+
Related Flashcards
Related Topics
Cards In This Set
| Front | Back |
|
Viruses
|
Obligate intracellular parasites; requires a host cell to grow and replicate
|
|
All viruses contain:
|
Aremuch smaller than bacterial cells
DNA or RNA; protein coat (capsid)
Some are enclosed by an envelope (phospholipid bilayer)
Some have spikes (glycoproteins that bind to host)
|
|
Specificity
|
Viruses that infect only a specific type of cell in one host
|
|
Host range
|
Spectrum of host viruses can infect determined by the host attachment site
|
|
Viral Species
|
A group of viruses sharing the same genetic information and ecological niche (host)
|
|
Viruses must be grown
|
In living cells
|
|
Bacteriophages
|
(viruses that infect bacteria) form clearings (plaques) on a lawn of bacteria
|
|
Animal viruses
|
May be grown in living animals or in embryonated eggs
|
|
Cell culture
|
Animal and plant viruses are grown in this
|
|
Primary cell line
|
From human adult tissue; but die out quickly
|
|
Diploid cell lines
|
From embryonic tissue; lasts about 100 generations
|
|
Continuous cell lines
|
Immortal; from cancer tissue
|
|
Cytopathic effects
|
Physical changes to viral infected cells (rounded unattached)
|
|
PCR
|
Polymerase chain reaction - amplifies specific genes
|
|
Multiplication of bacteriophages
|
Attachment, penetration, biosynthesis, maturation, release, lytic cycle
|
