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 (B)</p> Signup and view all the answers

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

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

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

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

What is responsible for providing structural integrity in bacterial cells?

<p>Peptidoglycan (A)</p> Signup and view all the answers

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

<p>Autolysin (D)</p> Signup and view all the answers

Which protein is involved in crosslinking peptides during peptidoglycan biosynthesis?

<p>FtsI (D)</p> Signup and view all the answers

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

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

What is required for initiating chromosome replication in bacterial cells?

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

Which second messenger is involved in biofilm formation?

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

What is the typical state of bacteria in the environment?

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

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

<p>Aequorea Victoria (B)</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 (C)</p> Signup and view all the answers

What intracellular signaling molecule controls biofilm formation?

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

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

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

How is biofilm formation dependent on a second messenger?

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

What is the primary target of antibiotics in microbial growth?

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

How does efflux pump contribute to antibiotic resistance?

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

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

<p>Enzymatic inactivation (A)</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 (B)</p> Signup and view all the answers

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

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

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

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

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