Lec1 Flashcards
was able to show that the causal agent of a mosaic disease of tobacco plants, could not be seen or cultivated.
Who?
Dmitri Iwanowski
Bacteriophage (bacterial viruses) were discovered independently by ?
Frederick W. Twort and Félix d’Hérelle
submicroscopic, obligate intracellular parasites, which contain either RNA or DNA genome surrounded by a protective, virus-coded protein coat.
Viruses
are too small to be seen by optical microscopes, and they have no choice but to replicate inside host cells.
Viruses
Virus composed of?
Coat protein and nucleic acid
structural component that is found in all
viruses is?
Capsid
genomes of viruses can be comprised of ?
single or double stranded DNA or RNA .
occurs when respiratory droplets generated via coughing, sneezing (influenza, adenovirus)
Which type of transmission?
Droplet transmission
via food stuffs or water that has become contaminated.
Which type of transmission?
Fecal oral transmission
Biological vectors are usually, though not exclusively, arthropods, Ex. mosquitoes, ticks.
Which type of transmission?
Vector-borne transmission
Importance of proteins that surrounde the virus genomes?
- Protect nucleic acids from nuclease degradation and shearing.
- Contain identification elements that ensure a virus recognizes an appropriate target cell
Virus replication cycles phases
1- Attachment
2- Penetration
3- Uncoating
4- Biosynthesis
5- Assembly
6- Release
Satellite viruses encode the enzymes
T/F
F, only virus
Genome of viroid are DNA
T/F?
F, ssRNA
Only virus encode the structural protein for encapsidation
T/F?
F, also satellite viruses.
