Bacterial Cell Wall Structure Quiz
30 Questions
1 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

Why does peptidoglycan act as the rigid layer of the cell envelope?

  • To confer cell shape (correct)
  • To assist in protein synthesis
  • To help with DNA replication
  • To regulate cell metabolism
  • Which antibiotic inhibits the biosynthesis of peptidoglycan?

  • Erythromycin
  • Penicillin (correct)
  • Vancomycin
  • Tetracycline
  • What is the function of lysozyme in relation to peptidoglycan?

  • Synthesis of peptidoglycan
  • Degrading the glycan chain (correct)
  • Preventing osmotic shock
  • Increasing cell wall rigidity
  • Which enzyme is involved in crosslinking the peptidoglycan layer?

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

    In which bacterial envelope layer is peptidoglycan mainly found?

    <p>Gram-positive cell envelope</p> Signup and view all the answers

    What is the role of peptidoglycan during transverse binary fission?

    <p>Forming a septum at the cell midpoint</p> Signup and view all the answers

    What is the primary mode of reproduction for a vast majority of prokaryotes?

    <p>Transverse binary fission</p> Signup and view all the answers

    Which term describes the morphology of bacteria that are cylindrical rods?

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

    In terms of their relationship with molecular oxygen, prokaryotes can be classified as...

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

    Which shape is characteristic of spirochete bacteria?

    <p>Flexible helical rod</p> Signup and view all the answers

    What is the term used to describe bacterial morphology that is filamentous?

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

    Which type of bacteria primarily exhibit budding as a form of reproduction?

    <p>Streptomyces spp.</p> Signup and view all the answers

    What is the primary composition of pili in bacteria?

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

    In Gram-positive bacteria, what type of acids can be found in the thick peptidoglycan layer?

    <p>Teichoic and lipoteichoic acids</p> Signup and view all the answers

    What component is present in the outer membrane of Gram-negative bacteria?

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

    Which structure is exclusive to the cell wall of Gram-positive bacteria?

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

    What does the decolorizer do during Gram staining of bacteria?

    <p>Dissolves the Gram-negative outer membrane</p> Signup and view all the answers

    Which bacterium would most likely have a thin peptidoglycan layer?

    <p>Escherichia coli (Gram-negative)</p> Signup and view all the answers

    What is a defining characteristic of bacterial cell ultrastructure based on the text?

    <p>Rigid cell wall composed of peptidoglycan</p> Signup and view all the answers

    Which statement accurately contrasts prokaryotic and eukaryotic cell ultrastructure?

    <p>Prokaryotic cells lack a true nucleus, unlike eukaryotic cells.</p> Signup and view all the answers

    What is the size range of bacteria as mentioned in the text?

    <p>1-10 µm</p> Signup and view all the answers

    Which type of antibiotics are used as a model to relate macromolecular biosynthesis to antibacterial drug mechanisms of action according to the text?

    <p>$eta$-lactam antibiotics</p> Signup and view all the answers

    What is a key feature of bacterial cell organization highlighted in the text?

    <p>Simplicity in cell organization</p> Signup and view all the answers

    Which bacterial species is mentioned as an exception with regard to possessing a rigid cell wall composed of peptidoglycan?

    <p>$ extit{Mycoplasma}$ spp.</p> Signup and view all the answers

    Penicillin functions as a competitive inhibitor of transpeptidase because it is a structural analog of which compound?

    <p>D-alanyl-D-alanine</p> Signup and view all the answers

    Which antibiotic class targets the cross-linking of peptidoglycan, leading to inhibition of bacterial cell wall synthesis?

    <p>β-lactam antibiotics</p> Signup and view all the answers

    Teichoic acids in gram-positive bacteria are primarily involved in:

    <p>Maintaining cell shape</p> Signup and view all the answers

    The major region of lipopolysaccharide responsible for endotoxin activity is known as:

    <p>Lipid A</p> Signup and view all the answers

    Which component of lipoteichoic acids contributes to the somatic (O) serotype antigenicity of gram-positive organisms?

    <p>Various sugars and amino acids</p> Signup and view all the answers

    The action of lysozyme primarily targets the linkage between which components in bacterial cell walls?

    <p>Polysaccharide chains and peptide bridges</p> Signup and view all the answers

    More Like This

    Bacterial Cell Wall Structure Quiz
    10 questions
    Bacterial Cell Wall Structure
    18 questions
    Bacterial Cell Wall Types Quiz
    34 questions
    Use Quizgecko on...
    Browser
    Browser