Virology Flashcards
What is the definition of a virus?
Obligate intracellular parasite
Can viruses replicate themselves?
No
Do viruses contain cells?
No
Can viruses make energy or nutrients?
No
Can viruses synthesise proteins or nucleic acids?
No
Do viruses contain RNA or DNA?
They either contain RNA or DNA
Which groups of viruses are DNA viruses and which are RNA viruses?
Groups I II and VII are DNA viruses
Groups III IV V VI are RNA viruses
Name the DNA virus families
Hepadna Herpes Adeno Pox Parvo Papova
Which DNA viruses have naked capsids?
Parvovirus
Adenovirus
Papovavirus
What are viroids?
No protein
What are prions?
No nucleic acid
What are the four stages to virus replication?
Entry
Replication
Assembly
Release
What must be present for a virus to infect a cell?
The appropriate cell surface receptor to attach to
How do viruses penetrate the cell?
Either “fusion from within’
Or “fusion from without”
What is “fusion from within”?
pH dependent
The virus is endocytosed
