Microbiology: Prokaryotic & Eukaryotic Organisms, Bacterial Cell Structures
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Questions and Answers

What is the most common shape of bacteria?

  • Hexagonal
  • Cuboidal
  • Cylindrical
  • Spherical (correct)

    • Which bacterial species is responsible for causing cholera?

  • Treponema pallidum
  • Staphylococcus aureus
  • Vibrio cholerae (correct)
  • Escherichia coli

    • What is the function of teichoic acid in gram positive bacteria?

  • Antigenicity (correct)
  • Osmotic protection
  • Cell motility
  • Nutrient absorption

    • Which of the following is NOT a non-essential structure outside the bacterial cell wall?

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

    What is the primary chemical composition of the cell wall in gram negative bacteria?

    <p>Peptidoglycan and Lipopolysaccharides (LPS)</p> Signup and view all the answers

    What is the shape of Escherichia coli, a common bacterial species?

    <p>Straight rod (bacilli)</p> Signup and view all the answers

    What is the function of fimbriae (pili) in bacterial cells?

    <p>DNA transfer</p> Signup and view all the answers

    What differentiates the cell wall of mycoplasmas from other bacteria?

    <p>'No staining' reaction</p> Signup and view all the answers

    Which bacterial arrangement is exhibited by Neisseria gonorrhoeae?

    <p>'Pairs'</p> Signup and view all the answers

    'Pleomorphic' bacteria are those that:

    <p>'Are variable in shape'</p> Signup and view all the answers

    Which of the following is a characteristic of prokaryotic cells?

    <p>Replicate by mitosis</p> Signup and view all the answers

    What distinguishes eukaryotic cells from prokaryotic cells?

    <p>Replicate by budding</p> Signup and view all the answers

    Which of the following is a common feature of both prokaryotic and eukaryotic cells?

    <p>Contains peptidoglycan in cell wall</p> Signup and view all the answers

    Which type of bacteria is characterized by the presence of a nuclear membrane and multiple chromosomes?

    <p>Eukaryotic bacteria</p> Signup and view all the answers

    What is a distinguishing feature of Gram-negative bacterial cell wall?

    <p>Contains lipopolysaccharides</p> Signup and view all the answers

    Which major group does helminths belong to among the agents of human infectious diseases?

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

    What type of ribosomes are present in prokaryotic cells?

    <p>70S ribosomes</p> Signup and view all the answers

    'Microbiology' is the science that deals with which of the following?

    <p>Microbes that can be seen by the naked eye</p> Signup and view all the answers

    'Binary fission' is a form of replication used by which type of cells?

    <p>Prokaryotic cells</p> Signup and view all the answers

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