Ch 13 Micro

Card Set Information

Author:
XQWCat
ID:
184588
Filename:
Ch 13 Micro
Updated:
2012-11-19 23:43:37
Tags:
Microbiology
Folders:

Description:
Chapter 13 Microbiology test 3
Show Answers:

Home > Flashcards > Print Preview

The flashcards below were created by user XQWCat on FreezingBlue Flashcards. What would you like to do?


  1. 1) In which of the following ways do viruses differ from bacteria?A) Viruses are filterable.B) Viruses are obligate intracellular parasites.C) Viruses don't have any nucleic acid.D) Viruses are not composed of cells.E) Viruses don't reproduce.
    D
  2. Which of the following statements provides the most significant support for the idea that viruses are nonliving chemicals?A) They are not composed of cells.B) They are filterable.C) They cannot reproduce themselves outside a host.D) They cause diseases similar to those caused by chemicals.E) They are chemically simple.
    C
  3. Which of the following statements about spikes is false?A) They are used for penetration.B) They are used for absorption.C) They may cause hemagglutination.D) They are found only on enveloped viruses.E) They are found only on nonenveloped viruses.
    A
  4. Which of the following is NOT used as a criterion to classify viruses?A) Biochemical testsB) MorphologyC) Nucleic acidD) SizeE) Number of capsomeres
    A
  5. Which of the following is NOT a method of culturing viruses?A) In laboratory animalsB) In culture mediaC) In embryonated eggsD) In cell cultureE) None of the above
    B
  6. Bacteriophages and animal viruses do NOT differ significantly in which one of the following steps?
    A) AdsorptionB) PenetrationC) UncoatingD) BiosynthesisE) Release
    D
  7.  The definition of lysogeny isA) Phage DNA is incorporated into host cell DNA.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.E) Attachment of a phage to a cell.
    A
  8. A viroid isA) A complete, infectious virus particle.B) A nonenveloped, infectious piece of RNA.C) A capsid without a nucleic acid.D) A provirus.E) An infectious protein.
    B
  9. A clear area against a confluent "lawn" of bacteria is called aA) Phage.B) Pock.C) Cell lysis.D) Plaque.E) Rash
    D
  10. Continuous cell lines differ from primary cell lines in thatA) Viruses can be grown in continuous cell lines.B) Continuous cell lines always have to be reisolated from animal tissues.C) Continuous cell lines are derived from primary cell lines.D) Continuous cell lines can be maintained through an indefinite number of generations.E) Continuous cell lines are from human embryos.
    D
  11. Which of the following is necessary for replication of a prion?A) DNAB) DNA polymeraseC) LysozymeD) PScE) RNA
    D
  12. A persistent infection is an infection in whichA) 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 period.D) Host cells are gradually lysed.E) Host cells are transformed.
    C
  13. Which of the following statements is false?A) A prophage is phage DNA inserted into a bacterial chromosome.B) A prophage can pop out of the chromosome.C) Prophage genes are represented by a repressor protein coded for by the prophage.D) A prophage may result in new properties of the host cell.E) The prophage makes the host cell immune to infection by other phages.
    E
  14. Lysogeny can result in all of the following EXCEPTA) Immunity to reinfection by the same phage. B) Acquisition of new characteristics by the host cell.C) Immunity to reinfection by any phage.D) Transduction of specific genes.E) None of the above
    C
  15. Which of the following would be the first step in biosynthesis of a virus with a - strand of RNA?A) Synthesis of DNA from an RNA templateB) Synthesis of double-stranded RNA from an RNA templateC) Synthesis of double-stranded RNA from a DNA templateD) Transcription of mRNA from DNAE) Synthesis of DNA from a DNA template
    B
  16. An infectious protein is aA) Bacteriophage.B) Prion.C) Retrovirus.D) Viroid.E) Papovavirus.
    B
  17. An envelope is acquired during which of the following steps?A) PenetrationB) AdsorptionC) UncoatingD) BiosynthesisE) Release
    E
  18. Which of the following contributes to the difficulty in establishing the etiology of cancer?A) Most viral particles can infect cells without inducing cancer.B) Cancer may not develop until long after infection.C) Cancers do not seem to be contagious.D) Viruses are difficult to observe.E) All of the above.
    E
  19. An example of a latent viral infection isA) Subacute sclerosing panencephalitis.B) Cold sores.C) Influenza.D) Smallpox.E) Mumps.
    B
  20. The most common route of accidental AIDS transmission to health care workers isA) Mouth to mouth.B) Fecal–oral.C) Needlestick.D) Aerosol.E) Environmental surface contact.
    C
  21. Assume you have isolated an unknown virus. It is a single-stranded RNA, enveloped virus. To which group does it most likely belong?A) HerpesvirusB) PicornavirusC) RetrovirusD) TogavirusE) Papovavirus
    D
  22. To which group does a small, nonenveloped single-stranded RNA virus most likely belong?A) HerpesvirusB) PicornavirusC) RetrovirusD) TogavirusE) Papovavirus
    B
  23. The most conclusive evidence that viruses cause cancers is provided byA) Finding oncogenes in viruses.B) The presence of antibodies against 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.
    C
  24. Bacteriophages derive all of the following from the host cell EXCEPTA) Lysozyme.B) tRNA.C) Amino acids.D) Nucleotides.E) A.T.P.
    A
  25. Generalized transduction differs from specialized transduction in that generalized transductionA) Kills the host.B) Transfers DNA from one cell to another. C) Transfers specific DNA.D) Involves lysogeny.E) Lyses the host cell.
    C
  26. Generally, in a DNA-containing virus infection, the host animal cell supplies all of the following EXCEPTA) RNA polymerase.B) Nucleotides.C) DNA polymerase.D) tRNA.E) All of the above are supplied by the host animal cell
    C
  27. Put the following in the correct order for DNA-virus replication: 1-Maturation;  2-DNA synthesis;  3-Transcription;  4-Translation.A) 1, 2, 3, 4B) 2, 3, 4, 1C) 3, 4, 1, 2D) 4, 1, 2, 3E) 4, 3, 2, 1
    B
  28. A viral species is a group of viruses thatA) Have the same morphology and nucleic acid.B) Have the same genetic information and ecological niche.C) Infect the same cells and cause the same disease.D) Can't be defined.
    B
  29. Viruses that have reverse transcriptase are in theA) Retroviridae and Picornaviridae.B) Herpesviridae and Retroviridae.C) Hepadnaviridae and Retroviridae.D) Bacteriophage families.E) Influenzavirus.
    C
  30. DNA made from an RNA template will be incorporated into the virus capsid ofA) Retroviridae.B) Herpesviridae.C) Hepadnaviridae.D) Bacteriophage families.E) Influenzavirus.
    C
  31. Which of the following statements about viruses is false?A) Viruses contain DNA or RNA but never both.B) Viruses contain a protein coat.C) Viruses use the anabolic machinery of the cell.D) Viruses use their own catabolic enzymes.E) Viruses have genes.
    D
  32.  Approximately how many virus particles could fit along a 1-millimeter line?A) 2B) 20C) 200D) 20,000E) 2,000,000
    D
  33. Some viruses, such as human herpesvirus 1, infect a cell without causing symptoms; these are calledA) Latent viruses.B) Lytic viruses.C) Phages.D) Slow viruses.E) Unconventional viruses.
    A
  34. The following steps occur during multiplication of herpesviruses. What is the third step?A) AttachmentB) BiosynthesisC) PenetrationD) ReleaseE) Uncoating
    E
  35. The following steps occur during multiplication of retroviruses. What is the fourth step?A) Synthesis of double-stranded DNAB) Synthesis of + RNAC) AttachmentD) PenetrationE) Uncoating
    A
  36. Nontoxic strains of Vibrio cholerae can become toxic when they are in the human intestine with toxic strains of bacteria. This suggests that the toxin genes are acquired byA) Host enzymes.B) Prions.C) Reverse transcriptase.D) Transduction.E) None of the above.
    D
  37. Which one of the following steps does NOT occur during multiplication of a picornavirus?A) Synthesis of + strands of RNAB) Synthesis of - strands of RNAC) Synthesis of viral proteinsD) Synthesis of DNAE) None of the above
    D
  38. Which of the following is most likely a product of an early gene?  A) Capsid proteinsB) DNA polymeraseC) Envelope proteinsD) Spike proteinsE) Lysozyme
    B
  39. Most RNA viruses carry which of the following enzymes?A) DNA-dependent DNA polymeraseB) LysozymeC) RNA-dependent RNA polymeraseD) Reverse transcriptaseE) ATP synthase
    C
  40. The following steps occur during biosynthesis of a + strand RNA virus. What is the third step?A) AttachmentB) Penetration and uncoatingC) Synthesis of - strand RNAD) Synthesis of + strand RNAE) Synthesis of viral proteins
    C
  41. What contributes to antigenic shift in influenza viruses?A) Worldwide distributionB) Segmented genomeC) Attachment spikesD) Ease of transmissionE) Different subtypes
    B

What would you like to do?

Home > Flashcards > Print Preview