Bacteria Surface Components Quiz
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Questions and Answers

Which type of bacteria has a multi-layered and more complex cell wall?

  • Gram-positive
  • Both gram-positive and gram-negative
  • Gram-negative (correct)
  • Neither gram-positive nor gram-negative
  • What is the main component of the cell wall in gram-positive bacteria?

  • Outer membrane
  • Teichoic acid
  • Lipopolysaccharide
  • Peptidoglycan (correct)
  • Which component is absent in the cell wall of gram-positive bacteria but present in gram-negative bacteria?

  • Periplasmic space
  • Lipoteichoic acid
  • Teichoic acid
  • Outer membrane (correct)
  • What holds enzymes and proteins in the periplasmic space of bacterial cell walls?

    <p>Fluid known as periplasm</p> Signup and view all the answers

    What mainly consists of 50-90% of the dry weight of the cell wall in gram-positive bacteria?

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

    What is the function of the bacterial cell wall?

    <p>Prevents the bursting of cells by maintaining their osmotic integrity</p> Signup and view all the answers

    What is the primary component of the bacterial cell wall responsible for maintaining shape, size, and rigidity?

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

    How does the bacterial cell wall aid in cell division?

    <p>By providing a primer for cell division and biosynthesis</p> Signup and view all the answers

    Which surface component of bacteria is responsible for locomotion?

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

    In what way does the bacterial cell wall contribute to protection of cells?

    <p>By preventing the bursting of cells by maintaining their osmotic integrity</p> Signup and view all the answers

    Which of the following is NOT a function of the bacterial cell wall?

    <p>Selectively permeable to molecules</p> Signup and view all the answers

    What is the primary component of the bacterial cell wall in gram-positive bacteria?

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

    Which surface component of bacteria is responsible for maintaining their osmotic integrity?

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

    In what way does the bacterial cell wall contribute to protection of cells?

    <p>By maintaining the microorganism's shape and rigidity</p> Signup and view all the answers

    Which type of bacteria has a multi-layered and more complex cell wall?

    <p>Gram-negative bacteria</p> Signup and view all the answers

    What is the function of lipoteichoic acid in bacterial cell walls?

    <p>It acts as a selective permeability barrier</p> Signup and view all the answers

    What is the main difference in the composition of peptidoglycan in gram-positive and gram-negative bacteria cell walls?

    <p>The peptide cross-bridges are bonded by 5 glycine amino acids in gram-negative bacteria and by direct peptide bonds in gram-positive bacteria</p> Signup and view all the answers

    Which component is present in the cell wall of gram-negative bacteria but absent in gram-positive bacteria?

    <p>Lipopolysaccharide (LPS)</p> Signup and view all the answers

    What is the primary function of the periplasmic space in bacterial cell walls?

    <p>To hold enzymes and proteins for biochemical reactions</p> Signup and view all the answers

    What mainly consists of 50-90% of the dry weight of the cell wall in gram-positive bacteria?

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

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