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GCSE Biology Paper 1 (9-1 Exams)

Petri Sterilised Dish Steps Needed Prepare Uncontamined Culture

To ensure an uncontaminated culture, sterilize Petri dishes and the culture medium, sterilize the inoculating loop by heating it, tape the Petri dish lid, and store the dish upside down.

To prepare an uncontaminated culture, sterilize Petri dishes and culture medium, sterilize the inoculating loop with a flame, tape the Petri dish lid lightly, and store the dish upside down.

Front What are the steps needed to prepare an uncontamined culture?
Back
  • The Petri dishes and culture medium must be sterilised before use
  • The innoculating loop should be sterilised by passing through a hot flame
  • The lip of the Petri dish should be lighly taped on
  • The Petri dish should be stored upside down

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