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- https://bio.libretexts.org/Courses/Manchester_Community_College_(MCC)/Remix_of_Openstax%3AMicrobiology_by_Parker_Schneegurt_et_al/09%3A_Acellular_Pathogens/9.01%3A_VirusesViruses are generally ultramicroscopic, typically from 20 nm to 900 nm in length. Some large viruses have been found. Virions are acellular and consist of a nucleic acid, DNA or RNA, but not both, sur...Viruses are generally ultramicroscopic, typically from 20 nm to 900 nm in length. Some large viruses have been found. Virions are acellular and consist of a nucleic acid, DNA or RNA, but not both, surrounded by a protein capsid. There may also be a phospholipid membrane surrounding the capsid. Viruses are obligate intracellular parasites.
- https://bio.libretexts.org/Bookshelves/Botany/Botany_(Ha_Morrow_and_Algiers)/02%3A_Biodiversity_(Organismal_Groups)/2.02%3A_Prokaryotes_and_Viruses/2.2.02%3A_VirusesViruses are generally ultramicroscopic, typically from 20 nm to 900 nm in length, though some larger viruses have been found. Viruses are acellular and consist of a nucleic acid, DNA or RNA, but not b...Viruses are generally ultramicroscopic, typically from 20 nm to 900 nm in length, though some larger viruses have been found. Viruses are acellular and consist of a nucleic acid, DNA or RNA, but not both, surrounded by a protein capsid. There may also be a phospholipid membrane surrounding the capsid. Viruses are obligate intracellular parasites.
- https://bio.libretexts.org/Courses/New_England_College/Microbiology_with_NEC/06%3A_Acellular_Pathogens/6.01%3A_VirusesViruses are generally ultramicroscopic, typically from 20 nm to 900 nm in length. Some large viruses have been found. Virions are acellular and consist of a nucleic acid, DNA or RNA, but not both, sur...Viruses are generally ultramicroscopic, typically from 20 nm to 900 nm in length. Some large viruses have been found. Virions are acellular and consist of a nucleic acid, DNA or RNA, but not both, surrounded by a protein capsid. There may also be a phospholipid membrane surrounding the capsid. Viruses are obligate intracellular parasites.
- https://bio.libretexts.org/Courses/Portland_Community_College/Cascade_Microbiology/06%3A_Acellular_Pathogens/6.1%3A_VirusesViruses are generally ultramicroscopic, typically from 20 nm to 900 nm in length. Some large viruses have been found. Virions are acellular and consist of a nucleic acid, DNA or RNA, but not both, sur...Viruses are generally ultramicroscopic, typically from 20 nm to 900 nm in length. Some large viruses have been found. Virions are acellular and consist of a nucleic acid, DNA or RNA, but not both, surrounded by a protein capsid. There may also be a phospholipid membrane surrounding the capsid. Viruses are obligate intracellular parasites.
- https://bio.libretexts.org/Courses/Mansfield_University_of_Pennsylvania/BSC_3271%3A_Microbiology_for_Health_Sciences_Sp21_(Kagle)/03%3A_Viruses/3.01%3A_Viral_Replication/3.1.01%3A_VirusesViruses are generally ultramicroscopic, typically from 20 nm to 900 nm in length. Some large viruses have been found. Virions are acellular and consist of a nucleic acid, DNA or RNA, but not both, sur...Viruses are generally ultramicroscopic, typically from 20 nm to 900 nm in length. Some large viruses have been found. Virions are acellular and consist of a nucleic acid, DNA or RNA, but not both, surrounded by a protein capsid. There may also be a phospholipid membrane surrounding the capsid. Viruses are obligate intracellular parasites.
- https://bio.libretexts.org/Courses/North_Central_State_College/BIOL_1550%3A_Microbiology_(2025)/07%3A_Viruses/7.03%3A_Viruses/7.3.03%3A_Viral_StructureSince viruses are not cells, they are structurally much simpler than bacteria. An intact infectious viral particle - or virion - consists of a genome, a capsid, and maybe an envelope. Viruses possess ...Since viruses are not cells, they are structurally much simpler than bacteria. An intact infectious viral particle - or virion - consists of a genome, a capsid, and maybe an envelope. Viruses possess either DNA or RNA as their genome. The genome is typically surrounded by a protein shell called a capsid composed of protein subunits called capsomeres.
- https://bio.libretexts.org/Bookshelves/Microbiology/Microbiology_(Kaiser)/Unit_4%3A_Eukaryotic_Microorganisms_and_Viruses/10%3A_Viruses/10.03%3A_Viral_StructureSince viruses are not cells, they are structurally much simpler than bacteria. An intact infectious viral particle - or virion - consists of a genome, a capsid, and maybe an envelope. Viruses possess ...Since viruses are not cells, they are structurally much simpler than bacteria. An intact infectious viral particle - or virion - consists of a genome, a capsid, and maybe an envelope. Viruses possess either DNA or RNA as their genome. The genome is typically surrounded by a protein shell called a capsid composed of protein subunits called capsomeres.
- https://bio.libretexts.org/Courses/Sacramento_City_College/BIOL_440%3A_General_Microbiology_(Hughes)/09%3A_Week_9/15%3A_Acellular_Pathogens_(Part_A)/15.01%3A_VirusesViruses are generally ultramicroscopic, typically from 20 nm to 900 nm in length. Some large viruses have been found. Virions are acellular and consist of a nucleic acid, DNA or RNA, but not both, sur...Viruses are generally ultramicroscopic, typically from 20 nm to 900 nm in length. Some large viruses have been found. Virions are acellular and consist of a nucleic acid, DNA or RNA, but not both, surrounded by a protein capsid. There may also be a phospholipid membrane surrounding the capsid. Viruses are obligate intracellular parasites.
- https://bio.libretexts.org/Courses/City_College_of_San_Francisco/Introduction_to_Microbiology/06%3A_Acellular_Pathogens/6.00%3A_VirusesViruses are generally ultramicroscopic, typically from 20 nm to 900 nm in length. Some large viruses have been found. Virions are acellular and consist of a nucleic acid, DNA or RNA, but not both, sur...Viruses are generally ultramicroscopic, typically from 20 nm to 900 nm in length. Some large viruses have been found. Virions are acellular and consist of a nucleic acid, DNA or RNA, but not both, surrounded by a protein capsid. There may also be a phospholipid membrane surrounding the capsid. Viruses are obligate intracellular parasites.
- https://bio.libretexts.org/Courses/North_Central_State_College/BIOL_1550%3A_Microbiology_(2025)/07%3A_Viruses/7.01%3A_VirusesViruses are generally ultramicroscopic, typically from 20 nm to 900 nm in length. Some large viruses have been found. Virions are acellular and consist of a nucleic acid, DNA or RNA, but not both, sur...Viruses are generally ultramicroscopic, typically from 20 nm to 900 nm in length. Some large viruses have been found. Virions are acellular and consist of a nucleic acid, DNA or RNA, but not both, surrounded by a protein capsid. There may also be a phospholipid membrane surrounding the capsid. Viruses are obligate intracellular parasites.
- https://bio.libretexts.org/Bookshelves/Microbiology/Microbiology_(OpenStax)/06%3A_Acellular_Pathogens/6.01%3A_VirusesViruses are generally ultramicroscopic, typically from 20 nm to 900 nm in length. Some large viruses have been found. Virions are acellular and consist of a nucleic acid, DNA or RNA, but not both, sur...Viruses are generally ultramicroscopic, typically from 20 nm to 900 nm in length. Some large viruses have been found. Virions are acellular and consist of a nucleic acid, DNA or RNA, but not both, surrounded by a protein capsid. There may also be a phospholipid membrane surrounding the capsid. Viruses are obligate intracellular parasites.
