Bacteria Cell Structure and Functions
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Questions and Answers

Which field of microbiology specifically focuses on the study of viruses?

  • Mycology
  • Bacteriology
  • Virology (correct)
  • Parasitology
  • What is the characteristic shape of bacteria?

  • Spherical (correct)
  • Cubical
  • Star-shaped
  • Rectangular
  • Which type of microorganism uses pseudopods, flagella, or cilia for locomotion?

  • Fungi
  • Protozoa (correct)
  • Algae
  • Bacteria
  • What distinguishes archaea from bacteria?

    <p>Cell wall composition</p> Signup and view all the answers

    Which microorganism is capable of both sexual and asexual reproduction?

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

    Which field of microbiology is primarily focused on the immune system?

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

    Who was the first person to observe live microorganisms and describe them as 'animalcules'?

    <p>Antoni van Leeuwenhoek</p> Signup and view all the answers

    Which scientist is credited with the discovery that all living things are made of cells?

    <p>Robert Hooke</p> Signup and view all the answers

    Who were opponents of the idea of spontaneous generation, and demonstrated that a 'vital force' in the air is responsible for the survival of microorganisms?

    <p>Francesco Redi, John Needham, and Lazzaro Spallanzani</p> Signup and view all the answers

    Which theory challenged the idea of spontaneous generation by proposing that life only arises from pre-existing life?

    <p>Theory of Biogenesis</p> Signup and view all the answers

    What is the term used to describe the presence of organisms outside the body on water, food, and other biological substances?

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

    'Little boxes' or 'cells' as named by Robert Hooke formed the basis of which scientific theory?

    <p>Cell Theory</p> Signup and view all the answers

    What are the three categories that bacteria are organized into based on their structures?

    <p>Internal Structures, Cell Envelope, External Structures</p> Signup and view all the answers

    Which of the following is NOT an intracellular structure in bacteria?

    <p>Cell Membrane</p> Signup and view all the answers

    What is the main component of the gel-like matrix in bacterial cytoplasm?

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

    Which structure is responsible for excluding genetic material from the cytoplasm in bacteria?

    <p>Cell Membrane</p> Signup and view all the answers

    What is the function of storage granules in bacterial cytoplasm?

    <p>Genetic Material Storage</p> Signup and view all the answers

    Which external structure of bacteria is involved in movement?

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

    What is the main purpose of antiseptics?

    <p>To prevent the growth of microorganisms that could cause infections</p> Signup and view all the answers

    What is a common challenge in the selection of disinfectants?

    <p>Their effectiveness against specific groups of microbes</p> Signup and view all the answers

    What does the label on a disinfectant usually indicate?

    <p>The group of microbes it is effective against</p> Signup and view all the answers

    What distinguishes antiseptics from disinfectants?

    <p>Their application area</p> Signup and view all the answers

    Why might organic material present on an object interfere with the action of a disinfectant?

    <p>Prevent proper contact between the disinfectant and microorganisms</p> Signup and view all the answers

    In what situation might an antiseptic be used as a sanitizer?

    <p>For hand cleaning when washing hands is not possible</p> Signup and view all the answers

    What is the primary mechanism of action of moist heat in killing microorganisms?

    <p>Protein denaturation</p> Signup and view all the answers

    At what temperature and pressure does autoclaving effectively kill all vegetative cells and their endospores?

    <p>121°C at 15 psi</p> Signup and view all the answers

    What is the purpose of pasteurization in food processing?

    <p>To kill spoilage-causing microorganisms without affecting taste</p> Signup and view all the answers

    Which type of filters are commonly used in pasteurization processes?

    <p>Cellulose or nitrocellulose</p> Signup and view all the answers

    What is the purpose of using boiling or flowing steam in microbiology?

    <p>To kill vegetative bacteria, fungal pathogens, and most viruses</p> Signup and view all the answers

    Which type of equipment is preferred for the use of moist heat sterilization?

    <p>Dishes, basins, pitchers, and various equipment</p> Signup and view all the answers

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