Microbiology Trivia Quiz On Microorganisms!

68 Questions | Total Attempts: 304

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Microbiology Trivia Quiz On Microorganisms! - Quiz

As we continue to cover every topic that is set out for us in the syllabus through quizzes that cover each chapter, we are now at chapter seven. In this chapter, we covered a lot on bacterial and archaeal cells. How much do you recall about the chapter? Take up the quiz below and get to find out. Good luck!


Questions and Answers
  • 1. 
    Most bacterial and archaeal cells divide by  
    • A. 

      Mitosis

    • B. 

      Meiosis

    • C. 

      Binary fission

    • D. 

      All of the above

  • 2. 
    All bacterial and archaeal cells are diploid.  
    • A. 

      True

    • B. 

      False

  • 3. 
    Which of the following is the correct order for binary fission?  
    • A. 

      A septum forms at midcell, the cell elongates, replicates its chromosome, and separates the chromosome into the two parts of the cell

    • B. 

      The cell elongates, a septum forms at midcell, the cell replicates its chromosome, and separates the chromosome into the two parts of the cell

    • C. 

      The cell elongates, replicates its chromosome, and separates the chromosome into the two parts of the cell, and a septum forms at midcell

    • D. 

      None of the above

  • 4. 
    The __________ is a group of proteins needed for DNA synthesis that assembles at the origin of replication.  
    • A. 

      Septum

    • B. 

      Replisome

    • C. 

      Prospore

    • D. 

      None of the above

  • 5. 
    The process of forming a cross wall between two daughter cells is known as  
    • A. 

      Replication

    • B. 

      Septation

    • C. 

      Sporulation

    • D. 

      Mitosis

  • 6. 
    The cell wall of bacteria constrains the ___________ _________ that results from the osmolarity of the cytoplasmic contents.  
  • 7. 
    The site at which replication of DNA starts in bacterial cells is known as the __________ of ___________. (answer, answer)  
  • 8. 
    The purpose of the penicillin binding proteins is to link phospholipids together in the cellular membrane.  
    • A. 

      True

    • B. 

      False

  • 9. 
    The actin-like protein that seems to be involved in determining cell shape is  
    • A. 

      MreB

    • B. 

      ActA

    • C. 

      SpnC

    • D. 

      FtsZ

  • 10. 
    During cytokinesis, a critical step in septation is the assembly of the  
    • A. 

      Replisome

    • B. 

      Spindle body

    • C. 

      Z ring

    • D. 

      Cytoskeletal spiral

  • 11. 
    The limitation on microbial growth rate at high nutrient levels is  
    • A. 

      The rate of protein synthesis

    • B. 

      The rate of DNA replication

    • C. 

      The saturation of the transport proteins for nutrient uptake.

    • D. 

      All of the choices

  • 12. 
    The total number of viable microorganisms remains constant in stationary phase because  
    • A. 

      There is a balance between cell division and cell death.

    • B. 

      There is a cessation of cell division even though the cells may remain metabolically active.

    • C. 

      Either there is a balance between cell division and cell death or there is a cessation of cell division even though the cells may remain metabolically active.

    • D. 

      None of the choices

  • 13. 
    Cells may enter stationary phase because of  
    • A. 

      The depletion of an essential nutrient

    • B. 

      A lack of available oxygen

    • C. 

      The accumulation of toxic waste products

    • D. 

      All of the choices

  • 14. 
    A culture in a closed vessel to which no additional medium is added and from which no waste products are removed is called a __________ culture.  
    • A. 

      Continuous

    • B. 

      Batch

    • C. 

      Fed-batch

    • D. 

      Semicontinuous

  • 15. 
    Given a log phase bacterial culture with 1 x 10^6 cells per ml and a generation time of 30 minutes, how long does it take the culture to reach a density of 6.4 x 10^7 cells per ml?    
    • A. 

      1 hour

    • B. 

      2 hours

    • C. 

      3 hours

    • D. 

      4 hours

  • 16. 
    Microorganisms are most nearly uniform in terms of chemical and physiological properties during __________ phase.  
    • A. 

      Lag

    • B. 

      Exponential

    • C. 

      Stationary

    • D. 

      Decline

  • 17. 
    Which of the following is a reason for the occurrence of a lag phase in a bacterial growth curve?  
    • A. 

      The cells may be old and depleted of ATP, essential cofactors, and ribosomes that must be synthesized before growth can begin.

    • B. 

      The medium may be different from the previous growth medium so that the cells must synthesize new enzymes to use different nutrients.

    • C. 

      The organisms may have been injured and require time to recover.

    • D. 

      All of these are potential reasons.

  • 18. 
    When a young, vigorously growing culture of bacteria is transferred to fresh medium of the same composition, the lag phase is usually short or absent.  
    • A. 

      True

    • B. 

      False

  • 19. 
    During the lag phase of microbial growth, the cells are metabolically inactive.  
    • A. 

      True

    • B. 

      False

  • 20. 
    The length of the lag phase of growth can vary depending on  
    • A. 

      The condition of the microorganisms

    • B. 

      The nature of the growth medium

    • C. 

      The temperature

    • D. 

      All of the choices

  • 21. 
    When a young, vigorously growing culture of bacteria is transferred to fresh medium of different composition, the lag phase is usually short or absent.  
    • A. 

      True

    • B. 

      False

  • 22. 
    The growth rate of a given species of microorganism is dependent on the composition of the medium in which it is grown.  
    • A. 

      True

    • B. 

      False

  • 23. 
    Microbial __________ is an increase in cell constituents that may or may not be accompanied by an increase in cell number.  
  • 24. 
    The __________ __________ is the length of time it takes for a population of microorganisms to double in number. (2 words)  
  • 25. 
    If all cell components are synthesized at constant rates relative to one another, the culture is said to be in __________ growth; however, if the rates of synthesis of some components change relative to the rates of synthesis of other components, the culture is said to be in __________ growth. (answer, answer)  
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