Microbiology Ch. 8 – Flashcards
Unlock all answers in this set
Unlock answersquestion
What are the minimal components needed for a virion?
answer
capsid and genome
question
Which of the following examples is an example of lysogenic conversion?
answer
Vibrio cholerae bacteria produce cholera toxin when infected with a phage.
question
We sometimes are able to generate antibodies (immune system proteins) that bind to and cover up some of the proteins on the outermost portion of a virus while it is in the bloodstream. This renders the virus unable to reproduce. Which step of viral replication are antibodies directly preventing?
answer
attachment
question
Enveloped viruses have a layer of lipids surrounding their capsid. This envelope is made mostly of host cell membrane. In which step does the virus acquire this envelope?
answer
release
question
What occurs during viral uncoating?
answer
The capsid breaks apart, releasing the viral genome.
question
A retrovirus has a genome that consists of __________.
answer
ssRNA
question
Which of the following are viable methods of release of newly assembled viral particles?
answer
budding or lysis of host cell
question
When describing the viral genome, which terms could be used?
answer
ds RNA
ss DNA
ds DNA
***All of the listed responses are correct.
question
How is penetration different in animal viruses as compared to bacterial viruses?
answer
The entire viral particle penetrates an animal cell, while only the viral genome penetrates a bacterial cell.
question
How are viruses different from cells?
answer
They require a host in order to reproduce.
question
What is the function of the structural elements of a virus?
answer
To package and protect the viral genome
question
In which stage is the viral DNA introduced into the cell?
answer
penetration
question
In which stage does formation of mature viruses occur?
answer
assembly
question
An attachment structure made of carbohydrates that can also help hide the microbe from white blood cells.
answer
capsule
question
A small circle of genetic material known to carry antibiotic resistance genes.
answer
plasmid
question
Site of protein synthesis in the cell.
answer
ribosome
question
Can come in several arrangements such as lophotrichous or peritrichous.
answer
flagella
question
An attachment structure made of protein. They are very numerous and typically short.
answer
fimbriae
