A virus consists of a viral genome formed from a type of nucleic acid (DNA or RNA) protected by a protein shell: the capsid. The set formed by the capsid and the nucleic acid is called the nucleocapsid. In some viruses, the nucleocapsid is surrounded by an envelope, which makes it possible to distinguish naked viruses, without an envelope, from enveloped viruses.
Virus contains either a RNA or DNA genome surrounded by a protective protein coat called the capsid. The capsid together with the genome forms the nucleocapsid. Non enveloped viruses are distinguished from enveloped viruses by an envelope covering the nucleocapsid.
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See the whole course: CBSV Term – Page 17 – § 2
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