Bacterial Cell Wall Synthesis Inhibition Quiz
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Questions and Answers

What characteristic distinguishes teicoplanin from vancomycin?

  • Steric shield formation
  • Oxidative couplings
  • Dimerisation
  • Alkyl chain anchoring to the cell membrane (correct)

Which process does not contribute to the biosynthesis of vancomycin?

  • Ester link formation (correct)
  • Glycosidation
  • Chlorination
  • Hydroxylation

What leads to resistance in vancomycin due to mutation?

  • Oxidative couplings in the hexapeptide
  • Dimerisation of the molecule
  • Replacement of D-alanine by D-lactate (correct)
  • Formation of a steric shield

What distinguishes oritavancin from eremomycin?

<p>Presence of a hydrophobic tail (A)</p> Signup and view all the answers

Which characteristic is not true for telavancin analogues?

<p>Derived from a flexible hexapeptide (B)</p> Signup and view all the answers

What distinguishes eremomycin from vancomycin?

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

What is the mechanism of action of cycloserine in inhibiting bacterial cell wall synthesis?

<p>Inhibition of phosphoenolpyruvate transferase (B)</p> Signup and view all the answers

How does vancomycin inhibit bacterial cell wall synthesis?

<p>Inhibition of transeptidase (D)</p> Signup and view all the answers

Which enzyme is inhibited by phosphomycine in the process of bacterial cell wall synthesis?

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

What is the role of bacitracin in inhibiting bacterial cell wall synthesis?

<p>Inhibition of phosphatase (C)</p> Signup and view all the answers

Which phase of bacterial cell wall synthesis does teicoplanin target for inhibition?

<p>II° phase: Inhibition of peptidoglycan synthetase (A)</p> Signup and view all the answers

What is the mechanism by which cycloserine inhibits bacterial cell wall synthesis?

<p>Acts within the cytoplasm and inhibits L-alanine racemase and D-Ala-D-Ala ligase (C)</p> Signup and view all the answers

Flashcards

Teicoplanin vs. Vancomycin difference

Teicoplanin differs from vancomycin due to an alkyl chain anchoring to the cell membrane.

Vancomycin biosynthesis step missing

Ester link formation is not part of vancomycin's biosynthesis process.

Vancomycin resistance mutation

Resistance arises from replacing D-alanine with D-lactate in vancomycin.

Oritavancin vs. Eremomycin difference

Oritavancin has a hydrophobic tail, unlike eremomycin.

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Telavancin analogue FALSE characteristic

Telavancin analogues are not derived from a flexible hexapeptide.

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Eremomycin vs. Vancomycin: Key difference

Eremomycin is a naturally occurring glycopeptide, unlike vancomycin.

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Cycloserine's cell wall inhibition mechanism

Cycloserine stops bacterial cell wall synthesis by hindering phosphoenolpyruvate transferase.

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Vancomycin's cell wall inhibition mechanism

Vancomycin inhibits bacterial cell wall synthesis by blocking transeptidase.

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Phosphomycine inhibited enzyme

Phosphomycine inhibits the phosphoenolpyruvate transferase enzyme in bacterial cell wall synthesis.

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Bacitracin's cell wall inhibition role

Bacitracin inhibits phosphatase, impacting bacterial cell wall synthesis.

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Teicoplanin's target phase in bacterial cell wall

Teicoplanin inhibits peptidoglycan synthetase in the II° phase of bacterial cell wall synthesis.

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Cycloserine's mechanism of action

Cycloserine acts within the cytoplasm to inhibit L-alanine racemase and D-Ala-D-Ala ligase.

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