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This Concept Map, created with IHMC CmapTools, has information related to: Viral Structure cmap IID 8_2015 presentation, naked virus composition a genome surrounded by a capsid, genome function codes for: synthesis of viral components; viral enzymes for replication and host immune evasion, enveloped virus composition envelope surrounds nucleocapsid (icosahedral, helical or complex), capsid function protects viral genome, usually composed of protein subunits called capsomeres symmetry helical, a protein shell surrounding the genome compostion usually composed of protein subunits called capsomeres, Viral Structure Virion an intact infectious viral particle, may have an envelope has an envelope enveloped virus, may have an envelope origin derived from host cell membranes by a process called budding, a genome surrounded by a capsid attachment proteins viral proteins(spikes)project out from the capsid and bind the virus to receptors on susceptible host cells, an intact infectious viral particle consists of capsid, may have an envelope lacks an envelope naked virus, genome can be single molecule or multiple molecules (segmented), an intact infectious viral particle consists of genome, genome can be single-stranded or double-stranded DNA or RNA, envelope surrounds nucleocapsid (icosahedral, helical or complex) attachment proteins peplomers (glycoproteins) encoded by viral genome and embedded in membrane bind the virus to receptors on susceptible host cells, capsid description a protein shell surrounding the genome, usually composed of protein subunits called capsomeres symmetry icosahedral, genome can be linear or circular molecule, capsid function deliver genome into the cell