Virology Exam 1 (Columbia - Racaniello)
Questions and Answers 100% Solved
1. How many viruses do we carry at any given time? Why don't these make
us sick? - - most viruses just pass through us
- non-human viruses
- Viruses can be beneficial (thermotolerant fungi)
- Strong immune system!
How ...
went through the filter caused disease. Must have been something very
small. Originally thought it was a poisonous liquid.
Virus Classification - ✔✔1. Nature and sequence of nucleic acid in virion
2. Symmetry of protein shell (capsid)
3. Presence or absence of lipid membrane (envelope)
4. Dimensions of virion and capsid
Virus growth curve - ✔✔
Virus titer aka Viral load - ✔✔numerical expression of the quantity of virus
in a given volume
higher viral burden, titre, or viral load often correlates with the severity of an
active viral infection
Why do we care about viruses? - ✔✔1. Greatest biodiversity on Earthy -->
enormous genetic diversity and variation, can transfer to host cells via
horizontal gene transfer
2. Drive Global Cycles - carbon, etc.
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