is surrounded by a protein coat or capsid that stores the genetic information for the viral gene. Viral genes are very specific to the cell they invade and the genetic variation is large among the viruses.

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