Microbiology By Body System Chapter 3

60 Questions | Total Attempts: 180

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Microbiology Quizzes & Trivia

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Questions and Answers
  • 1. 
    Using a microscope, you observe an amoeba moving toward a food source. This is an example of  
    • A. 

      Metabolism

    • B. 

      Cellular structure

    • C. 

      Responsiveness

    • D. 

      Growth

    • E. 

      Reproduction

  • 2. 
    Which of the following is NOT a component of bacterial flagella?  
    • A. 

      Hook

    • B. 

      Basal body

    • C. 

      Filament

    • D. 

      Flagellin

    • E. 

      Tubulin

  • 3. 
    Which of the following statements concerning the characteristics of life is FALSE?  
    • A. 

      Viruses have some, but not all, of the characteristics of living things.

    • B. 

      Organisms may not exhibit all of the characteristics of life at all times.

    • C. 

      Reproduction can occur asexually or sexually in living things.

    • D. 

      Reproduction is defined as an increase in the size of an organism.

    • E. 

      Living things store metabolic energy in the form of chemicals such as ATP.

  • 4. 
    Bacterial pili can be described as  
    • A. 

      Composed of tubulin

    • B. 

      Composed of peptidoglycan

    • C. 

      Solid, rigid protein structures.

    • D. 

      A means of locomotion.

    • E. 

      Specialized fimbriae.

  • 5. 
    Which of the following bacterial cell structures plays an important role in the creation of biofilms?  
    • A. 

      Glycocalyces

    • B. 

      Fimbrae

    • C. 

      Pili

    • D. 

      Flagella

    • E. 

      Both fimbrae and glycocalyces

  • 6. 
    Short, hairlike structures used only by eukaryotic cells for movement are called  
    • A. 

      Pili

    • B. 

      Flagella

    • C. 

      Fimbriae

    • D. 

      Cilia

    • E. 

      Pseudopodia

  • 7. 
    A bacterial cell moving toward light would be an example of  
    • A. 

      Positive phototaxis.

    • B. 

      Negative phototaxis.

    • C. 

      Positive chemotaxis.

    • D. 

      Negative chemootaxis.

    • E. 

      Tumbles

  • 8. 
    Which of the following statements concerning prokaryotic flagella is FALSE?  
    • A. 

      Treponema is an example of a bacterium that has an endoflagellum.

    • B. 

      Prokaryotic flagella are anchored to the cell wall by means of the basal body.

    • C. 

      A ʺrunʺ results from counterclockwise movement of the flagellum.

    • D. 

      Prokaryotic flagella are composed of tubulin.

    • E. 

      Prokaryotic flagella can rotate 360 degrees.

  • 9. 
    Which of the following statements concerning pili is FALSE?  
    • A. 

      A bacterial cell will usually have only one or two pili.

    • B. 

      Pili facilitate the transfer of DNA among bacterial cells

    • C. 

      Not all bacteria have pili.

    • D. 

      Pili are long, hollow tubules.

    • E. 

      Pili are longer than fimbriae and flagella.

  • 10. 
    Which of the following is NOT a component of bacterial cell walls?  
    • A. 

      Lipoteichoic acids

    • B. 

      Tubulin

    • C. 

      Peptidoglycan

    • D. 

      tetrapeptide

    • E. 

      Mycolic acid

  • 11. 
    Bacterial cell walls that are resistant to drying contain  
    • A. 

      Waxes

    • B. 

      Carbohydrates

    • C. 

      Amino acids

    • D. 

      Lipopolysaccharide

    • E. 

      Tubulin

  • 12. 
    Lipid A is also known as    
    • A. 

      Teichoic acid.

    • B. 

      Tetrapeptide.

    • C. 

      Endotoxin.

    • D. 

      Lipopolysaccharide.

    • E. 

      Mycolic acid.

  • 13. 
    Bacteria of the genus Mycoplasma are distinguished from other bacterial cells by
    • A. 

      Cell walls composed solely of amino acids.

    • B. 

      Unique ribosomes.

    • C. 

      the absence of a cytoplasmic membrane.

    • D. 

      The presence of mycolic acid in their cell walls.

    • E. 

      The absence of a cell wall.

  • 14. 
    Lipid-soluble molecules would be expected to cross the cytoplasmic membrane by which of the following processes?
    • A. 

      Facilitated diffusion

    • B. 

      Diffusion

    • C. 

      Osmosis

    • D. 

      Active transport

    • E. 

      Group translocation

  • 15. 
    ATP is expended in which of the following processes?
    • A. 

      Active transport

    • B. 

      Diffusion

    • C. 

      Facilitated diffusion

    • D. 

      Group atransloction

    • E. 

      Both active transport and group translocation

  • 16. 
    Which of the following statements concerning osmosis is FALSE?
    • A. 

      Osmosis stops when the system reaches equilibrium

    • B. 

      During osmosis, water crosses to the side of the membrane with a lower solute concentration.

    • C. 

      Osmosis requires a selectively permeable membrane

    • D. 

      Cells placed in hypotonic solutions will gain water

    • E. 

      Crenation results when cells are placed in a hypertonic solution.

  • 17. 
    Endospores survive a variety of harsh conditions in part because of the presence of
    • A. 

      Dipicolinic acid.

    • B. 

      Lipopolysaccharide.

    • C. 

      Mycolic acid.

    • D. 

      Hopanoids.

    • E. 

      Glycopteinsro.

  • 18. 
    The glycocalyx of a eukaryotic cell performs all of the following functions EXCEPT
    • A. 

      Transfer of genetic material between cells.

    • B. 

      Anchoring cells to each other.

    • C. 

      Protection against dehydration

    • D. 

      Strengthening the cell surface

    • E. 

      Cellular recognition and communication.

  • 19. 
    Which of the following is unique to archaea?
    • A. 

      LPS

    • B. 

      Peptidoglycan

    • C. 

      Fimbriae

    • D. 

      Pili

    • E. 

      Hami

  • 20. 
    When cells are placed in a hypertonic solution, they lose water and shrivel. This process is called
    • A. 

      Passive transport.

    • B. 

      Plasmalemma

    • C. 

      Crenation

    • D. 

      Endocytosis

    • E. 

      Periplasm

  • 21. 
    Which of the following statements concerning endocytosis and exocytosis is CORRECT?
    • A. 

      Waste products and secretions are exported from the cell during endocytosis.

    • B. 

      Phagocytosis is a type of endocytosis in which liquids are brought into the cell.

    • C. 

      These processes occur in both prokaryotes and eukaryotes.

    • D. 

      Endocytosis produces a structure called a food vesicle.

    • E. 

      Endocytosis is a form of passive transport, whereas exocytosis is a form of active transport.

  • 22. 
    One lipid found in eukaryotes but NOT in prokaryotes is
    • A. 

      Lipopolysaccharide

    • B. 

      Fatty acid

    • C. 

      Phospholipid

    • D. 

      Steroid

    • E. 

      Hopanoid

  • 23. 
    Which of the following statements concerning centrioles is FALSE?
    • A. 

      Centrioles are found in a region of the cell called the centrosome.

    • B. 

      Centrioles are believed to play a role in cellular processes such as mitosis and cytokinesis.

    • C. 

      Centrioles are composed of microtubules.

    • D. 

      The structure of centrioles is similar to that of eukaryotic flagella and cilia.

    • E. 

      Centrioles are found in all organisms except prokaryotes.

  • 24. 
    Which of the following is classified as a membranous organelle of eukaryotic cells?
    • A. 

      Centriole

    • B. 

      Endoplasmic reticulum

    • C. 

      Cytoskeleton

    • D. 

      Ribosome

    • E. 

      Both ribosomes and centrioles

  • 25. 
    Which of the following is NOT associated with the nucleus of a eukaryotic cell?
    • A. 

      Chromatin

    • B. 

      Histones

    • C. 

      Nucleolus

    • D. 

      Nucleoplasm

    • E. 

      Cristae

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