Functions and Structure of Bacterial Cell Walls
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Questions and Answers

What are the functions of the cell wall in prokaryotes? (Select all that apply)

  • Provides physical protection (correct)
  • Resistance to antibiotic (correct)
  • Provides attachment sites for bacteriophages (correct)
  • Prevents the cell from bursting in a hypotonic environment (correct)
  • Maintains the shape of the cell (correct)

    • The cell walls of Archaea contain peptidoglycan.

    False (B)

    What is the main component of most bacterial cell walls?

    Peptidoglycan

    Flashcards

    Bacterial cell wall

    A strong, rigid structure that surrounds the bacterial cell membrane, giving it shape.

    Peptidoglycan

    The primary component of most bacterial cell walls, composed of sugars and amino acids.

    Hypotonic environment

    A type of environment where the concentration of solutes outside the cell is lower than inside the cell. This causes water to move into the cell.

    Cell bursting prevention

    The ability of the bacterial cell wall to prevent the cell from bursting in a hypotonic environment.

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    Antibiotic resistance

    The cell wall can bind to certain types of antibiotics, reducing their effectiveness.

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    Bacteriophage attachment

    The bacterial cell wall can serve as attachment sites for bacteriophages, which are viruses that infect bacteria.

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    Physical protection

    The bacterial cell wall provides a barrier that protects the cell from the environment and external threats.

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    Archaea cell walls

    Archaea, a group of single-celled organisms, have cell walls that do not contain peptidoglycan.

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    Shape maintenance

    The cell wall plays a crucial role in maintaining the overall shape and integrity of bacteria.

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    Bacterial survival

    The cell wall is vital for the survival of bacteria, enabling them to thrive in various environments.

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    Study Notes

    Bacterial Cell Wall Functions

    • Prokaryotic cell walls perform several functions, including maintaining cell shape, offering physical protection, preventing cell lysis in hypotonic environments, providing resistance to antibiotics, and enabling bacteriophage attachment.

    Peptidoglycan Structure

    • Most bacterial cell walls contain peptidoglycan, a polymer of modified sugars cross-linked by short polypeptides.

    Archaea Cell Walls

    • Archaea cell walls lack peptidoglycan.

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    Description

    Explore the critical roles of bacterial and archaeal cell walls in this quiz. Learn about peptidoglycan structure and the mechanisms that protect and shape prokaryotic cells. Test your knowledge on how these features contribute to cell survival and resistance.

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