Cytoplasmic Membrane Microbiology Quiz Questions

67 Questions | Total Attempts: 222

SettingsSettingsSettings
Please wait...
Cytoplasmic Membrane Microbiology Quiz Questions

Chapter 3 Microbiology


Questions and Answers
  • 1. 
    The concept of a prokaryote was first fully outlined in 1962 by  
    • A. 

      Watson and Crick

    • B. 

      Stanier and Van Niel

    • C. 

      Hersey and Chase

    • D. 

      Gilbert and Cech

  • 2. 
    The genus of bacteria that undergoes cell division in random planes, forming grapelike clusters of round bacteria, are the __________.  
  • 3. 
    Bacteria that do not have a fixed shape are said to be __________.  
  • 4. 
    A branched network of hyphae formed by the Actinomycetes is called a __________.  
  • 5. 
    Actinomycetes form long filaments called ___________.  
  • 6. 
    The term used to describe bacteria that are intermediate in shape between spherical and rod shaped is  
    • A. 

      Cocci

    • B. 

      Bacilli

    • C. 

      Vibrio

    • D. 

      Coccobacilli

  • 7. 
    Bacterial cells that are variable in shape are called  
    • A. 

      Vibrio

    • B. 

      Pleomophic

    • C. 

      Coccobacilli

    • D. 

      Hyphal

  • 8. 
    Square planar arrangement of cells that forms when round bacteria remain attached to each other during reproduction are called  
    • A. 

      Streptococci

    • B. 

      Staphylococci

    • C. 

      Tetrads

    • D. 

      Sarcinae

  • 9. 
    Flexible bacteria with a helical shape are called  
    • A. 

      Vibrios

    • B. 

      Spirilla

    • C. 

      Spirochetes

    • D. 

      Coccobacilli

  • 10. 
    Rigid bacteria with a helical cell shape are called  
    • A. 

      Vibrios

    • B. 

      Spirilla

    • C. 

      Spirochetes

    • D. 

      Coccobacilli

  • 11. 
    The term used to describe bacteria that are shaped like curved rods is  
    • A. 

      Coccus

    • B. 

      Bacillus

    • C. 

      Vibrio

    • D. 

      Coccobacillus

  • 12. 
    The term used to describe bacteria that are rod shaped is  
    • A. 

      Coccus

    • B. 

      Bacillus

    • C. 

      Vibrio

    • D. 

      Coccobacillus

  • 13. 
    The term used to describe bacteria that have a spherical shape is  
    • A. 

      Coccus

    • B. 

      Bacillus

    • C. 

      Vibrio

    • D. 

      Coccobacillus

  • 14. 
    Sterol-like molecules called hopanoids are thought to be important for the structural integrity of many bacteria because of their suspected role in membrane stabilization.  
    • A. 

      True

    • B. 

      False

  • 15. 
    The cytoplasmic membrane of bacteria  
    • A. 

      Retains the cytoplasm and its contents.

    • B. 

      Acts as a selectively permeable barrier, allowing some molecules to pass while preventing the movement of others.

    • C. 

      Is the major site of ATP synthesis in aerobes.

    • D. 

      All of the choices

  • 16. 
    The lipopolysaccharide (LPS) that is found in the outer membrane of gram-negative bacteria is also known as  
    • A. 

      Exotoxin

    • B. 

      Teichoic acid

    • C. 

      Murein

    • D. 

      Endotoxin

  • 17. 
    Which of the following is/are true of capsules?  
    • A. 

      They help bacteria escape phagocytosis by host cells.

    • B. 

      They retain water and help prevent desiccation of the bacteria.

    • C. 

      They prevent entry of many bacterial viruses.

    • D. 

      All of the choices

  • 18. 
    Proteins that are loosely associated with the cytoplasmic membrane are called __________ proteins.  
    • A. 

      Peripheral

    • B. 

      Integral

    • C. 

      External

    • D. 

      Internal

  • 19. 
    Proteins that are embedded within the cytoplasmic membrane and not easily extracted are called __________ proteins.  
    • A. 

      Peripheral

    • B. 

      Integral

    • C. 

      External

    • D. 

      Internal

  • 20. 
    Shrinkage of the plasma membrane away from the cell wall when the bacterium is placed in a hypertonic environment is called  
    • A. 

      Osmolysis.

    • B. 

      Plasmolysis

    • C. 

      Hydrolysis

    • D. 

      Hypertonolysis

  • 21. 
    Lipids with polar and nonpolar ends are said to be  
    • A. 

      Amphipathic

    • B. 

      Amphibolic

    • C. 

      Bilateral

    • D. 

      None of the choices

  • 22. 
    Although penicillin inhibits peptidoglycan synthesis, bacterial cells will continue to grow normally in the presence of penicillin in a(n) __________ environment.  
    • A. 

      Hypotonic

    • B. 

      Isotonic

    • C. 

      Hypertonic

    • D. 

      Nonpolar

  • 23. 
    All of the following statements about the periplasmic space are true except:  
    • A. 

      It is found only in gram-positive bacteria.

    • B. 

      It is located between the plasma membrane and outer membrane of gram-negative bacteria.

    • C. 

      T contains hydrolytic enzymes and binding proteins involved in nutrient acquisition.

    • D. 

      All of the above

  • 24. 
    Which of the following protects bacteria from lysis in dilute solutions and helps to determine their cellular morphology or shape?  
    • A. 

      Plasma membrane

    • B. 

      Peptidoglycan

    • C. 

      Capsule

    • D. 

      Gas vacuoles

  • 25. 
    Sortase is a protein enzyme of bacteria that  
    • A. 

      Plays a key role in directing proteins to the periplasm.

    • B. 

      Catalyzes covalent attachment of some surface proteins to peptidoglycan.

    • C. 

      Directs secretion of proteins across the outer membrane.

    • D. 

      Functions by transporting flagellum proteins to their extracellular site of assembly.

Back to Top Back to top