Microbial Growth Bacterial Cell Cycle Quiz
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Questions and Answers

What protein initiates chromosome replication in bacteria?

  • DnaA-ADP
  • DnaA-ATP (correct)
  • MinE
  • SeqA
  • How is initiation of chromosome replication inhibited?

  • SeqA prevents DnaA-ATP binding
  • MinCD spends more time at cell poles
  • DnaA-ATP binds to many sites leading to depletion (correct)
  • Increased expression of dnaA (repression)
  • What is the role of FtsZ ring in bacterial cell division?

  • Spatially controlling cell division (correct)
  • Inhibiting MinCD activity
  • Preventing peptidoglycan synthesis
  • Initiating chromosome replication
  • Which protein spends more time at cell poles, allowing FtsZ ring formation?

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

    What is the function of SeqA in the bacterial cell cycle?

    <p>Repressing dnaA expression</p> Signup and view all the answers

    Which component restricts FtsZ ring formation to the middle of the bacterial cell?

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

    What is responsible for providing structural integrity in bacterial cells?

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

    What is required to break existing bonds during peptidoglycan synthesis in bacterial growth?

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

    Which protein is involved in crosslinking peptides during peptidoglycan biosynthesis?

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

    Which system spatially controls the divisome defining the cell division plane in bacterial cells?

    <p>Min system</p> Signup and view all the answers

    What is required for initiating chromosome replication in bacterial cells?

    <p>DnaA-ATP</p> Signup and view all the answers

    Which second messenger is involved in biofilm formation?

    <p>Not mentioned in the text</p> Signup and view all the answers

    What is the typical state of bacteria in the environment?

    <p>Attached in biofilms</p> Signup and view all the answers

    Which organism does the Green Fluorescent Protein (GFP) originate from?

    <p>Aequorea Victoria</p> Signup and view all the answers

    What is the purpose of confocal scanning laser microscopy in studying biofilm formation?

    <p>To scan with a laser to excite fluorescent protein</p> Signup and view all the answers

    What intracellular signaling molecule controls biofilm formation?

    <p>c-di-GMP</p> Signup and view all the answers

    In what organism does quorum sensing result in increased c-di-GMP levels?

    <p>Pseudomonas aeruginosa</p> Signup and view all the answers

    How is biofilm formation dependent on a second messenger?

    <p>Via control of gene expression</p> Signup and view all the answers

    What is the primary target of antibiotics in microbial growth?

    <p>Protein synthesis</p> Signup and view all the answers

    How does efflux pump contribute to antibiotic resistance?

    <p>It transports antibiotics out of the cell</p> Signup and view all the answers

    Which mechanism of antibiotic resistance involves enzymes modifying the antibiotic structure?

    <p>Enzymatic inactivation</p> Signup and view all the answers

    What role does penicillin-binding protein (PBP) play in the context of antibiotics?

    <p>Weakens the cell wall</p> Signup and view all the answers

    Which process is impacted by spontaneous mutations leading to antibiotic resistance?

    <p>Targeted enzyme function</p> Signup and view all the answers

    What is the main characteristic of antibiotics according to the text?

    <p>Impact essential growth processes</p> Signup and view all the answers

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