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Chapter19 (Life of a virus (Virus is an infectious particle (They can'…
Chapter19
Life of a virus
Virus is an infectious particle
They can't reproduce outside the host cell
They live in shady areas
Found through the plant mosaic disease
Infected areas on leaves appeared to be bacterium
It continued to be passed due to the sap
Capsid is a protein shell enclosing the viral genome
They can be rod shaped, polyhedral, or more complex in shape
built from capsomers
Viral envelopes has host cell phospholipids and membrane proteins
They come from the host membrane
Also contain glycroprotiens
Viruses that infect bacteriophages or just phages
Most complex capsid
They look somewhat like a spider
Vaccine/ Emerging virus
Vaccine is introducing the infection in order to build a tolerance
Helps to protect the immune system in danger
although they are meant to protect this can infact make someone sick
Epidemic is a wild spreed outbreak of illness
Pandemic is a illness spread rapidly in a global epidemic
Host cells lives
Host range is the number of cells that a virus can infect
they lack metabolic enzymes so they need the host
They need proteins to reprogram and make sick
Lytic Cycle
this is replicative cycle that culminates in death of host cell
last phase of infection
Where the bacteria breaks open in the cell and infects healthy cell
Lysogenic Cycle
allows for replication of cells without killing host
Both lysogenic and lytic can happen is called temperate phages
also can be called lambda