Cell Structures and Bacterial Surface Layers Quiz
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Questions and Answers

Which bacterium mentioned in the text has a capsule primarily composed of a polypeptide?

  • Streptococcus mutans
  • Bacteroides fragilis
  • Klebsiella pneumoniae
  • Bacillus anthracis (correct)

    • What is the primary function of bacterial capsules?

  • Promote attachment of bacteria to surfaces (correct)
  • Protect against lysozyme
  • Store reserve carbohydrates and energy
  • Facilitate synthesis of ATP

    • What is the significance of bacterial capsules being relatively impermeable structures?

  • They store reserve energy
  • They facilitate bacterial movement
  • They prevent staining with dyes (correct)
  • They protect against lysozyme

    • What is one application of bacterial capsules mentioned in the text?

    <p>Preparation of vaccines</p> Signup and view all the answers

    Which bacterium's capsule can be toxic to host cells according to the text?

    <p>Bacteroides fragilis</p> Signup and view all the answers

    What type of polymer are bacterial capsules usually composed of?

    <p>Polysaccharides</p> Signup and view all the answers

    What is the function of plasmids in bacterial cells?

    <p>Encode antibiotic resistance</p> Signup and view all the answers

    Which of the following stressors can endospores resist?

    <p>Excessive heat</p> Signup and view all the answers

    What is the main composition of ribosomes in prokaryotic cells?

    <p>Proteins and ribosomal RNA</p> Signup and view all the answers

    Where are inclusions and granules found in bacterial cells?

    <p>Cytoplasm</p> Signup and view all the answers

    Why are plasmids important in genetic engineering?

    <p>They can be readily manipulated and transferred between cells</p> Signup and view all the answers

    Which bacterial structures can form a resistant dormant structure called an endospore?

    <p>Bacterial spores</p> Signup and view all the answers

    Where is the bacterial genome located?

    <p>Nucleoid</p> Signup and view all the answers

    What is the function of Mesosomes in bacterial cells?

    <p>Cell division</p> Signup and view all the answers

    What is the composition of bacterial cytoplasm?

    <p>80% Water, 20% Salts</p> Signup and view all the answers

    Which structure in bacterial cells contains the genetic information necessary for cell function?

    <p>Chromosome (Nucleoid)</p> Signup and view all the answers

    What process exhibits variation in the shape and size of individual cells?

    <p>Pleomorphism</p> Signup and view all the answers

    What is the function of Ribosomes in bacterial cells?

    <p>Protein synthesis</p> Signup and view all the answers

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