Bacterial Cell Structure and Function
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Questions and Answers

What is the function of plasmids in bacteria?

  • Form the cell wall structure
  • Resist being washed out by fluids
  • Carry out essential cellular functions
  • Encode accessory genes for improved virulence (correct)
  • How do bacteria attach to solid surfaces?

  • By forming lipid A
  • Through the cell wall structure
  • Using pili (correct)
  • Through replication of circular DNA
  • What is the main component of the Gram-negative cell wall?

  • Phospholipids
  • Peptidoglycan
  • Proteins
  • Lipopolysaccharide (correct)
  • In bacterial replication, what is responsible for maintaining the outer membrane?

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

    What function do pili serve in bacteria?

    <p>To mediate interactions with other cells</p> Signup and view all the answers

    What is the role of peptidoglycan in the bacterial cell wall?

    <p>Bind layers of peptinoglycan together</p> Signup and view all the answers

    What provides rigidity and shape to bacterial and archaeal cells?

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

    Which structure is important for bacterial cells to bind to specific receptors?

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

    In bacterial cells, what is the function of lipoteichoic acid?

    <p>Anchor peptidoglycan to the cytoplasmic membrane</p> Signup and view all the answers

    What is the function of Core-Connects Lipid A to polysaccharide 3.0 in bacterial cells?

    <p>Covers cell wall with immunologically distinct side chains</p> Signup and view all the answers

    What is the main purpose of the PMF (proton motive force) in bacterial cells?

    <p>To power the flagella motor</p> Signup and view all the answers

    Which component of the bacterial cell wall is responsible for forming a lattice structure with cross-linked peptides and sugar chains?

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

    What is the main function of plasmids in bacterial cells?

    <p>Allow bacterial replication</p> Signup and view all the answers

    What is the significance of fimbria in bacterial cells?

    <p>Attachment to bacteria</p> Signup and view all the answers

    What is the function of the Hook and Rod proteins in bacterial cells?

    <p>To act as a motor switch</p> Signup and view all the answers

    Which feature makes Gram-negative bacteria appear red or pink in a Gram stain?

    <p>Mot proteins</p> Signup and view all the answers

    What is the role of ethanolamine in bacterial flagella?

    <p>Pushes the filament in a single direction</p> Signup and view all the answers

    Why are Gram-positive bacteria harder to wash crystal violet from compared to Gram-negative bacteria in a Gram stain?

    <p>Their cell wall has pores that constrict solute leakage</p> Signup and view all the answers

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