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CapsidThe protein coat that surround the genetic material of a virus. 
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EnvelopeA membranous covering found on some virus capsids that allows the virus to enter a host cell by fusing with the host's cell membrane. 
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EnzymesProteins that act as catalysts for chemical reactions. 
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GenesA unit of genetic material containing the information needed to produce and regulate a single protein. 
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LysogenicThe phase found in some viruses in which the virus's genetic material becomes incorporated into the host cell and no new viruses are produced. Compare with lytic. 
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LyticIn viruses with a lysogenic phase, the opposing phase in which virus replication takes place. 
 
         
   
                     
                     
                    