Microbiology Culture Media and History Quiz
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Questions and Answers

What is a colony in microbiology?

  • A group of bacteria with different origins
  • A visible collection of millions of bacteria from a single bacterial cell (correct)
  • A single bacterial cell
  • A type of bacteria

    • Who discovered agar as a solidifying agent in culture media?

  • Frau Hesse (correct)
  • Robert Koch
  • Louis Pasteur
  • Alexander Fleming

    • Why is gelatin not considered satisfactory for use in culture media?

  • It has a high melting point
  • It is bacteriologically inert
  • It liquefies at 24ºC (correct)
  • It does not liquefy at 24ºC

    • What is the purpose of synthetic or defined media in microbiology?

    <p>To provide trace elements and vitamins required by microorganisms</p> Signup and view all the answers

    Which of the following is often used as an inorganic nitrogen source in culture media?

    <p>Ammonium salts</p> Signup and view all the answers

    What is the main purpose of using liquid (broth) culture media?

    <p>To promote profuse growth</p> Signup and view all the answers

    What is the purpose of an autoclave in a laboratory setting?

    <p>To sterilize equipment and objects by using steam</p> Signup and view all the answers

    How does an autoclave work to achieve sterilization?

    <p>By maintaining a high pressure and allowing steam to enter</p> Signup and view all the answers

    What is the function of an incubator in a microbiology laboratory?

    <p>To maintain optimal conditions for growing microbiological cultures</p> Signup and view all the answers

    Why might a microwave be used in a microbiology laboratory for media preparation?

    <p>To save time and ensure media quality</p> Signup and view all the answers

    What is the purpose of a laminar flow hood in a laboratory setting?

    <p>To bathe the work area with positive pressure HEPA-filtered air</p> Signup and view all the answers

    How can a refrigerator be utilized in a laboratory?

    <p>To preserve certain chemical reagents or media</p> Signup and view all the answers

    Which specialized tool is commonly used for spreading bacteria in the plate?

    <p>L-Shape Glass Rods</p> Signup and view all the answers

    What is the main purpose of using an Inoculating Needle?

    <p>To determine the shape of the hole digested by bacteria</p> Signup and view all the answers

    Which specialized tool is NOT recommended for culturing bacteria due to its wide mouth?

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

    What is the function of Mechanical Pipettes?

    <p>To extract or deliver small amounts of liquid</p> Signup and view all the answers

    Which specialized tool is used for incineration to avoid contaminants?

    <p>Alcohol Lamp</p> Signup and view all the answers

    For what purpose would you use a Cotton Swab instead of an Inoculating Loop?

    <p>During sampling</p> Signup and view all the answers

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