Control Of Microorganisms: Antibiotics Quiz
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Questions and Answers

Which type of antibiotics are used to limit the growth and reproduction of bacteria?

  • Broad-spectrum antibiotics
  • Bacteriostatic antibiotics (correct)
  • Antifungal antibiotics
  • Bactericidal antibiotics

    • What is the function of sulphonamides in bacterial cells?

  • They act as competitive antagonists of PABA in folic acid synthesis (correct)
  • They inhibit protein synthesis in bacteria
  • They target the cell wall of bacteria
  • They disrupt the DNA replication process in bacteria

    • In Kirby–Bauer antibiotic testing, what does it mean when a bacterial strain is classified as 'resistant'?

  • The bacteria show some sensitivity to the antibiotic
  • The bacteria are not affected by the antibiotic (correct)
  • The bacteria mutate rapidly in response to the antibiotic
  • The bacteria are killed by the antibiotic

    • Which microbial sources can produce antibiotics?

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

    What is the role of the CLSI in antibiotic testing?

    <p>To standardize culture and sensitivity testing methods</p> Signup and view all the answers

    Which type of antibiotics require a bacterial strain to be inhibited for their effectiveness?

    <p>Bacteriostatic antibiotics</p> Signup and view all the answers

    What role does folic acid play in bacterial DNA production?

    <p>Folic acid is a precursor molecule for DNA production</p> Signup and view all the answers

    What characterizes an 'Intermediate' bacterial strain in terms of antibiotic sensitivity?

    <p>'Intermediate' strains are moderately susceptible to the antibiotic</p> Signup and view all the answers

    Which of the following is true regarding the mechanism of action of aminoglycosides?

    <p>They inhibit protein synthesis by binding to the 30S ribosomal subunit.</p> Signup and view all the answers

    Which of the following statements about quinolones is correct?

    <p>They target bacterial DNA gyrase and topoisomerase IV, inhibiting DNA replication.</p> Signup and view all the answers

    What is the primary mechanism of action of sulfonamides?

    <p>They are competitive inhibitors of $p$-aminobenzoic acid (PABA) in folic acid synthesis.</p> Signup and view all the answers

    Which of the following statements about the Kirby-Bauer antibiotic testing method is correct?

    <p>It measures the diameter of the zone of inhibition around an antibiotic-impregnated disk to determine susceptibility.</p> Signup and view all the answers

    Which of the following statements about bacteriostatic antibiotics is correct?

    <p>They inhibit bacterial growth and replication but do not kill the bacteria.</p> Signup and view all the answers

    Which of the following is a common mechanism of antibiotic resistance in bacteria?

    <p>All of the above.</p> Signup and view all the answers

    Which of the following statements about antibiotic resistance is correct?

    <p>Antibiotic resistance can spread between different bacterial species through horizontal gene transfer.</p> Signup and view all the answers

    What is the primary function of the Clinical and Laboratory Standards Institute (CLSI)?

    <p>To develop and publish guidelines for antibiotic susceptibility testing and interpretation.</p> Signup and view all the answers

    Which of the following statements about macrolide antibiotics is correct?

    <p>They inhibit bacterial protein synthesis by binding to the 50S ribosomal subunit.</p> Signup and view all the answers

    Which of the following is a possible consequence of inappropriate or overuse of antibiotics?

    <p>All of the above.</p> Signup and view all the answers

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