Test Your Microbial Knowledge
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Questions and Answers

Which of the following is the purpose of leaving the petri dishes in the laboratory for 3-4 days?

  • To expose petri dish K to air for 10-15 minutes
  • To observe the development of microorganisms in each petri dish (correct)
  • To label the petri dishes with culture medium
  • To put a few drops of pond water in petri dish L

    • Which petri dish serves as the control in this experiment?

  • Petri dish N
  • Petri dish M
  • Petri dish L
  • Petri dish O (correct)

    • What should be recorded about the colonies of microorganisms in each petri dish?

  • Number of colonies in each petri dish
  • Size of the colonies in each petri dish
  • Type of water used in each petri dish
  • Colour, pattern of growth, appearance (correct)

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