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