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VIRUS-Morphology and Classification - Coggle Diagram
VIRUS-Morphology and Classification
Viral Morphology
Morphology
outer
protein
coating=capsid
encoded
by viral genome =
capsomeres
four groups
Helical capsids
https://upload.wikimedia.org/wikipedia/commons/1/1e/Helical_capsid.jpg
Icosahedral viruses
https://www.pnas.org/cms/10.1073/pnas.0405844101/asset/b80a2fb5-fe65-4074-88ac-e3adc2541ef4/assets/graphic/zpq0390460610001.jpeg
Enveloped viruses (derived from the host cell)
https://i0.wp.com/cms.jackwestin.com/wp-content/uploads/2020/02/Enveloped-viruses.jpg?resize=1025%2C820&ssl=1
Head-and-tail viruses
https://upload.wikimedia.org/wikipedia/commons/3/39/Structure_of_a_Myoviridae_bacteriophage_2.jpg
glycoprotein
attach to their host cells (viral receptor)
penetration
replication
three relatively complex virions
https://openstax.org/apps/image-cdn/v1/f=webp/apps/archive/20230620.181811/resources/a6f168ba276a9fc0712102af995e37495569dd54
Types of Nucleic Acid
virus core contains
genome
DNA or RNA
DNA viruses
viral DNA directs the host cell’s replication proteins
new copies viral genome
transcribe and translate
viral proteins.
RNA viruses
encode their own enzymes to replicate RNA
RNA
copying errors:
RNA polymerase enzymes
>
DNA polymerases
RNA Virus more mutation
1 more item...
DNA
single- or double-stranded.
linear or circular.
several segments
variability and continuous evolution
Classification
past system
gennome structure
capsid structure
Baltimore
based on how the
mRNA
is produced during the replicative cycle of the virus.
https://tinyurl.com/pd2xyuu2