Viriology Flashcards
what is the diameter of virus
20 - 300 nm
-ve ssRNA is converted to DNA by?
action of RNA dependent RNA polymerase to make +ve ssRNAthen subsequent action of RNA dependent DNA polymerase to make DNA
naked virus leave the cell by?
causing the cell to burst (lyse)
Reverse transcriptase is found in
HIV(RNA virus) and Hepatitis B(DNA virus)
Bullet shaped capsid is found in
rabies (rhabdovirus)
DNA virus have helical symmetry
T or F
helical symmetry is only found in RNA virus although RNA viruses can also be icosahedral
complex symmetry is found in
Pox virus(DNA virus)
All DNA virus are double stranded
T or F
F
parvoviruses are single stranded
All RNA virus are single stranded
T or F
F
Reo virus are double stranded
RNA dependent RNA polymerase is present in cytoplasm of human cells
T or F
F
It is present in the capsid of RNA virus
list 2 RNAvirus family that replicate in nucleus (instead of the normal cytoplasm seen in Rna viruses)
Retrovirus(e.g hiv) and orthomyxovirus(e.g influenza)
List 4 naked RNA virus families
Picorna
calici
reo
astro
(remember to add viridae to family)
list 6 icosahedral Rna families
Toga
Flavi
picorna
calici
reo
astro
list 7 +ve ssRNA virus family
Toga
Flavi
Picorna
Corona
Calici
Retrovirus
List 4 DNA segmented virus
Trick question:
only RNA viruses are segmented
List segmented virus family and their corresponding segments
“BOARding flight 382 in 10-12 mins”
Bunya - 3 segments
Orthomyxovirus - 8 segments
Arena - 2 segments
Reo - 10 - 12 segments
which DNA virus has its own DNA dependent RNA polymerase
pox virus
this is because it can’t enter the nucleus so it can’t use the transcription enzyme present only in the nucleus
Example of circular DNA viruses
Hepadna
papilloma
polyoma
arboviruses are transmitted by what organisms
Arthropods
