Review In Microbiology

99 Questions | Total Attempts: 155

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Review In Microbiology

This 100-item multiple choice examination covers the basics of Microbiology. Included are some topics in Parasitology, Serology, and Immunology. You may answer this test for only 63 minutes. Please enter your first and last names in the field. Multiple attempts are allowed, just key in your name at every attempt.


Questions and Answers
  • 1. 
    Which of the following is not a eukaryote?
    • A. 

      Fungus

    • B. 

      Virus

    • C. 

      Protozoan

    • D. 

      Arthropod

    • E. 

      Helminth

  • 2. 
    An aqueous or alcohol solution of a single basic dye is a
    • A. 

      Simple stain

    • B. 

      Mordant

    • C. 

      Counterstain

    • D. 

      Decolorizer

    • E. 

      None of the above

  • 3. 
    Safranin red is used in Gram staining as a
    • A. 

      Decolorizer

    • B. 

      Primary stain

    • C. 

      Mordant

    • D. 

      Secondary stain

    • E. 

      None of the above

  • 4. 
    The commonly employed negative staining procedure in the lab uses
    • A. 

      Dorner's stain

    • B. 

      Gram's iodine

    • C. 

      Nigrosin

    • D. 

      Levaditi silver impregnation

    • E. 

      Fulton-Schaffer's staining method

  • 5. 
    Assume that you are viewing a Gram-stained field of red cocci and blue bacilli through a microscope. You can safely conclude that you have
    • A. 

      Made a mistake in staining.

    • B. 

      Two different species.

    • C. 

      Old bacterial cells.

    • D. 

      Young bacterial cells.

    • E. 

      None of the above

  • 6. 
    A specific antibiotic disrupts plasma membranes by combining with sterols. It will affect all of the following cells except
    • A. 

      Animal cells.

    • B. 

      Bacterial cells.

    • C. 

      Fungal cells.

    • D. 

      Mycoplasma cells.

    • E. 

      Plant cells.

  • 7. 
    The enzyme portion that serve as the binding site for regulator molecules is known as the
    • A. 

      Active site.

    • B. 

      Allosteric site.

    • C. 

      Holoenzyme.

    • D. 

      Cofactor

    • E. 

      Activator.

  • 8. 
    The following statements describe fermentation except that it
    • A. 

      Releases energy from sugars or other organic molecules such as amino acids, organic acids, purines, and pyrimidines

    • B. 

      Produces a great yield of ATP

    • C. 

      Uses an organic molecule as the final electron acceptor.

    • D. 

      Does not require the use of the Krebs cycle or an electron transport chain

    • E. 

      Does not require oxygen

  • 9. 
    The bacterial phase of growth wherein the microbial population is undergoing a period of intense metabolic activity involving, in particular, synthesis of enzymes and various molecules is the
    • A. 

      Lag phase.

    • B. 

      Logarithmic phase.

    • C. 

      Stationary phase.

    • D. 

      Death phase.

    • E. 

      None of the above

  • 10. 
    All of the following are direct methods of measurement of bacterial growth except
    • A. 

      Plate count

    • B. 

      Pour plate and spread plate

    • C. 

      Turbidimetric method

    • D. 

      Petroff-Hausser cell counter

    • E. 

      None of the above

  • 11. 
    The cultivation of anaerobic bacteria would require the use of
    • A. 

      General isolation medium

    • B. 

      Reducing medium

    • C. 

      Special medium

    • D. 

      Selective medium

    • E. 

      Differential medium

  • 12. 
    Which of the following statements is/are true regarding alcohol?
    • A. 

      A 70% isopropyl alcohol solution is a sterilizing agent.

    • B. 

      It denatures proteins and damages lipids thus altering membrane permeability.

    • C. 

      It kills all forms of microbial life including the endospores.

    • D. 

      All of the above

    • E. 

      None of the above

  • 13. 
    Which of the following is used to control microbial growth in foods?
    • A. 

      Organic acids

    • B. 

      Alcohols

    • C. 

      Aldehydes

    • D. 

      Heavy metals

    • E. 

      None of the above

  • 14. 
    Specialized transduction would not be possible without
    • A. 

      Jumping genes.

    • B. 

      Pol gene.

    • C. 

      Bacteriophages.

    • D. 

      Oncogenes.

    • E. 

      All of the above

  • 15. 
    Which among the following taxonomic groups is the most specific?
    • A. 

      Phylum

    • B. 

      Order

    • C. 

      Kingdom

    • D. 

      Family

    • E. 

      Class

  • 16. 
    Which of the following is not true about scientific nomenclature?
    • A. 

      Each name is specific.

    • B. 

      Names vary with geographical location.

    • C. 

      The names are standardized.

    • D. 

      Each name consists of a genus and a specific epithet.

    • E. 

      It was first designed by Linnaeus.

  • 17. 
    A patient suspected of UTI submitted a blue-green colored urine specimen for microbial analysis. The color of her urine gives a preliminary clue that the causative agent is
    • A. 

      Escherichia

    • B. 

      Pseudomonas

    • C. 

      Campylobacter

    • D. 

      Burkholderia

    • E. 

      Afipia

  • 18. 
    Multicellular fungi are
    • A. 

      Molds

    • B. 

      Yeasts

    • C. 

      Dimorphic

    • D. 

      Coenocytic

    • E. 

      Pathologic

  • 19. 
    Which is the causative agent of a fungal skin infecton characterized by hypopigmentation and fluorsecene under Wood's lamp?
    • A. 

      Malassezia furfur

    • B. 

      Coccidioides immitis

    • C. 

      Candida albicans

    • D. 

      Blastomyces dermatitidis

    • E. 

      Rhizopus

  • 20. 
    Protozoans with flagella are classified under
    • A. 

      Ciliophora

    • B. 

      Mastigophora

    • C. 

      Microspora

    • D. 

      Euglenozoa

    • E. 

      None of the above

  • 21. 
    Which is/are (a) vector/s for Plasmodium parasites?
    • A. 

      Female Aedes mosquito

    • B. 

      Female Anopheles mosquito

    • C. 

      Female deer mouse

    • D. 

      Female Colorado tick

    • E. 

      A and B only

  • 22. 
    Which of the following is true regarding protozoans?
    • A. 

      The vegetative form of is the cyst.

    • B. 

      Protozoans are prokaryotic organisms.

    • C. 

      Sexual reproduction is by binary fission.

    • D. 

      Asexual reproduction can be achieved through schizogony.

    • E. 

      During ciliate conjugation, two haploid nuclei fuse to form a merozoite.

  • 23. 
    Which of the following is true regarding viral multiplication?
    • A. 

      Animal viruses do not undergo uncoating.

    • B. 

      Bacteriophages attach to plasma membrane proteins and glycoproteins.

    • C. 

      Biosynthesis of bacteriophages can take place in the host cell's DNA or RNA.

    • D. 

      Enveloped viruses bud out from its host animal cell.

    • E. 

      Lysogenic cycle always ends in the rupture of the host cell.

  • 24. 
    The ability of a virus to infect an organism is regulated by
    • A. 

      The host species.

    • B. 

      The type of cells.

    • C. 

      The availability of an attachment site.

    • D. 

      Cell factors necessary for viral replication.

    • E. 

      All of the above

  • 25. 
    Gas gangrene is caused by
    • A. 

      Chromobacterium violaceum

    • B. 

      Virbio cholerae

    • C. 

      Streptococcus pyogenes

    • D. 

      Chlamydia trichomatis

    • E. 

      Clostridium perfringens