Bacterial Cell Wall Quiz
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Questions and Answers

What is the main component of bacterial cell wall?

  • Peptidoglycan (correct)
  • Teichoic acid
  • Mucopolysaccharide
  • Lipopolysaccharide
  • Which amino acid is present in the tetrapeptide of peptidoglycan?

  • D-isoglutamine (correct)
  • L-alanine
  • D-alanine
  • L-lysine
  • What is the function of teichoic acid in gram-positive bacteria?

  • To supply Mg+
  • To act as an antigenic determinant (correct)
  • To regulate cell division
  • To provide rigidity to the cell wall
  • What is the main difference between the cell walls of gram-positive and gram-negative bacteria?

    <p>Gram-negative bacteria have thinner peptidoglycan layer</p> Signup and view all the answers

    What is the function of Braun's lipoproteins in gram-negative bacteria?

    <p>To connect the outer membrane to peptidoglycan</p> Signup and view all the answers

    What is the function of periplasmic space in gram-positive bacteria?

    <p>To act as a storage space for nutrients</p> Signup and view all the answers

    What is the main component of the second membrane structure in gram-negative bacteria?

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

    What is the function of porin proteins in gram-negative bacteria?

    <p>To help bacteria adjust to osmolarity</p> Signup and view all the answers

    What is the function of TonB-dependent transports in gram-negative bacteria?

    <p>To bind nutrients with high affinity and deliver them into periplasm</p> Signup and view all the answers

    What is the effect of lysozymes on bacterial cells?

    <p>They break the bonds between NAG and NAM</p> Signup and view all the answers

    What is the effect of penicillin on bacterial cells?

    <p>They inhibit peptidoglycan synthesis</p> Signup and view all the answers

    Why are gram-negative bacteria naturally resistant to large peptidoglycan targeting antibiotics such as vancomycin?

    <p>Because they have thinner peptidoglycan layer</p> Signup and view all the answers

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    Description

    Test your knowledge on the bacterial cell wall with this quiz! Learn about the key components of a typical bacterial cell wall, including mucopolysaccharide peptidoglycan and the tetrapeptide structure. Discover how the cell wall provides rigidity through cross-linking and the differences between gram-positive and gram-negative cell walls. Challenge yourself with bonus questions on teichoic acid and other important aspects of the bacterial cell wall.

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