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Virus Reteach
Test Description: Its my first test
Instructions: Answer all questions to get your test result.
1) A virus consist of:
A
RNA or DNA and a cell membrane
B
proteins, cell membrane and RNA
C
RNA or DNA and a protein coat
2) How do viruses reproduce?
A
hey divide by mitosis
B
inserting DNA into the host cell
C
replication outside the host
D
sexually, by external fertilization
3) Which of the following is smallest?
A
bacteriophage
B
bacteria
C
cell membrane protein
D
eukaryote cell
4) Retroviruses are different from viruses in that:
A
they are symmetrical
B
they have RNA instead of DNA
C
they can become dormant
D
all of these
5) Vaccines can be used to prevent viral infection by:
A
creating a blocking protein on the cell
B
creating an immune response in the host
C
preventing replication of the virus
D
destroying any viruses that enter the host
6) Antiviral drugs that are used after infection often prevent:
A
reinfection by other viruses
B
uptake of the virus
C
cell division
D
immune system degradation
7) 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 virus mutated
C
the virus had entered the lysogenic cycle
D
the immune system forgot the virus
8) Why is it difficult to develop vaccines for retroviruses?
A
vaccines can only target blood-borne pathogens
B
RNA mutates more frequently than DNA
C
their small size evades the immune system
D
the capsid of retroviruses is resistant
9) Viruses are often named by:
A
where they were first discovered
B
all of these
C
the scientist who discovered it
D
the animal that carries it
10) What happens after the virus has attached to the host cell?
A
it begins making protein
B
it switches to infectious mode
C
it divides
D
it inserts the DNA
11) What is the first step in the lytic or lysogenic cycle?
A
Replicate
B
Attach
C
Inject
D
Lysis
12) What is the last step in the lytic and lysogenic cycle?
A
Replicate
B
Inject
C
Lysis
D
Assemble
13) Which type of virus takes longer to see?
A
Lysogenic
B
Lytic
14) What type of virus is HIV?
A
Bacteriophage
B
Influenza virus
C
Retrovirus
D
Tobacco Mossaic
15) Virus are living
A
True
B
False
16) What do viruses and cells have in common
A
DNA or RNA
B
Cytoplasm
C
Ribosomes
D
Cell membrane
*select an answer for all questions
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