A Microbiology Quiz For Learners! Trivia Questions

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Microbiology Quizzes & Trivia

Are you a microbiology student and are looking for some way to test out what you have understood in your classes so far? The quiz below is exactly what the doctor prescribed and will ensure that you have a smooth transition when it comes to sitting for your finals by showing you how questions are structured. Do give it a shot and all the best!


Questions and Answers
  • 1. 
    The scientific study of organisms with the ultimate goal of characterizing and arranging them in an orderly manner is  
    • A. 

      Taxonomy

    • B. 

      Classification

    • C. 

      Systematics

    • D. 

      Identification

  • 2. 
    The assignment of names to taxonomic groups is referred to as  
    • A. 

      Taxonomy

    • B. 

      Nomenclature

    • C. 

      Systematics

    • D. 

      Identification

  • 3. 
    The determination of the taxon to which an organism belongs is called  
    • A. 

      Taxonomy

    • B. 

      Classification

    • C. 

      Systematics

    • D. 

      Identification

  • 4. 
    The science dealing with classification is called  
    • A. 

      Taxonomy

    • B. 

      Nomenclature

    • C. 

      Systematics

    • D. 

      Identification

  • 5. 
    The arrangement of organisms into groups is best described as  
    • A. 

      Taxonomy

    • B. 

      Classification

    • C. 

      Systematics

    • D. 

      Identification

  • 6. 
     A classification system based on mutual similarity that involves comparing as many characteristics as possible is called a __________ system.  
    • A. 

      Phylogenetic

    • B. 

      Phyletic

    • C. 

      Phenetic

    • D. 

      Determinative systematic

  • 7. 
     A classification system based on evolutionary relationships is called a __________ system.  
    • A. 

      Phylogenetic

    • B. 

      Phenetic

    • C. 

      Systematic

    • D. 

      Determinative

  • 8. 
     Which of the following is useful in biological systematics?  
    • A. 

      Physiology

    • B. 

      Epidemiology

    • C. 

      Ecology

    • D. 

      All of the choices

  • 9. 
    A general term used to describe groups based on mutual similarity or evolutionary relatedness is  
    • A. 

      Class

    • B. 

      Taxa

    • C. 

      System

    • D. 

      Group

  • 10. 
    Microorganisms do not generally reproduce sexually; therefore, species are usually defined by phenotypic and genotypic similarities.  
    • A. 

      True

    • B. 

      False

  • 11. 
    In an approach called __________ taxonomy, relatedness is determined by a wide range of phenotypic and genotypic information.  
  • 12. 
    A population descending from a single organism or pure culture isolate is called a  
    • A. 

      Genus

    • B. 

      Species

    • C. 

      Subspecies

    • D. 

      Strain

  • 13. 
    Which of the following is an example of the use of the binomial system devised by Linnaeus?  
    • A. 

      Escherichia coli

    • B. 

      Enterobacteriaceae

    • C. 

      Enterobacteriales

    • D. 

      O157:H7

  • 14. 
    The organisms in which of the following are more closely related?  
    • A. 

      Order

    • B. 

      Family

    • C. 

      Class

    • D. 

      Phylum

  • 15. 
    The binomial system of nomenclature assigns each organism a scientific name consisting of  
    • A. 

      Species and strain.

    • B. 

      Kingdom and species.

    • C. 

      Genus and species.

    • D. 

      Kingdom and genus.

  • 16. 
    Serovars are strains of a species that have distinctive antigenic properties.  
    • A. 

      True

    • B. 

      False

  • 17. 
    Microbial species are collections of strains that share many stable properties in common but differ significantly from other strains.  
    • A. 

      True

    • B. 

      False

  • 18. 
     The type strain is a well-characterized strain to which other strains are compared for inclusion in or exclusion from a particular species.  
    • A. 

      True

    • B. 

      False

  • 19. 
     The type strain is the most representative strain of a particular species.  
    • A. 

      True

    • B. 

      False

  • 20. 
    Bacterial strains that are characterized by biochemical differences are called __________.  
  • 21. 
     Bacterial strains that have distinct antigenic properties are called __________.  
  • 22. 
    The general order of classification below the domain or kingdom level is  
    • A. 

       phyla, order, class, family, genus, species.

    • B. 

       phyla, order, family, class, genus, species.

    • C. 

       phyla, class, family, order, genus, species.


    • D. 

      Phyla, class, order, family, genus, species.

  • 23. 
    Mole percent (G+C) of DNA is useful for determining relatedness at the __________ level.  
    • A. 

      Kingdom

    • B. 

      Class

    • C. 

      Genus

    • D. 

      None of the choices

  • 24. 
    Stable annealing due to hydrogen bonding between DNAs of similar nucleotide sequence from different organisms is referred to as  
    • A. 

      Hydrolysis

    • B. 

      Restriction

    • C. 

      Hybridization

    • D. 

      Ligation

  • 25. 
    The temperature at which half of the strands of a double-stranded DNA molecule have separated from each other is called the __________ temperature.  
    • A. 

      Separation

    • B. 

      Melting

    • C. 

      Destabilizing

    • D. 

      Mobilization

  • 26. 
    • A. 

      Organisms with similar G + C percentages have similar base sequences.

    • B. 

      Organisms with different G + C percentages have dissimilar base sequences.

    • C. 

      Similar G + C percentages only suggests relatedness if the two organisms are also alike phenotypically. 


    • D. 

      All of these are true about the G + C percentages of organisms.

  • 27. 
    Conserved indels are  
    • A. 

      a type of transposable sequence characteristic of particular genus and useful for taxonomic analysis

    • B. 

      sequences in eukaryotic mRNAs that are removed by RNA splicing

    • C. 

      a type of signature sequence particularly useful for phylogenetic analysis 


    • D. 

      Sequences of protein coding genes that are found altered in related species due to their tendency to accumulate small deletions

  • 28. 
    The analysis of genetic relatedness by observing the DNA fragmentation patterns resulting from restriction endonuclease cleavage is referred to as  
    • A. 

      Genetic fingerprinting

    • B. 

      Genetic patterning.

    • C. 

      Genetic restriction.

    • D. 

      None of the choices

  • 29. 
     rRNA signature sequences can be used to place microorganisms in the correct domain.  
    • A. 

      True

    • B. 

      False

  • 30. 
    The G + C content of a DNA sample can be estimated from its TM of a DNA.  
    • A. 

      True

    • B. 

      False

  • 31. 
    Conjugation is useful for determining relatedness between bacteria at the species level because it never occurs between organisms of different genera.  
    • A. 

      True

    • B. 

      False

  • 32. 
    Phylogenetic trees are usually constructed using either a distance-based ___________ approach, or a characteristic _________ approach.  (answer, answer)  
  • 33. 
    An unrooted tree containing four unrelated species can become rooted by adding  
    • A. 

      A descendant group related to two of the species

    • B. 

      An unrelated outgroup 


    • C. 

      A distantly related outgroup

    • D. 

      A descendant related to only one of the species

  • 34. 
     Phylogenetic trees show inferred evolutionary relationships in the form of multiple branching lineages connected by nodes.    
    • A. 

      True

    • B. 

      False

  • 35. 
    Transformation is not useful in determining relatedness between two organisms because it frequently crosses genera.  
    • A. 

      True

    • B. 

      False

  • 36. 
    The _____________ hypothesis proposes that mitochondria and chloroplasts developed from free-living prokaryotes that invaded a precursor to the eukaryotes and established a stable relationship.  
  • 37. 
    Chromosomal gene exchange is not useful in classification studies because prokaryotes do not reproduce sexually.  
    • A. 

      True

    • B. 

      False

  • 38. 
     Extensive horizontal gene transfer between domains greatly simplifies the construction of phylogenetic trees.  
    • A. 

      True

    • B. 

      False

  • 39. 
     Numerical taxonomy was made practical with the advent of  
    • A. 

      The compound microscope.


    • B. 

      The electron microscope.

    • C. 

      Computers

    • D. 

      Nucleotide sequencing.

  • 40. 
    Small, random genetic changes that occur over generations is known as  
    • A. 

      Microgenesis

    • B. 

      Progenesis

    • C. 

      Degenesis

    • D. 

      Anagenesis

  • 41. 
     According to genome analysis, a member of the genus ______________is most closely related to the mitochondrion.  
    • A. 

      Escherichia

    • B. 

      Agrobacterium

    • C. 

      Prochloron

    • D. 

      Rickettsia

  • 42. 
    According to the endosymbiosis hypothesis  
    • A. 

      The first endosymbiotic event involved an anaerobic bacterium. 


    • B. 

      The first endosymbiont was a fermentative organism.

    • C. 

        the mitochondrion evolved from the same endosymbiont as the hydrogenosome.

    • D. 

      All of the choices

  • 43. 
    The ancestors of modern _______________ performed the oxygenic photosynthesis responsible for converting our anoxic planet to an oxygenated one.  
    • A. 

      Crenarchaeota

    • B. 

      Proteobacteria

    • C. 

      Firmicutes

    • D. 

      Cyanobacteria

  • 44. 
     A theoretical concept that is used to understand how and why certain organisms can be sorted into discrete taxonomic groups is known as the  
    • A. 

      Endosymbiotic theory.

    • B. 

      Species concept.

    • C. 

      Phylogenetic concept. 


    • D. 

      Genotypic concept.

  • 45. 
    The pace of evolution does not always occur at a constant rate but is periodically interrupted by rapid bursts of speciation; this is known as _________ ________.  (2 words)  
  • 46. 
    Numerical taxonomy is based primarily on the percent DNA sequence homology.  
    • A. 

      True

    • B. 

      False

  • 47. 
     Which of the following is true about Bergey's Manual?  
    • A. 

      The first edition is mostly phenetic while the second edition is more phylogenetic. 


    • B. 

      The first edition is largely phylogenetic while the second edition is more phenetic.

    • C. 

        The first and second editions are both largely phenetic. 


    • D. 

      The first and second editions are both largely phylogenetic.

  • 48. 
     Although there are other classification schemes for prokaryotes, the one used in Bergey's Manual is currently considered by most microbiologists to be the most .  
    • A. 

      True

    • B. 

      False

  • 49. 
    The second edition of Bergey's Manual classifies bacteria  
    • A. 

      Phylogenetically

    • B. 

      Phonetically

    • C. 

      Numerically

    • D. 

      None of the choices

  • 50. 
    The second edition of Bergey's manual groups pathogenic species together rather than in phylogenetic groups.  
    • A. 

      True

    • B. 

      False