Types Of Microorganisms Quiz

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Microorganism Quizzes & Trivia

Simply put, a microorganism is a single celled form of existence or a colony of cells. There are a wide variety of microorganisms, some of which are beneficial and otherwise. The type of microorganisms quiz has more.


Questions and Answers
  • 1. 
    Disease-causing microorganisms are called
    • A. 

      Decomposers

    • B. 

      Prokaryotes

    • C. 

      Pathogens

    • D. 

      Eukaryotes

  • 2. 
    The microorganisms that recycle nutrients by breaking down dead matter and wastes are called
    • A. 

      Decomposers

    • B. 

      Prokaryotes

    • C. 

      Fermenters

    • D. 

      Pathogens

  • 3. 
    The microorganisms that do not have a nucleus in their cell wall are called
    • A. 

      Decomposers

    • B. 

      Prokaryotes

    • C. 

      Pathogens

    • D. 

      Eukaryotes

  • 4. 
    Which activity is an example of biotechnology?
    • A. 

      Bacteria in the soil secreting an antibiotic to kill competitors

    • B. 

      A microbiologist using the microscope to study bacteria

    • C. 

      Humans using yeast to make beer and wine

    • D. 

      Mycobacterium tuberculosis in the lungs causing TB

  • 5. 
    The Dutch merchant who made and used quality magnifying lenses to see and record microorganisms was
    • A. 

      F. Redi

    • B. 

      A. Leeuwenhoek

    • C. 

      L. Pasteur

    • D. 

      J. Lister

  • 6. 
    Spontaneous generation is the belief that
    • A. 

      Germs cause infectious diseases

    • B. 

      Microbes are diverse and ubiquitous

    • C. 

      Microbes placed in an infusion can grow in it

    • D. 

      Living things arise from nonliving matter

  • 7. 
    Koch's postulates are criteria used to establish that 
    • A. 

      Microbes are found on dust particles

    • B. 

      A specific microbe is the cause of a specific disease

    • C. 

      Life forms can only arise from preexisting life forms

    • D. 

      A specific microbe should be classified in a specific kingdom

  • 8. 
    Which scientist discovered heat resistant bacterial spores
    • A. 

      J. Lister

    • B. 

      R. Koch

    • C. 

      F. Cohn

    • D. 

      A. Leeuwenhoek

  • 9. 
    The rash and/or hemorrhage associated to Rocky Mountain spotted fever and Typhus occur when this bacterium targets the endotheilal cells that line blood vessels
  • 10. 
    This bacterium has a life cycle that includes elementary and reticulate bodies
  • 11. 
    This bacterium is a member parasite that adheres to and damages the mucous membrane of the respiratory, urinary, and reproductuve tracts
  • 12. 
    This bacterium causes a commonly acquired sexually transmitted bacterial disease and Trachoma, the most common cause of blindness
  • 13. 
    Which bacterium was the first organisms to produce oxygen as a byproduct of photosynthesis
  • 14. 
    If microbiologist is studying a specimen at a total mag of 950x, what is the magnifying power of the objective lens if the ocular lens is 10x
    • A. 

      100x

    • B. 

      950x

    • C. 

      850x

    • D. 

      95x

  • 15. 
    Which microscope achieves the greatest resolution and highest magnification
    • A. 

      Bright-field

    • B. 

      Dark-field

    • C. 

      Phase-contrast

    • D. 

      Electron

  • 16. 
    Which microscope bombard a whole, metal-coated specimen with electrons moving back and forth over it
    • A. 

      Fluoresence

    • B. 

      Differential interference contrast

    • C. 

      Scanning electron

    • D. 

      Transmission electron

  • 17. 
    The primary purpose of staining cells on a microscope slide is to
    • A. 

      Kill them

    • B. 

      Secure them to the slide

    • C. 

      Enlarge the cell

    • D. 

      Add contrast in order to see them better

  • 18. 
    A microbiologist makes a fixed smear of bacterial cells and stains them with methylene blue. all the cells appear blue under the oil lens. this is an example of 
    • A. 

      Negative staining

    • B. 

      Using an acidic dye

    • C. 

      Simple staining

    • D. 

      Using acid-fast stai

  • 19. 
    Why is immersion oil often used when viewing specimens under the microscope
    • A. 

      To stain the cells blue

    • B. 

      To prevent smear from drying out

    • C. 

      To slow bacterial movement so you can see cells better

    • D. 

      To increase the resolution

  • 20. 
    Spirochetes have a twisting and flexing locomotion due to 
    • A. 

      Flagella

    • B. 

      Cilia

    • C. 

      Fimbriae

    • D. 

      Periplasmic flagella

  • 21. 
    Magnification is achieved in a compound microscope through the initial magnification of the specimen by the ______ lens. This image is then projected to the _________ lens that will further magnify the specimen to form a virtual image received by the eye
  • 22. 
    The transfer of genes during bacterial conjugation involve rigid, tubular appendages called
    • A. 

      Flagella

    • B. 

      Cilia

    • C. 

      Fimbriae

    • D. 

      Sex pili

  • 23. 
    The term that refers to the presence of flagella all over the cell surface is 
    • A. 

      Amphitrichous

    • B. 

      Atrichous

    • C. 

      Monotrichous

    • D. 

      Peritrichous

  • 24. 
    The outcome of the gram stain is based on differences in cell's 
    • A. 

      Ribosomes

    • B. 

      Inclusions

    • C. 

      Cell wall

    • D. 

      Cell membrane

  • 25. 
    The most immediate result of destruction of a cell's ribosomes would be 
    • A. 

      Material would not be able to cross cell membrane

    • B. 

      Protein synthesis would stop

    • C. 

      Destruction of cell's DNA

    • D. 

      Formation of glycogen inclusions

  • 26. 
    A prokaryotic cell wall that is primarily peptidoglycan with small amounts of teichoic acid and lipoteichoic acid is
    • A. 

      Gram-negative

    • B. 

      Gram-positive

    • C. 

      Archaea

    • D. 

      Spheroplast

  • 27. 
    Endospores are 
    • A. 

      Metabolically inactive

    • B. 

      Resistant to heat and chemical destruction

    • C. 

      Resistant to destruction by radiation

    • D. 

      Living structures

    • E. 

      All of the choices are correct

  • 28. 
    What is the correct sequence for gram stain?
    • A. 

      Gram' iodine, crystal violet, alcohol, safranin

    • B. 

      Crystal violet, safranin, alcohol, gram's iodine

    • C. 

      Crystal violet, gran's iodine, alcohol, safranin

    • D. 

      Option 4

  • 29. 
    All of the following are correct about slime layer, except
    • A. 

      It is a type of glycocalys

    • B. 

      It can be easily washed off the cell

    • C. 

      It protects the cell from loss of water and nutrients

    • D. 

      It plays a roll in cell motility

  • 30. 
    Enzymes are 
    • A. 

      Broken down in reactions that requires energy input

    • B. 

      Proteins and some are RNA that function as catalysts

    • C. 

      Only proteins used up in chemical reactions

    • D. 

      Only RNA and not needed for catabolic reactions

  • 31. 
    Important components of coenzymes are
    • A. 

      Vitamins

    • B. 

      Metallic ions

    • C. 

      Active sites

    • D. 

      Substrates

  • 32. 
    Metabollic pathways that regenerate their starting point is called _____ pathways.
    • A. 

      Linear

    • B. 

      Bi-directional

    • C. 

      Convergent

    • D. 

      Cyclic

  • 33. 
    Glycolysis 
    • A. 

      Uses 2 ATP, produces 2 ATP and requires oxygen

    • B. 

      Uses 2 ATP, produces 4 ATP and requires oxygen

    • C. 

      Uses 2 ATP, produces 2 ATP, without oxygen

    • D. 

      Uses 2 ATP, produces 4 ATP, without oxygen

  • 34. 
    Substrate level phosphorylation in
    • A. 

      Glycolysis and ETC

    • B. 

      Photosynthesis + glycolysis

    • C. 

      Glycolysis + krebs cycle

    • D. 

      Krebs cycle + ETC

  • 35. 
    The majority of reduced NAD/NADH is produced in
    • A. 

      Glycolysis

    • B. 

      Krebs cycle

    • C. 

      ETC

    • D. 

      Photosynthesis

  • 36. 
    In bacterial cells, the ETC is located in 
    • A. 

      Cell membrane

    • B. 

      Mitochondria

    • C. 

      Chloroplasts

    • D. 

      Ribosomes

  • 37. 
    What chemical causes death in many eukaryotes because it blocks cytochrome c oxidase?
    • A. 

      Copper

    • B. 

      Iron

    • C. 

      Cyanide

    • D. 

      Oxygen

  • 38. 
    Define what is meant by emerging and remerging disease OR state Koch's postulates.
  • 39. 
    List two differences between optical light microscope and electron microscope OR differentiate between negative and positive staining using examples
  • 40. 
    Define glycocalyx and describe its different forms OR list and briefly describe two basic layers that make up cell envelope
  • 41. 
    List the mechanisms by which an enzyme lowers the activation energy and brings on the transition state OR what are holoenzymes and give examples. 
  • 42. 
    List and briefly describe the events in nitrogen cycle OR describe life cycle of endospore forming bacteria, including formation and germination of endospores
  • 43. 
    Contrast the major structure of gram-positive and gram-negative cell wall OR what is competitive and noncompetitive inhibition
  • 44. 
    When humans manipulate the genes of microorganisms the process is called
    • A. 

      Bioremediation

    • B. 

      Genetic engineering

    • C. 

      Epidemiology

    • D. 

      Immunology

  • 45. 
    Microorganisms are best defined as organisms that 
    • A. 

      Cause human disease

    • B. 

      Lack cell nucleus

    • C. 

      Are infectious particles

    • D. 

      Are too small to be seen with the unaided eye

  • 46. 
    Organisms called parasites are 
    • A. 

      Always classified in the kingdom monera

    • B. 

      Maybe harmful to their host

    • C. 

      The decomposers in ecosystems

    • D. 

      Always viruses

  • 47. 
    All of the following are correct about prokaryotes, except
    • A. 

      They are smaller than eukaryotes

    • B. 

      They lack nucleus

    • C. 

      They are less complex than eukaryotes

    • D. 

      They have organelles

  • 48. 
    The fossil record has est. that prokaryotes existed on earth for approx 2 billion years before eukaryotes appeared
    • A. 

      True

    • B. 

      False

  • 49. 
    CO2 IS 
    • A. 

      Removed from atmosphere during photosynthesis

    • B. 

      Source of carbon

    • C. 

      Returned to atmosphere during respiration and fermentation

    • D. 

      Used by marine organisms to make limestone for their hard shells

    • E. 

      All of the above

  • 50. 
    The conversion of gaseous nitrogen (N2) to ammonium (NH4+) occurs during
    • A. 

      Ammonification

    • B. 

      Nitrogen fixation

    • C. 

      Photosynthesis

    • D. 

      Nitrification

  • 51. 
    Oxidation of ammonia (NH4+) to nitrate (NO3-) is called
    • A. 

      Ammonification

    • B. 

      Nitrogen fixation

    • C. 

      Photosynthesis

    • D. 

      Nitrification

  • 52. 
    Using microbes to break down and remove toxic wastes in water and soil is called
    • A. 

      Decomposition

    • B. 

      Synergism

    • C. 

      Mineralization

    • D. 

      Bioremediation

  • 53. 
    Type of microscope in which you would see bright illuminated specimens against a black background is
    • A. 

      Bright field

    • B. 

      Dark field

    • C. 

      Phase-contrast

    • D. 

      Fluorescene

  • 54. 
    Gram stain, acid-fast stain, and endospore stain 
    • A. 

      Used on a wet mount of the specimen

    • B. 

      Use heat to force the dye into cell structures

    • C. 

      Have outcomes based on cell wall differences

    • D. 

      Are differential stains

  • 55. 
    What does a positive stain color
  • 56. 
    Basic dyes are
    • A. 

      Attracted to the acidic substances of bacterial cells

    • B. 

      Anionic

    • C. 

      Used in negative staining

    • D. 

      Repelled by cells

  • 57. 
    Positive stain use two or more stains it is referred to as _____ stain
  • 58. 
    The specimen preparation that is best for viewing cell motility is
    • A. 

      Hanging drop

    • B. 

      Fixed stained smear

    • C. 

      Gram stain

    • D. 

      Negative stain

  • 59. 
    Glycocalyx is
    • A. 

      Capsule

    • B. 

      Pili

    • C. 

      Outer membrane

    • D. 

      Cell wall

  • 60. 
    Which of the following is present in gram positive and gram negative cell wall
    • A. 

      Outer membrane

    • B. 

      Teichoic acid

    • C. 

      Peptidoglycan

    • D. 

      Lipopolysaccharides

  • 61. 
    Which of the following prokaryotes lack cell wall
    • A. 

      Rickettsia

    • B. 

      Mycobacterium

    • C. 

      Mycoplasmas

    • D. 

      Archaea

  • 62. 
    Bacterial endospores function in
    • A. 

      Reproduction

    • B. 

      Survival

    • C. 

      Protein synthesis

    • D. 

      Archaea

  • 63. 
    Which of the following IS NOT an example of biofilm
    • A. 

      Single bacterial cell growing on an agar surface

    • B. 

      Toilet bowl scum

    • C. 

      Organisms that colonies indwelling medical devices

    • D. 

      Dental plaque

  • 64. 
    Which of the following is INCORRECT regarding bacterial cell wall?
    • A. 

      It is a target of certain antibiotics

    • B. 

      It determines the shape of bacterium

    • C. 

      It prevents bacterium from bursting due to change in osmotic pressure

    • D. 

      It is composed of repeating framework of lipids

  • 65. 
    Acid-fast stain is used to identify organisms containing what chemical in their cell wall?
    • A. 

      Lipoteichoic acids

    • B. 

      Porin proteins

    • C. 

      Mycolic acid

    • D. 

      Peptidoglycan

  • 66. 
    Chemical analysis of bacterial cell structure detects calcium dipicolinic acid. What is the identity of this structure?
    • A. 

      Cell wall

    • B. 

      Capsule

    • C. 

      Slime layer

    • D. 

      Endospore

  • 67. 
    What is the key differentiating step in gram stain procedure?
    • A. 

      Application of primary stain

    • B. 

      Application of mordant

    • C. 

      Decolorization step

    • D. 

      Application of counterstain

  • 68. 
    The function of bacterial endospores is
    • A. 

      To convert gaseous nitrogen to a usable form for plants

    • B. 

      Reproduction and growth

    • C. 

      For protection of genetic material during harsh conditions

    • D. 

      Storage excess cell materials

  • 69. 
    Which term is not used to describe bacterial cell shape
    • A. 

      Coccus

    • B. 

      Tetrad

    • C. 

      Vibrio

    • D. 

      Rod

  • 70. 
    Which of the following is mismatched
    • A. 

      Rickettsia rickettsii: rocky mountain spotted fever

    • B. 

      Rickettsia typhi: endemic thyphus

    • C. 

      B.burgdoferi: syphillis

    • D. 

      All of the above

  • 71. 
    Identification of bacteria require a study of all but which of the following
    • A. 

      Microscopic and macroscopic morphology

    • B. 

      Bacterial physiology

    • C. 

      Quantitative analysis

    • D. 

      Serological analysis

  • 72. 
    They contain pigment bacteriochlorophyll and do not give off oxygen as a product of photosynthesis
  • 73. 
    _____ organelles in algae and plants are known to have evolved from cyanobacteria by the process of endosymbiosis.
  • 74. 
    These bacteria are small gram neg, obligate intracellular parasites and they tend to alternate between two forms elementary body and reticulate body
    • A. 

      Chlamydia

    • B. 

      Option 2

    • C. 

      Option 3

    • D. 

      Option 4

  • 75. 
    Each of the following are true of enzymes except
    • A. 

      They can be used over and over

    • B. 

      They may or may not require cofactors

    • C. 

      Their active site is specific to substrate

    • D. 

      They increase the activation energy of a reaction

  • 76. 
    An apoenzyme
    • A. 

      Is part of simple enzyme

    • B. 

      Also called coenzyme

    • C. 

      Is the protein part of holoenzyme

    • D. 

      Is often an inorganic metal ion

  • 77. 
    Enzymes that are only produced when substrate is present are termed
    • A. 

      Exoenzymes

    • B. 

      Endoenzymes

    • C. 

      Constitutive enzyme

    • D. 

      Induced enzyme

  • 78. 
    All of the following are exoenzymes except
    • A. 

      Atp synthase

    • B. 

      Streptokinase

    • C. 

      Penicillinase

    • D. 

      Collagenase