Virus Reteach Question Preview (ID: 52493)


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Virus are living
a) True
b) False
c)
d)

What do viruses and cells have in common
a) Cell membrane
b) Ribosomes
c) DNA or RNA
d) Cytoplasm

What type of virus is HIV?
a) Bacteriophage
b) Influenza virus
c) Tobacco Mossaic
d) Retrovirus

Which type of virus takes longer to see?
a) Lytic
b) Lysogenic
c)
d)

What is the last step in the lytic and lysogenic cycle?
a) Replicate
b) Assemble
c) Lysis
d) Inject

What is the first step in the lytic or lysogenic cycle?
a) Attach
b) Inject
c) Replicate
d) Lysis

What happens after the virus has attached to the host cell?
a) it begins making protein
b) it divides
c) it inserts the DNA
d) it switches to infectious mode

Viruses are often named by:
a) where they were first discovered
b) the scientist who discovered it
c) the animal that carries it
d) all of these

Why is it difficult to develop vaccines for retroviruses?
a) their small size evades the immune system
b) RNA mutates more frequently than DNA
c) the capsid of retroviruses is resistant
d) vaccines can only target blood-borne pathogens

Why do some viruses seem to go away and then return later, like a cold sore?
a) host has been infected with a different strain
b) the immune system forgot the virus
c) the virus had entered the lysogenic cycle
d) the virus mutated

Antiviral drugs that are used after infection often prevent:
a) cell division
b) immune system degradation
c) reinfection by other viruses
d) uptake of the virus

Vaccines can be used to prevent viral infection by:
a) creating an immune response in the host
b) destroying any viruses that enter the host
c) creating a blocking protein on the cell
d) preventing replication of the virus

Retroviruses are different from viruses in that:
a) they have RNA instead of DNA
b) they can become dormant
c) they are symmetrical
d) all of these

Which of the following is smallest?
a) eukaryote cell
b) bacteria
c) bacteriophage
d) cell membrane protein

How do viruses reproduce?
a) hey divide by mitosis
b) sexually, by external fertilization
c) replication outside the host
d) inserting DNA into the host cell

A virus consist of:
a) RNA or DNA and a cell membrane
b) RNA or DNA and a protein coat
c) proteins, cell membrane and RNA
d)

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