-What 2 parts does every virus need? What is one optional
part?
-Would a virus that infects...
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Biology
-What 2 parts does every virus need? What is one optionalpart?
-Would a virus that infects plants have an envelope? Why orwhy not?
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1 All viruses contain the following two components 1 a nucleic acid genome and 2 a protein capsid that covers the genome Together this is called the nucleocapsid In addition many animal viruses contain a 3 lipid envelope The entire intact virus is called the virion The structure and composition of these components can vary widely A Viral Genomes While the genomes of all known cells are comprised of double stranded DNA the genomes of viruses can be comprised of single or doublestranded DNA or RNA They can vary greatly in size from approximately 510 kb
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