Another name for a complete virus is ___________.
a. Virion
b. Viroid
c. Prion
d. Capsid

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Understand the terminology related to viruses: a complete virus particle includes the genetic material (DNA or RNA) enclosed within a protein coat called the capsid, and sometimes an envelope.

Review the options given: 'virion', 'viroid', 'prion', and 'capsid'.

Recall that a 'virion' refers to a fully assembled, infectious virus particle that is complete and capable of infecting a host cell.

Know that a 'viroid' is a small infectious RNA molecule without a protein coat, and a 'prion' is an infectious protein without nucleic acid.

Recognize that 'capsid' is just the protein coat of a virus, not the complete virus particle itself.

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Virion

A virion is the complete, infectious form of a virus outside a host cell, consisting of the viral genome enclosed within a protective protein coat called the capsid. It is capable of infecting a host and initiating viral replication.

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Viroid

Viroids are small, circular RNA molecules that infect plants but lack a protein coat. Unlike viruses, viroids do not form virions and rely entirely on host machinery for replication, causing disease without encoding proteins.

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Viroids

Capsid

The capsid is the protein shell that encases and protects the viral genetic material. It is made of protein subunits called capsomeres and plays a key role in virus attachment and entry into host cells, but alone it is not a complete virus.

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