Virus Pre-Test Question Preview (ID: 57763)
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A virus consists of...
a) DNA or RNA and a protein coat
b) DNA or RNA and a cell membrane
c) DNA and RNA and a protein coat
d) proteins, cell membrane, and RNA
How do viruses reproduce?
a) Through replication inside of a host cell
b) By dividing through mitosis
c) Through replication outside of a host cell
d) By external fertilization
Which of the following is the smallest?
a) Bacteriophage
b) Eukaryote cell
c) Bacteria
d) Cell membrane protein
Retroviruses are a specific type of virus that...
a) have RNA and are able to perform reverse transcription.
b) can become dormant.
c) only infect bacteria and archaea.
d) they are symmetrical.
Vaccines can be used to prevent viral infection by...
a) creating an immune response in the host.
b) destroying any viruses that enter into the host.
c) creating a blocking protein on the cell.
d) preventing replication of the virus.
Antiviral drugs that are used after infection often prevent
a) uptake of the virus
b) cell division
c) immune system degradation
d) reinfection by other viruses
Why do some viruses seem to go away and then return later, like a cold sore?
a) Because the virus has entered the lysogenic cycle.
b) Because the virus has mutated.
c) Because the immune system has forgotten how to fight the virus.
d) Because the host has been infected by a different strain of the virus.
Why is it difficult to develop vaccines for retroviruses?
a) Because RNA mutates more frequently than DNA.
b) Because their small size allows them to evade immune systems.
c) Because the capsid of retroviruses is resistant.
d) Because vaccines can only target blood-borne pathogens.
Viruses are often named by...
a) where they were first discovered.
b) the scientist who discovered it.
c) the animal that carries it.
d) where they were first discovered, who discovered it, and/or the animal that carries it.
What happens after the virus has been taken up by the cell
a) The viral capsid comes apart, releasing the virus's genetic material into the cell.
b) The virus begins to divide.
c) The virus starts creating proteins.
d) It switches into infectious mode.
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