Bacteriophages And Animal Viruses Do Not Differ Significantly In Which One Of The Following Steps?
one
1) How practice all viruses differ from leaner?
A) Viruses are filterable.
B) Viruses are obligate intracellular parasites.
C) Viruses do not take any nucleic acid.
D) Viruses are not equanimous of cells.
East) Viruses do not reproduce.
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2) Which of the following statements provides the most significant back up for the idea that viruses are nonliving chemicals?
A) They are not equanimous of cells.
B) They are filterable.
C) They cannot reproduce themselves exterior a host.
D) They crusade diseases like to those caused by chemicals.
E) They are chemically unproblematic.
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3) Which of the following statements about viral spikes is FALSE?
A) They are composed of sugar-protein complexes.
B) They are used for attachment.
C) They may cause hemagglutination.
D) They bind to receptors on the host cell surface.
East) They are found but on nonenveloped viruses.
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four) Which of the following is NOT used as a criterion to classify viruses?
A) biochemical tests
B) morphology
C) nucleic acid
D) size
E) number of capsomeres
five
5) Which of the post-obit is NOT utilized to civilisation viruses?
A) laboratory animals
B) civilization media
C) embryonated eggs
D) fauna cell cultures
E) bacterial cultures
6
six) Bacteriophages and animal viruses do NOT differ significantly in which one of the post-obit steps?
A) attachment
B) penetration
C) uncoating
D) biosynthesis
Eastward) release
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7) The definition of lysogeny is
A) phage Dna is incorporated into host cell Deoxyribonucleic acid.
B) lysis of the host cell due to a phage.
C) the period during replication when virions are not present.
D) when the burst time takes an unusually long time.
East) zipper of a phage to a cell.
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8) A viroid is a(northward)
A) complete, infectious virus particle.
B) infectious piece of RNA without a capsid.
C) capsid without nucleic acid.
D) provirus.
East) infectious protein.
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9) In Figure 13.i, which construction is a complex virus?
- A) a
- B) b
- C) c
- D) d
- Eastward) All of the structures are complex viruses.
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10) The structures illustrated in Figure xiii.one are composed of
A) DNA.
B) RNA.
C) Deoxyribonucleic acid or RNA.
D) Capsomeres.
E) viroids.
eleven
eleven) A articulate area confronting a confluent "lawn" of bacteria is chosen a
A) phage.
B) pock.
C) cell lysis.
D) plaque.
Eastward) rash.
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12) Continuous cell lines differ from main cell lines in that
A) viruses can be grown in continuous jail cell lines.
B) continuous jail cell lines e'er have to be re-isolated from creature tissues.
C) continuous cell lines are derived from primary cell lines.
D) continuous cell lines tin can be maintained through an indefinite number of generations.
E) continuous cell lines are from human being embryos.
thirteen
xiii) Which of the following is necessary for replication of a prion?
A) DNA
B) Dna polymerase
C) lysozyme
D) PrPSc
E) RNA
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14) A persistent infection is one in which
A) the virus remains in equilibrium with the host without causing a disease.
B) viral replication is unusually slow.
C) the disease process occurs gradually over a long menstruum.
D) host cells are gradually lysed.
E) host cells are transformed.
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xv) Which of the following statements is Fake?
A) A prophage is phage DNA inserted into a bacterial chromosome.
B) A prophage can "popular" out of the chromosome.
C) Prophage genes are repressed by a repressor protein coded for past the prophage.
D) A prophage may effect in new properties of the host cell.
E) The prophage makes the host jail cell immune to infection by other phages.
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16) Lysogeny tin upshot in all of the following EXCEPT
A) immunity to reinfection by the same phage.
B) acquisition of new characteristics by the host cell.
C) immunity to reinfection by any phage.
D) specialized transduction.
E) phage conversion.
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17) Which of the following would be the get-go footstep in biosynthesis of a virus with a - (minus) strand of RNA?
A) synthesis of Deoxyribonucleic acid from an RNA template
B) synthesis of double-stranded RNA from an RNA template
C) synthesis of double-stranded RNA from a Dna template
D) transcription of mRNA from DNA
E) synthesis of Dna from a DNA template
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18) An infectious protein is a
A) bacteriophage.
B) prion.
C) retrovirus.
D) viroid.
E) papovavirus.
xix
xix) An envelope is acquired during which of the post-obit steps?
A) penetration
B) adsorption
C) uncoating
D) biosynthesis
E) release
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xx) Which of the following statements is Not true of lysogeny?
A) It tin give infected pathogens the genetic data for toxin production.
B) Prophage is inserted into the host genome.
C) Lytic cycle may follow lysogeny.
D) It is a "silent" infection; the virus does non replicate.
E) Information technology causes lysis of host cells.
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21) An case of a latent viral infection is
A) subacute sclerosing panencephalitis.
B) cold sores.
C) influenza.
D) smallpox.
E) mumps.
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22) A virus'due south ability to infect an animal prison cell depends primarily upon the
- A) host cell's ability to phagocytize viral particles.
- B) presence of receptor sites on the cell membrane.
- C) type of viral nucleic acrid.
- D) enzymatic action of a host cell.
- E) presence of pili on the host cell wall.
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23) Assume y'all accept isolated an unknown virus. This virus has a single, positive sense strand of RNA, and possesses an envelope. To which group does it most likely belong?
A) herpesvirus
B) picornavirus
C) retrovirus
D) togavirus
Due east) papovavirus
24
24) The mechanism whereby an enveloped virus leaves a host cell is chosen
A) transduction.
B) budding.
C) abduction.
D) lysogeny.
E) penetration.
25
25) The most conclusive evidence that viruses cause cancers is provided by
A) finding oncogenes in viruses.
B) the presence of antibodies confronting viruses in cancer patients.
C) cancer following injection of cell-free filtrates.
D) treating cancer with antibodies.
E) some liver cancer patients having had hepatitis.
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26) Bacteriophages derive all of the following from the host cell EXCEPT
A) lysozyme.
B) tRNA.
C) amino acids.
D) nucleotides.
E) ATP.
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27) Bacteriophage replication differs from fauna virus replication because only bacteriophage replication involves
A) adsorption to specific receptors.
B) assembly of viral components.
C) replication of viral nucleic acrid.
D) injection of naked nucleic acid into the host cell.
E) lysis of the host jail cell.
28
28) Generally, in an infection caused by a Dna-containing virus, the host brute prison cell supplies all of the following EXCEPT
A) RNA polymerase.
B) nucleotides.
C) Dna polymerase.
D) tRNA.
E) None of the answers are correct; all of these are supplied by the host brute cell.
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29) Which of the following places these items in the correct order for Deoxyribonucleic acid-virus replication?
- Maturation
- DNA synthesis
- Transcription
- Translation
- A) 1; 2; iii; iv
- B) 2; 3; 4; one
- C) iii; 4; 1; ii
- D) 4; one; 2; iii
- E) iv; 3; two; 1
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30) A viral species is a group of viruses that
A) has the aforementioned morphology and nucleic acrid.
B) has the same genetic information and ecological niche.
C) infects the aforementioned cells and cause the aforementioned disease.
D) cannot exist defined.
31
31) Viruses that use opposite transcriptase belong to the virus families
A) Retroviridae and Picornaviridae.
B) Herpesviridae and Retroviridae.
C) Hepadnaviridae and Retroviridae.
D) Herpesviridae and Poxviridae.
E) Rhabdoviridae and Herpesviridae.
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32) DNA made from an RNA template volition be incorporated into the virus capsid of
A) Retroviridae.
B) Herpesviridae.
C) Hepadnaviridae.
D) bacteriophage families.
E) influenzavirus.
33
33) Which of the following statements most viruses is FALSE?
A) Viruses contain DNA or RNA just never both.
B) Viruses contain a protein glaze.
C) Viruses use the anabolic machinery of the prison cell.
D) Viruses utilize their own catabolic enzymes.
East) Viruses accept genes.
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34) A lytic virus has infected a patient. Which of the post-obit would best describe what is happening inside the patient?
A) The virus is causing the death of the infected cells in the patient.
B) The virus is not killing any cells in the host.
C) The virus is incorporating its nucleic acid with that of the patient'south cells.
D) The virus is slowly killing the patient'southward cells.
E) The virus is infecting cells and then releasing but small amounts of virus.
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35) Some viruses, such every bit human herpesvirus one, infect a jail cell without causing symptoms. These are called
A) latent viruses.
B) lytic viruses.
C) phages.
D) slow viruses.
Due east) unconventional viruses.
36
36) Presume a patient had chickenpox (human being herpesvirus 3) as a child. Which line on the graph in Figure 13.2 would evidence the number of viruses present in this person as a 60-year-quondam with shingles (man herpesvirus 3)?
A) a
B) b
C) c
D) d
Eastward) e
37
37) Presume a patient has influenza. During which time on the graph in Figure 13.2 would the patient show the symptoms of the illness?
A) a
B) b
C) c
D) d
E) east
38
38) The following steps occur during multiplication of herpesviruses. Which is the third step?
A) zipper
B) biosynthesis
C) penetration
D) release
E) uncoating
39
39) The following steps occur during multiplication of retroviruses. Which is the fourth step?
A) synthesis of double-stranded DNA
B) synthesis of +RNA
C) attachment
D) penetration
E) uncoating
xl
twoscore) Oncogenic viruses
A) cause acute infections.
B) are genetically unstable.
C) crusade tumors to develop.
D) are lytic viruses that impale the host prison cell.
E) have no effect on the host cell.
41
41) Which one of the following steps does Non occur during multiplication of a picornavirus?
A) synthesis of + strands of RNA
B) synthesis of - strands of RNA
C) synthesis of viral proteins
D) synthesis of Deoxyribonucleic acid
E) None of the answers is correct.
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42) Which of the following is most probable a product of an early cistron?
A) capsid proteins
B) DNA polymerase
C) envelope proteins
D) spike proteins
E) lysozyme
43
43) Near RNA viruses carry which of the following enzymes?
A) DNA-dependent Deoxyribonucleic acid polymerase
B) lysozyme
C) RNA-dependent RNA polymerase
D) opposite transcriptase
E) ATP synthase
44
44) The post-obit steps occur during biosynthesis of a + strand RNA virus. What is the 3rd step?
A) attachment
B) penetration and uncoating
C) synthesis of - strand RNA
D) synthesis of + strand RNA
E) synthesis of viral proteins
45
45) What contributes to antigenic shift in influenza viruses?
A) worldwide distribution of the virus
B) a segmented genome
C) attachment spikes
D) ease of virus transmission
E) different virus subtypes
46
46) ________ were first identified in cancer-causing viruses and tin induce ________ in infected cells.
A) Herpes viruses; lesions
B) Oncogenes; transformation
C) T antigens; lysis
D) Glycoprotein spikes; syncytia germination
E) Segmented genomes; reassortment
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1) The basic mechanism of viral multiplication is similar for all viruses.
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2) A viroid is a completely developed infectious agent composed of nucleic acid and surrounded by a capsid.
49
three) Binomial nomenclature is used to proper name viruses.
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iv) Glycoprotein spikes are found on the capsids of all viruses.
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5) Positive sense RNA strands of viruses are treated like mRNA inside the host cell.
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6) Dogs do not get measles because their cells lack the correct receptor sites for that virus.
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7) Helical and icosahedral are terms used to describe the shapes of a virus envelope.
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viii) Viruses are the only known infectious agents that are obligatory intracellular parasites.
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9) A segmented genome can effect in antigenic shift.
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10) Most drugs that interfere with viral multiplication as well interfere with host cell office.
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