Gram-Negative Bacteria Practical Session
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Questions and Answers

What is the typical color of Pseudomonas aeruginosa colonies on agar plates?

  • Pink
  • Yellow
  • Green (correct)
  • Blue

    • Which test is used to confirm the colony of Neisseria?

  • Urease test
  • Oxidase test (correct)
  • Pyocyanin production test
  • Lactose fermentation test

    • What is the characteristic of Pseudomonas aeruginosa on MacConkey agar?

  • Yellow colony
  • Mucoid colony
  • Pink colony
  • Pale colony (correct)

    • Which of the following bacteria is a human opportunistic pathogen?

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

    Which of the following is NOT a characteristic of Pseudomonas aeruginosa?

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

    What is the characteristic of Proteus on nutrient agar and blood agar?

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

    What is the shape of G-ve bacilli under the microscope?

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

    What is the function of the oxidase test?

    <p>To detect cytochrome oxidase (D)</p> Signup and view all the answers

    Which of the following bacteria is a non-lactose fermenter?

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

    Which of the following bacteria produces a pink colony on MacConkey agar?

    <p>E. coli (A)</p> Signup and view all the answers

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