Microbiology Exam Hardest Trivia Questions! Quiz

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Microbiology Quizzes & Trivia

How well have you understood all the topics you have covered in microbiology so far, and there is much that you get to know when it comes to the topics? Do you think that you can handle all of them at once and stand a chance to be different from all the rest who took it and didn’t get them all right?


Questions and Answers
  • 1. 
    Harvest energy from sunlight
    • A. 

      Fermentation

    • B. 

      Anaerobic

    • C. 

      Aerobic

    • D. 

      Phototroph

  • 2. 
    Obtains carbon from CO2
    • A. 

      Photoheterotroph

    • B. 

      Photoautotroph

    • C. 

      Phototroph

  • 3. 
    Obtains carbon from organic compounds
    • A. 

      Photoautotroph

    • B. 

      Phototroph

    • C. 

      Photoheterotroph

  • 4. 
    Phototroph that does not produce O2
    • A. 

      Chemotroph

    • B. 

      Anoxygenic phototroph

    • C. 

      Oxygenic phototroph

  • 5. 
    Phototroph that produces O2
    • A. 

      Oxygenic phototroph

    • B. 

      Anoxygenic phototroph

    • C. 

      Phototroph

  • 6. 
    Harvests evergy by oxidizing chemicals
    • A. 

      Chemoorganotroph

    • B. 

      Chemotroph

    • C. 

      Aerobic

  • 7. 
    Oxidizes inorganic chemical
    • A. 

      Chemolithotroph

    • B. 

      Fermentation

    • C. 

      Chemoorganotroph

  • 8. 
    Oxidizes organic chemicals
    • A. 

      Oxygeic phototroph

    • B. 

      Chemoorganotroph

    • C. 

      Chemolithotroph

  • 9. 
    Uses O2 as terminal electron acceptor
    • A. 

      Aerobic respiration

    • B. 

      Anaerobic respiration

    • C. 

      Fermentation

  • 10. 
    Uses another terminal electron acceptor besides O2
    • A. 

      Fermentation

    • B. 

      Anaerobic

    • C. 

      Aerobic

  • 11. 
    Not respiration (no electron chain), uses organic compound as electron acceptor
    • A. 

      Phototroph

    • B. 

      Fermentation

    • C. 

      Anaerobic

  • 12. 
    Many anerobic organsism are intolerant of O2
    • A. 

      True

    • B. 

      False

  • 13. 
    Chemolithotrophs oxidize reduced inorganic chemicals to produce energy, use alternate terminal electron acceptor other than oxygen what are they
    • A. 

      Carbon dioxide

    • B. 

      Sodium

    • C. 

      Sulfur

    • D. 

      Oxygen

    • E. 

      Both A and C are correct

  • 14. 
    Members of Domain Archaea, produce energy by oxidizing hydrogen gas and using carbon dioxide as terminal electron (this process creates methane and water)
    • A. 

      Fermentation

    • B. 

      Anaerobic respiration

    • C. 

      Methanogens

    • D. 

      Chemmoorganotrophs

  • 15. 
    Methanogens commonly found in sewage, swams, marien sediments and digestive tract of mammals
    • A. 

      False

    • B. 

      True

  • 16. 
    Methanogens are not highly sensitive to oxygen (anerobic chambers used for cultivation)
    • A. 

      True

    • B. 

      False

  • 17. 
    Some anaerobic chemoorganotrophs produce ATP via _________________________ through the oxidation of organic molecules (use terminal electron acceptor other than oxygen sulfur and sulfate are common)
    • A. 

      Fermentation

    • B. 

      Anaerobic respiration

    • C. 

      Methanogens

  • 18. 
    Other anaerobic chemoorganotrophs produce energy through fermentation
    • A. 

      Use terminal electron acceptor other than oxygen

    • B. 

      Produce energy though substrate phosphorylation only

    • C. 

      Produce energy

  • 19. 
    Sulfur and sulfate-reducing bacteria use sulfur as terminal electron acceptors and oxidize organic material it also
    • A. 

      Reduce it to hydrogen sulfide (responsible for rotten egg smell)

    • B. 

      These organisms essential for sulfur cyle in ecosystem

    • C. 

      Generally found in mud rich in organic matter and sulfur

    • D. 

      All of the above are correct

    • E. 

      None of the above are correct

  • 20. 
    Some anaerobes use fermentation to obtain energy and what else is true
    • A. 

      Members of genus Clostridium are Gram-positive

    • B. 

      Produce endospores

    • C. 

      Common inhabitant of soil

    • D. 

      All of the above are correct

    • E. 

      Only A and B are correct

  • 21. 
    Some anaerobes use fermentation to obtain energy, members of genus Clostridium are Gram-positive rods, ferment a wide variety of compounds in process of putrefaction. What are they (check all that applies)
    • A. 

      Sugars

    • B. 

      Cellulose

    • C. 

      Amino acid

    • D. 

      Carbohydrates

    • E. 

      Glucose

  • 22. 
    Are Gram-positive organism that produce latic acid as an end product of fermentation...
    • A. 

      Lactic base bacteria

    • B. 

      Lactic acid bacteria

    • C. 

      Obligate fermenters

  • 23. 
    Most organisms of this group can grow in aerobic environments but are obligate fermenters
    • A. 

      True

    • B. 

      False

  • 24. 
    (Group A streptococcus) pharyngitis (strep throat), rheumatic fever, glomerulonephritis, and streptococcal toxic shock
    • A. 

      S. pyogenes

    • B. 

      S. agalactae

    • C. 

      S. pneumoniae

    • D. 

      S. mutans and other viridans streptococci

  • 25. 
    (Group B streptococcus) colonize vaginal tract so some women and can cause neonatal meningitis and sepsis
    • A. 

      S. pyogenes

    • B. 

      S. pneumoniae

    • C. 

      S. agalactiae

    • D. 

      S. mutans and other viridans streptococci

  • 26. 
    Pneumonia and meningitis
    • A. 

      S. pneumoniae

    • B. 

      S. mutans and other viridans streptococci

    • C. 

      S. pyogenes

    • D. 

      S. agalactiae

  • 27. 
    Dental caries, can lead to infectious endocarditis
    • A. 

      S. pneumoniae

    • B. 

      S. agalactiae

    • C. 

      S. pyogenes

    • D. 

      S. mutans and other viridans streptococci

  • 28. 
    Streptococcus spp. do not have catalase, major distinguishing test
    • A. 

      False

    • B. 

      True

  • 29. 
    Formally included in Streptococcus genes (group D), normal flora of the gut, can cause urinary, biliary, and cardiovascular infections
    • A. 

      Enterococi

    • B. 

      Lactobacillus

    • C. 

      Lactococcus

  • 30. 
    Normal flora of mouth, colon, and female genital tract, main source of lactic acid in the vagina (low pH), may play a role in dental caries, production of fermented foods (yogurt)
    • A. 

      Enterococci

    • B. 

      Lactobacillus

    • C. 

      Lactococcus

  • 31. 
    Fermented milk products (yogurt, cheese )
    • A. 

      Lactococcus

    • B. 

      Lactobacillus

    • C. 

      Enterococci

  • 32. 
    Propionibacterium species are Gram positive rods, organisms produce propionic acid as end product of fermentation (essential in the production of Swiss cheese, These organisms can also ferment lactic acid) can extract residual energy from waste product (lactic acid) of other organisms
    • A. 

      Anaerobic Chemotrophs

    • B. 

      Anoxygenic Phototrophs

    • C. 

      Oxygenic Phototrophs

  • 33. 
    Likely the first photosynthesizing organisms on earth, oxidize hydrogen sulfide or organic molecules when making NADPH (don't generate O2), many organisms inhabit restricted ecological niche with sunlight but no O2 (aquatic habitats such as bogs, lakes and upper layers of mud, includes purple bacteria and green bacteria
    • A. 

      Anoxygenic Phototrophs

    • B. 

      Oxygenic Phototrophs

    • C. 

      Anaerobic Chemotrophs

  • 34. 
    Gram- appear red, orange or purple due to pigments used in photosynthesis
    • A. 

      Purple sulfur bacteria

    • B. 

      Purple bacteria

    • C. 

      Purple non-sulfur bacteria

  • 35. 
    Found in sulfur-rich springs, prefer hydronge sulfide to generate reducing power, most are strict anaerobes, some can grow aerobically and in absence of light
    • A. 

      Purple bacteria

    • B. 

      Purple sulfur bacteria

    • C. 

      Purple non-sulfur bacteria

  • 36. 
    Found in moist soil, bogs, paddy fields, prefer organic molecules to generate reducing power, ost can grow aerobically and in absence of light
    • A. 

      Purple non-sulfur bacteria

    • B. 

      Purple bacteria

    • C. 

      Purple sulfur bacteria

  • 37. 
    Gram-, typically green or brown
    • A. 

      Green bacteria

    • B. 

      Green sulfur bacteria

    • C. 

      Green non-sulfur

  • 38. 
    Found in sulfur-rich habitats use hydrogen sulfide to generate reducing power, have gas vesicles, all are strict anaerobes
    • A. 

      Green non-sulfur

    • B. 

      Green bacteria

    • C. 

      Green sulfur bacteria

  • 39. 
    Filamentous growth, use organic molecules to generate reducing power, can grow aerobically and in absence of light
    • A. 

      Green bacteria

    • B. 

      Green non-sulfur bacteria

    • C. 

      Green sulfur bacteria

  • 40. 
    Photosynthetic bacteria that use water as source of electrons, oxidation of water liberates oxygen, cyanobacteria though to be earliest oxygenic phototrophs, converted early atmosphere to O2 due to photosynthesis, Cyanobacteria act as primary producers (harvest sunlight to produce organic compounds through conversion of carbon dioxide)
    • A. 

      Oxygenic Phototrophs

    • B. 

      Anaerobic Chemotrophs

    • C. 

      Anoxygenic Phototrophs

  • 41. 
    Morphologically diverse (chains, singel cells, mats), wide range of environments (Aquatic, terrestrial), chloroplasts of plant likely evolved, nitrogen fixation, convert nitrogen gas to ammonia, extremely important, only bacteria can do this, converts inorganic nitrogen to organic nitrogen without which all life would cease to exist, nitrogenase is extremely sensitive to O2 usually maintained in heterocysts
    • A. 

      Bacteria

    • B. 

      Cyanobacteria

    • C. 

      Sulfur-Oxidizing bacteria

  • 42. 
    Obtain envergy oxidizing inorganic chemicals, use oxygen as terminal electron acceptor
    • A. 

      Oxygenic Phototrophs

    • B. 

      Aerobic Chemolithotrophs

    • C. 

      Aerobic Chemoorganotrophs

  • 43. 
    Obtain energy though oxidation of reduced sulfur, hydrogen sulfide, elemental sulfur and thiosulfate, produce sulfuric acid
    • A. 

      Sulfur-oxidizing bacteria (Gram-)

    • B. 

      Filamentous sulfur oxidizers

    • C. 

      Unicellular sulfur oxidizers

  • 44. 
    Sulfur springs, sewage polluted waters accumulate sulfur in granules, cause 'bulking" in sewage treatment
    • A. 

      Unicellular sulfur oxidizers

    • B. 

      Filamentous sulfur oxidizers

    • C. 

      Sulfur-oxidizing bacteria

  • 45. 
    Terrestrial and aquatic enviornments, bioleaching through oxidation of metal sulfides produces sulfuric acid and liquid metal, serious negative environmetnal consequences, toxic runoff
    • A. 

      Filamentous sulfur oxidizers

    • B. 

      Unicellular sulfur oxidizers

    • C. 

      Sulfur-oxidizing bacteria

  • 46. 
    Obtain energy by oxidizing inorganic nitrogen, important in the breakdown of ammonia-containing waste, overgrowth in nitrogen-polluted waters can cause hypoxia
    • A. 

      Nitrifiers (G-)

    • B. 

      Hydrogen-oxidizing bacteria (G-)

  • 47. 
    • A. 

      Ammonia-----> nitrite

    • B. 

      Nitrite----> nitrate

  • 48. 
    Nitrite oxidizers
    • A. 

      Ammonia -----> nitrite

    • B. 

      Nitrite -----> nitrate

  • 49. 
    Obtain envery by oxidizing hydrogen, tend to be thermophilic (hot springs), some members thrive at 95 degrees
    • A. 

      Nitrifiers (G-)

    • B. 

      Hydrogen-oxidizing bacteria (G-)

  • 50. 
    Obtain energy by oxidizing organic compounds use oxygen as terminal electron acceptor, tremendous variety of organisms
    • A. 

      Aerobic Chemoorganotrophs

    • B. 

      Aerobic Chemolithotrophs

    • C. 

      Oxygenic Phototrophs

  • 51. 
    Use aerobic respiration exclusively (No fermentation), examples: Micrococcus, Pseudomonas, Mycobacterium, Thermus, Deinococcus
    • A. 

      Facultative anaerobes

    • B. 

      Obligate aerobes

  • 52. 
    Preferentially use aerobic respiration, can use fermentation as alternative in absence of oxygen, examples: Corynebacterium, Enterobacteriaciae
    • A. 

      Obligate aerobes

    • B. 

      Facultative anaerobes

  • 53. 
    Bacteria that inhabit soil can form resting stages that enable survival
    • A. 

      True

    • B. 

      False

  • 54. 
    Bacillus and Clostridium
    • A. 

      Endospores

    • B. 

      Cysts

    • C. 

      Fruiting bodies

    • D. 

      Mycelium

  • 55. 
    Azotobacter
    • A. 

      Cysts

    • B. 

      Endospores

    • C. 

      Fruiting bodies

    • D. 

      Mycelium

  • 56. 
    Myxobacteria (microcyst)
    • A. 

      Fruiting bodies

    • B. 

      Mycelium

    • C. 

      Cysts

    • D. 

      Endospores

  • 57. 
    Streptomyces (conidia)
    • A. 

      Mycelium

    • B. 

      Fruiting bodies

    • C. 

      Cysts

    • D. 

      Endospores

  • 58. 
    Plants turmor to gain nutrient (often fatal to plant)
    • A. 

      Agrobacterium

    • B. 

      Rhizobium

  • 59. 
    Mutually beneficial relationship (symbiosis) with plants, bacteria fix nitrogen that is used as nutrient source fo the plant
    • A. 

      Rhizobium

    • B. 

      Agrobacterium

  • 60. 
    Aquatic environment nutrient-poor bacteria have mechanisms for nutrient acquistion and retention
    • A. 

      True

    • B. 

      False

  • 61. 
    Sphaerotilus, Leptothrix
    • A. 

      Sheathed bacteria

    • B. 

      Prosthecate bacteria

    • C. 

      Predator bacteria

    • D. 

      Bioluminescent bacteria

  • 62. 
    Caulobacter hyphomicrobium, stalk attaches to favorable environment
    • A. 

      Prosthecate bacteria

    • B. 

      Predator bacteria

    • C. 

      Bioluminescent bacteria

    • D. 

      Sheathed bacteria

  • 63. 
    Bdellovibrio attack, invade, and eat bacteria
    • A. 

      Bioluminescent bacteria

    • B. 

      Predator bacteria

    • C. 

      Prosthecate bacteria

    • D. 

      Sheathed bacteria

  • 64. 
    Vibrio symbiotic relationships with host, food and protection in exchange for light production,
    • A. 

      Bioluminescent bacteria

    • B. 

      Predator bacteria

    • C. 

      Sheathed bacteria

    • D. 

      Prosthecate bacteria

  • 65. 
    Legionella live inside protected confines of protozoa
    • A. 

      Intra-protist replication

    • B. 

      Bioluminescent bacteria

    • C. 

      Sheathed bacteria

  • 66. 
    Facilitates nutrients acquisiton,
    • A. 

      Bacterial movement

    • B. 

      Storage granuels

  • 67. 
    Store nutreints
    • A. 

      Bacteria movement

    • B. 

      Storage granules

  • 68. 
    Extreme halophiles are found in hight salt environment
    • A. 

      True

    • B. 

      False

  • 69. 
    Extreme thermophiles are found in regions of volcanic and thermal vents as well as sulfurous fissures and hot springs
    • A. 

      False

    • B. 

      True

  • 70. 
    Which of them is true
    • A. 

      Methanothermus (methanogen) grows up to 97 degree C

    • B. 

      Pyrolobus fumarii (sulfur-reducer) grows between 90 degree C and 113 degree celcius

    • C. 

      Sulfolobus (sulfur oxidizer) grow> 50 degree C

    • D. 

      All of the above are correct

    • E. 

      Only A and C are correct