Microbiology Exam 1

48 Questions  I  By Nadine317
Please take the quiz to rate it.

Microbiology Quizzes & Trivia

  
Changes are done, please start the quiz.


Questions and Answers

Removing question excerpt is a premium feature

Upgrade and get a lot more done!
  • 1. 
    Semmelweis showed that the transmission of disease could be interrupted by
    • A. 

      Pasteurizing milk

    • B. 

      Washing hands with chlorine water

    • C. 

      Disinfecting water supplies

    • D. 

      Killing disease-carrying mosquitos


  • 2. 
    All of the following characteristics apply to the prokaryotes except
    • A. 

      They reproduce only by mitosis

    • B. 

      They include the bacteria

    • C. 

      They lack a nucleus

    • D. 

      They are composed of single cells


  • 3. 
    Microbiology failed to rapidly develop after Leeuwenhoek's time because
    • A. 

      Pure culture techniques were lacking

    • B. 

      The relationship of microorganisms of disease was not established

    • C. 

      Vaccines were in common use

    • D. 

      The Netherlands was in the midst of a war in England


  • 4. 
    Pasteurs study of fermantation was critical to the development of microbiology because
    • A. 

      Fermentation chemistry occurs in the living body

    • B. 

      It showed that microorganisms bring about chemical changes

    • C. 

      It demonstrated that yeasts are involved in diseases

    • D. 

      The body undergoes rapid fermentation after death


  • 5. 
    Koch's postulates provided guidelines for
    • A. 

      Relating certain microorganisms with certain diseases

    • B. 

      Sterilizing laboratory supples

    • C. 

      Perparing pure cultures

    • D. 

      Testing the sensitivity of microbes to antibiotics


  • 6. 
    The classical Golden Age of microbiology came to an end partly due to the
    • A. 

      All infectious disease were known

    • B. 

      Death of Anton van Leeuwenhoek

    • C. 

      The advent of World War 1

    • D. 

      End of the Renaissance


  • 7. 
    Which one of the following groups is not resolved with the light microscope
    • A. 

      Bacteria

    • B. 

      Fungi

    • C. 

      Viruses

    • D. 

      Molds


  • 8. 
    All of the following characteristics of prokaryotes except
    • A. 

      Prokaryotes have organelles

    • B. 

      Prokaryotes have ribosomes

    • C. 

      Prokaryotes lack a nucleus

    • D. 

      Prokaryotes have genes


  • 9. 
    Prokaryotes and eukaryotes differ primarily with regard to the absence or presence of a cell
    • A. 

      Membrane

    • B. 

      Wall

    • C. 

      Spore

    • D. 

      Nucleus


  • 10. 
    Which one of the following sequences exhibits increasing size
    • A. 

      Viruses to protozoa to bacteria

    • B. 

      Bacteria to viruses to fungi

    • C. 

      Fungi to protozoa to bacteria

    • D. 

      Viruses to bacteria to protozoa


  • 11. 
    The gram stain technique is valuable in distinguishing
    • A. 

      Type of fungi

    • B. 

      The size and structure of viruses

    • C. 

      The nucleus of bacteria from other cellular organelles

    • D. 

      Types of bacteria


  • 12. 
    Unicellular photosynthetic microbes that are eukaryotic are members of the
    • A. 

      Protista

    • B. 

      Monera

    • C. 

      Plantae

    • D. 

      Fungi


  • 13. 
    In the log phased of growth
    • A. 

      The death rate is equivalent to the reproductive rate

    • B. 

      The number of cells in the population increases rapidly

    • C. 

      The growth curve is at a plateau

    • D. 

      Spore formation is a common event


  • 14. 
    All the following are functions of the bacterial cell membrane except
    • A. 

      Lends ridigity to the cell

    • B. 

      Site of enzymes for energy production in the cell

    • C. 

      Enclosure for the cytoplasm

    • D. 

      Control of passage of biological molecules into the cytoplasm


  • 15. 
    Psychrophiles and thermophiles differ with respect to their
    • A. 

      Oxygen requirements

    • B. 

      Ability to tolerate salt

    • C. 

      PH requirements

    • D. 

      Best temperature for growth


  • 16. 
    An organism having pili has the advantage over one that alcks pili because
    • A. 

      It can move actively

    • B. 

      It can attach to specific surfaces

    • C. 

      It can obtain nutrients from beef broth

    • D. 

      It can be stained easily


  • 17. 
    Facultative bacteria are those that
    • A. 

      Grow on natural and synthetic media

    • B. 

      Produce spores or capsules, but not both

    • C. 

      Grow in the presence or absence of oxygen

    • D. 

      Possess cell membranes but no cell walls


  • 18. 
    ATP releases its energy by
    • A. 

      Activating its protons to form ions

    • B. 

      Absorbing heat from the enviornment

    • C. 

      Combing with other ATP molecules

    • D. 

      Splitting into a phosphate and ADP


  • 19. 
    In order for oxidative phosphorylation to take place, the environment must contain a certain amound of
    • A. 

      Oxygen

    • B. 

      Sunlight

    • C. 

      Energy supplied by atp

    • D. 

      Isotopes


  • 20. 
    The krebs cycle accounts for all the following except
    • A. 

      Production of CO2 molecules

    • B. 

      Production of NADH and FADH2

    • C. 

      Production of pyruvate from glucose

    • D. 

      Production of electrons for oxidative phosphorylation


  • 21. 
    The peptidoglycan of a bacterium
    • A. 

      Is embedded within the capsule

    • B. 

      Cannot be assembled if penicillin is present

    • C. 

      Is part of the cell membrane

    • D. 

      Is found in gram-positive bacteria only


  • 22. 
    Monotrichous and pritrichous bacteria differ in
    • A. 

      Their nutritional requirements

    • B. 

      Layers of the cell wall

    • C. 

      Spores formed per cell

    • D. 

      Number and position of the flagella


  • 23. 
    Enzymes play an important role in biological chemistry because they
    • A. 

      Break down to release metal ions

    • B. 

      Lower the amount of activation energy required for a reaction

    • C. 

      Raise the ionic strength of a water solution

    • D. 

      Retain the pH at the neutral level preferred by most microorganisms


  • 24. 
    Two important coenzymes that function inoxidative phosphorylation are
    • A. 

      ATP and acetyl CoA

    • B. 

      DNA and ATP

    • C. 

      NADP and ATP

    • D. 

      FAD and NAD+


  • 25. 
    Electrons for oxidative phosphorylation can originate from
    • A. 

      Only the Krebs cycle reactions

    • B. 

      Only the reactions of fermentation

    • C. 

      Only the reactions of glycolysis

    • D. 

      Both the krebs cycle and glycolysis reactions


  • 26. 
    All of the following characteristics apply to enzymes except
    • A. 

      Some enzymes are made entirely of protein

    • B. 

      ATP is an enzyme

    • C. 

      Heat alters the tertiary structure of enzymes

    • D. 

      Enzymes are reusable


  • 27. 
    The catabolic process in which glucose is converted into pyruvate is called
    • A. 

      Glycolysis

    • B. 

      The Krebs Cycle

    • C. 

      Fermentation

    • D. 

      Oxidative phosphorylation


  • 28. 
    UV light may induce a mutation by
    • A. 

      Dissolving the cell membrane of a bacterium

    • B. 

      Preventing synthesis of ATP during oxidative phosphorylation

    • C. 

      Restricting transcription of RNA molecules

    • D. 

      Binding together adjacent thymine molecules on the DNA molecule


  • 29. 
    The base sequence of a messenger RNA molecule that is complementary to the sequence CGTTAGA would be expressed as
    • A. 

      CGTTAGA

    • B. 

      GCAAUCU

    • C. 

      GCUUTCT

    • D. 

      GCAATCT


  • 30. 
    The major activity of transcription is to
    • A. 

      Copy DNA

    • B. 

      Pair codons with anticodons

    • C. 

      Produce amino acids

    • D. 

      Produce RNA molecules


  • 31. 
    All the following apply to the process of protein synthesis except
    • A. 

      The mRNA sequence is the same as that on the DNA template strand

    • B. 

      Amino acids are joined to one another at the ribosome

    • C. 

      The process requires expenditure of energy

    • D. 

      The gene must unwind before mRNA can be synthesized


  • 32. 
    All the following function in the process of protein synthesis except
    • A. 

      RNA polymerase

    • B. 

      Electron transport

    • C. 

      Cytosine and uracil

    • D. 

      Amino acids


  • 33. 
    The mRNA that codes for a particular protein will have ___ nucleotides for each amino acid in the protein
    • A. 

      1

    • B. 

      2

    • C. 

      3


  • 34. 
    In the operon, genes that code for enzymes are called
    • A. 

      Structural genes

    • B. 

      Operator genes

    • C. 

      Repressor genes

    • D. 

      Inducer genes


  • 35. 
    The chromosome of Escherichia coli
    • A. 

      Is a linear chromosome

    • B. 

      Has about 4300 genes

    • C. 

      Is surrounded by a membraned

    • D. 

      Contains some 35000 genes


  • 36. 
    The genome of a bacterium consists of
    • A. 

      All the structural genes in the chromosome

    • B. 

      The complete set of genetic information

    • C. 

      All the RnA molecule in a cell

    • D. 

      All the proteins in a cell


  • 37. 
    Restriction enzymes are notable for their ability to
    • A. 

      Stitch together fragments of DNA

    • B. 

      Produce Okazaki fragments from plasmids

    • C. 

      Split nucleic acid molecules at a specific point

    • D. 

      Induce transformations


  • 38. 
    Generalized transduction is carried out by
    • A. 

      Virulent phages that have a lysogenic cycle

    • B. 

      Temperate phages that undergo lysogeny

    • C. 

      Virulent phages that have a lytic cycle

    • D. 

      Temperate phages that are incapable of lysogeny


  • 39. 
    Through the techniques of genetic engineering, you have produced a plasmid that contains a gene for human insulin. Such a plasmid is called a(n)
    • A. 

      Human plasmid

    • B. 

      Recombinant plasmid

    • C. 

      F' prime plasmid

    • D. 

      F* plasmid


  • 40. 
    In the prodromal phase, symptoms
    • A. 

      Are their height

    • B. 

      May include nausea, fever, and headache

    • C. 

      Have begun to disappear

    • D. 

      Have not developed yet and there is no sign of disease


  • 41. 
    Which one of the following does not apply to endotoxins
    • A. 

      They are composed exclusively of protein

    • B. 

      They are part of the bacterial cell wall

    • C. 

      They are present in gram-negative bacteria

    • D. 

      All the above (A-C) are correct


  • 42. 
    A normal flora may be found in all the following enviornments except
    • A. 

      The blood

    • B. 

      The pharynx

    • C. 

      The vagina

    • D. 

      The upper respiratory tract


  • 43. 
    Hyaluronidase is a bacterial enzyme that
    • A. 

      Induces blood clot formation in the host

    • B. 

      Encourages movement in the organism

    • C. 

      Enhances penetration through the host tissues

    • D. 

      Convert toxins to toxoids


  • 44. 
    The cell that matures in the thymus gland
    • A. 

      Localizes in the skin tissues

    • B. 

      Becomes a plasma cell

    • C. 

      Is responsible for cell-mediated immunity

    • D. 

      Produces antibodies


  • 45. 
    Which one of the following is not an effect of complement activation
    • A. 

      Lysis of the cell through cytoplasm leakage

    • B. 

      Attraction of phagocytes

    • C. 

      Enhanced T-lymphocyte activity through thymus gland interactions

    • D. 

      Formation of an attack complex


  • 46. 
    A non-specific resistance factor effective against viral infection is
    • A. 

      Lysozyme

    • B. 

      Bile

    • C. 

      Interferon

    • D. 

      Complement


  • 47. 
    Natural Killer (NK) cells can be describe by all of the following except
    • A. 

      NK cells have special receptors on th esurface of their membrane

    • B. 

      NK cells recognize the body's cells and do not attack them

    • C. 

      NK cells bind to the target cell and induce lysis

    • D. 

      NK cells rely on class II MHC proteins to seperate normal cells from target cells


  • 48. 
    The link between macrophages and neutrophils is that both cells
    • A. 

      Are phagocytes

    • B. 

      Have large granules in the cytoplasm

    • C. 

      Lack a nucleus

    • D. 

      Have a life span of about 10 years.


Back to top

Removing ad is a premium feature

Upgrade and get a lot more done!
Take Another Quiz
We have sent an email with your new password.