Microbiology Quiz: Bacteria, Eukaryotic Organisms, and Skin Lesion Examination
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Questions and Answers

What kind of organisms are small nucleated eukaryotic unicellular organisms multiplying by budding?

  • Fungi (correct)
  • Bacteria
  • Viruses
  • Algae
  • Which of the following is NOT a characteristic of bacteria?

  • Genetic information is coded by the DNA
  • 70S ribosomes conduct protein synthesis
  • Energy is generated in mitochondria (correct)
  • Mitosis is a way of multiplication
  • A Gram stained smear from a skin lesion shows Gram positive cocci arranged in grapes-like clusters. Which microorganism is MOST probably isolated?

  • Staphylococcus aureus (correct)
  • Streptococcus pyogenes
  • Escherichia coli
  • Bacillus anthracis
  • What kind of organisms are most probably found in a sputum smear in a pneumonia case, where diplococci with pointed ends, arranged in pairs, are observed?

    <p>Neisseria meningitidis</p> Signup and view all the answers

    How many stages does the Gram-staining procedure consist of?

    <p>3</p> Signup and view all the answers

    Which of the following structures is NOT a universal entity for all Eukaryotes?

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

    What kind of microorganisms was found in the oropharyngeal swabs of the patient with angina?

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

    Which one of the statements is the MOST accurate comparison of human and bacterial cells?

    <p>Human cells have a cell wall containing murein, bacterial cell wall contains peptidoglycan</p> Signup and view all the answers

    According to Gram-staining procedure, all bacteria can be broadly divided into what basic groups?

    <p>Gram positive and Gram negative</p> Signup and view all the answers

    Which bacterial surface structure is responsible for adherence to the eukaryotic cell surface?

    <p>Common-pili</p> Signup and view all the answers

    Obligatory structures of bacterial cell are:

    <p>Nucleoid, cytoplasm, cell wall</p> Signup and view all the answers

    Each of the following statements concerning the Gram stain is correct EXCEPT:

    <p>Streptococcus pyogenes stains dark purple because it has a thick peptidoglycan layer and teichoic acids</p> Signup and view all the answers

    The lysozyme hydrolyzes the linkage between N-acetylmuramic acid and N-acetyl glucosamine causing:

    <p>The cell to become osmotically-fragile</p> Signup and view all the answers

    Which component of Gram-negatives LPS is responsible for toxic properties of endotoxin?

    <p>Lipid A</p> Signup and view all the answers

    Which of the following statements about bacterial cell wall is TRUE?

    <p>Gracilicutes cell wall contains teichoic and lipoteichoic acids</p> Signup and view all the answers

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