Microbial Growth Bacterial Cell Cycle Quiz

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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?

MinE Signup and view all the answers

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

Repressing dnaA expression Signup and view all the answers

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

MinCD proteins Signup and view all the answers

What is responsible for providing structural integrity in bacterial cells?

Peptidoglycan Signup and view all the answers

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

Autolysin Signup and view all the answers

Which protein is involved in crosslinking peptides during peptidoglycan biosynthesis?

FtsI Signup and view all the answers

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

Min system Signup and view all the answers

What is required for initiating chromosome replication in bacterial cells?

DnaA-ATP Signup and view all the answers

Which second messenger is involved in biofilm formation?

Not mentioned in the text Signup and view all the answers

What is the typical state of bacteria in the environment?

Attached in biofilms Signup and view all the answers

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

Aequorea Victoria Signup and view all the answers

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

To scan with a laser to excite fluorescent protein Signup and view all the answers

What intracellular signaling molecule controls biofilm formation?

c-di-GMP Signup and view all the answers

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

Pseudomonas aeruginosa Signup and view all the answers

How is biofilm formation dependent on a second messenger?

Via control of gene expression Signup and view all the answers

What is the primary target of antibiotics in microbial growth?

Protein synthesis Signup and view all the answers

How does efflux pump contribute to antibiotic resistance?

It transports antibiotics out of the cell Signup and view all the answers

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

Enzymatic inactivation Signup and view all the answers

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

Weakens the cell wall Signup and view all the answers

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

Targeted enzyme function Signup and view all the answers

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

Impact essential growth processes Signup and view all the answers