Virology

Question 1

how are viruses different from bacteria?

Answer 1

have small genomes with dna OR rna
have no nuclear membrane or external cell wall
have no intracellular systems

Question 2

what is viral classification based on?

Answer 2

size/shape
enveloped/naked
RNA/DNA
antigenic differences

Question 3

what is the capsomere?

Answer 3

protein subunits of the capsid

Question 4

what is the capsid?

Answer 4

capsomers assembled to surround genome

Question 5

what is the nucleocapsid?

Answer 5

capsid and genomic nucleic acids

Question 6

what is the virus envelope?

Answer 6

lipid bilayer taken from host cell membrane that makes virus labile and unable to survive on surfaces

Question 7

what is the viral life cycle?

Answer 7

attachment
penetration
uncoating
transcription
translation
genome replication
assembly
release

Question 8

what is the steps of the virus-host cell interacitons?

Answer 8

entry
primary replication
spread
cell/tissue tropism
secondary replication
cell injury or persistence
host immune response

Question 9

what are the potential consequences of virus-cell interactions?

Answer 9

proliferation and cell lysis
latent infections
persistent infections
oncogenesis

Question 10

what are prions?

Answer 10

infectious agents made of protein that convert other proteins to their form

Question 11

what do prions cause?

Answer 11

spongiform encephalitis