Question 1
Question
Which of the following does a virus lack? Select all that apply.
Answer
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ribosomes
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metabolic processes
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nucleic acid
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glycoprotein
Question 2
Question
The envelope of a virus is derived from the host’s
Answer
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nucleic acids
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membrane structures
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cytoplasm
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genome
Question 3
Question
What is another name for a nonenveloped virus?
Answer
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enveloped virus
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provirus
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naked virus
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latent virus
Question 4
Question
Scientists have identified viruses that are able to infect fungal cells.
Question 5
Question
Which of the following leads to the destruction of the host cells?
Answer
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lysogenic cycle
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lytic cycle
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prophage
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temperate phage
Question 6
Question
A virus obtains its envelope during which of the following phases?
Answer
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attachment
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penetration
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assembly
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release
Question 7
Question
Which of the following components is brought into a cell by HIV?
Question 8
Question
A positive-strand RNA virus:
Answer
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must first be converted to a mRNA before it can be translated.
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can be used directly to translate viral proteins.
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will be degraded by host enzymes.
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is not recognized by host ribosomes.
Question 9
Question
What is the name for the transfer of genetic information from one bacterium to another bacterium by a phage?
Answer
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transduction
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penetration
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excision
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translation
Question 10
Question
or lytic viruses, [blank_start]eclipse[blank_end] is a phase during a viral growth curve when the virus is not detected.
Question 11
Question
Which of these infectious agents do not have nucleic acid?
Answer
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virions
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viruses
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bacteria
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prions
Question 12
Question
Which of the following is true of prions?
Answer
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They can be inactivated by boiling at 100 °C
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They contain a capsid.
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They are a rogue form of protein, PrP.
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They can be reliably inactivated by an autoclave.
Question 13
Question
Which of the following statements about virus structure is true?
Answer
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All viruses are encased in a viral membrane.
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The capsomere is made up of small protein subunits called capsids.
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DNA is the genetic material in all viruses.
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Glycoproteins help the virus attach to the host cell.
Question 14
Question
Which statement is true?
Answer
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A virion contains DNA and RNA.
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Viruses are acellular.
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Viruses replicate outside of the cell.
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Most viruses are easily visualized with a light microscope.
Question 15
Question
Which is true of DNA viruses?
Answer
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They use the host cell’s machinery to produce new copies of their genome.
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They all have envelopes.
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They are the only kind of viruses that can cause cancer.
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They are not important plant pathogens.
Question 16
Question
Which of the following is not associated with prions?
Answer
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replicating shapes
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mad cow disease
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DNA
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toxic proteins
Question 17
Question
Which statement is true of viroids?
Answer
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They are single-stranded RNA particles.
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They reproduce only outside of the cell.
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They produce proteins.
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They affect both plants and animals.
Question 18
Question
Which is NOT a Baltimore classification of viruses?
Answer
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positive-strand DNA
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negative-strand DNA
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positive-strand RNA
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negative-strand RNA
Question 19
Question
Group I uses its own or host DNA polymerases for replication.
Question 20
Question
Group I: [blank_start]Double stranded DNA[blank_end]
Group II: [blank_start]Single stranded DNA[blank_end]
Group III: [blank_start]Double stranded RNA[blank_end]
Group IV: [blank_start]Positive single stranded RNA[blank_end]
Group V: [blank_start]Negative single stranded RNA[blank_end]
Group VI: [blank_start]Retrovirus[blank_end]
Group VII: [blank_start]Double stranded DNA pararetrovirus[blank_end]
Answer
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Double stranded DNA
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Single stranded DNA
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Double stranded RNA
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Positive single stranded RNA
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Negative single stranded RNA
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Retrovirus
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Double stranded DNA pararetrovirus
Question 21
Question
Spiders carry the Bluetongue virus into barns and fields. The virus causes high morbidity and mortality in ruminants. The Bluetongue virus is an orbivirus, which is part of the Reovirus family.
What is the Baltimore classification for Bluetongue virus?
Answer
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Group I
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Group II
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Group III
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Group IV
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Group V
Question 22
Question
Spiders carry the Bluetongue virus into barns and fields. The virus causes high morbidity and mortality in ruminants. The Bluetongue virus is an orbivirus, which is part of the Reovirus family.
What type of genome does the Bluetongue virus have?
Answer
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Single-stranded DNA
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Double-stranded DNA
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Single-stranded RNA
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Double-stranded RNA
Question 23
Question
What’s the difference between a virion and a viroid?
Answer
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There’s no difference. The terms are synonymous
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A viroid is bigger than a virion
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A viroid only infects plants while a virion only infects animals
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A viroid only has a capsid and no genetic material
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A viroid only has RNA and no capsid