Teichoic Acids in Gram-Positive Cell Walls
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Teichoic Acids in Gram-Positive Cell Walls

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Questions and Answers

What is the main function of teichoic acids in relation to ions?

  • To prevent the movement of all ions into the cell
  • To bind and regulate the movement of cations into and out of the cell (correct)
  • To regulate the movement of anions into the cell
  • To enhance the movement of potassium ions into the cell
  • What is the role of teichoic acids in cell growth?

  • To regulate cell division
  • To inhibit cell growth
  • To prevent cell death
  • To assume a role in cell growth (correct)
  • What is the main component of the Gram-negative cell wall?

  • Teichoic acid
  • Peptidoglycan (correct)
  • Lipoproteins
  • Outer membrane
  • Where is the peptidoglycan located in Gram-negative cell walls?

    <p>In the periplasm</p> Signup and view all the answers

    What is the function of teichoic acids in relation to the cell wall?

    <p>To provide antigenic specificity</p> Signup and view all the answers

    What is the main function of the periplasm in Gram-negative cell walls?

    <p>To house degradative enzymes and transport proteins</p> Signup and view all the answers

    What is the primary function of the cell wall in bacterial cells?

    <p>To prevent bacterial cells from rupturing due to osmotic pressure</p> Signup and view all the answers

    What is the chemical composition of the bacterial cell wall?

    <p>A macromolecular network called peptidoglycan</p> Signup and view all the answers

    What is the disaccharide portion of peptidoglycan composed of?

    <p>N-acetylglucosamine and N-acetylmuramic acid</p> Signup and view all the answers

    What is the function of peptidoglycan in the Gram-positive cell wall?

    <p>To create a thick and rigid structure</p> Signup and view all the answers

    What is attached to the disaccharide portion of peptidoglycan?

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

    What is the primary function of the capsule in pathogenic bacteria?

    <p>To protect from phagocytosis</p> Signup and view all the answers

    What is the role of peptidoglycan in the cell wall?

    <p>To maintain cell shape and structure</p> Signup and view all the answers

    What is the composition of the glycocalyx?

    <p>Polysaccharide, polypeptide, or both</p> Signup and view all the answers

    What is the term used to describe a glycocalyx that is firmly attached to the cell wall?

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

    What is the purpose of the hook and basal body in flagella?

    <p>To anchor the flagellum to the cell wall and plasma membrane</p> Signup and view all the answers

    What is the term used to describe a glycocalyx that is unorganized and loosely attached to the cell wall?

    <p>Slime layer</p> Signup and view all the answers

    How can the presence of a capsule be determined?

    <p>Using staining</p> Signup and view all the answers

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