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WJEC Biology GCSE > Microrganisms and their application (NEW) > Flashcards

Microrganisms and their application (NEW) Flashcards

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1
Q

What is aseptic technique?

A
  • lids secured with tape
  • sterilisation of agar
  • flame mouth of test tube
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2
Q

How do you control bacterial growth?

A

Room temperature- Bacterial growth is uncontrolled and rapid
Refrigerator- Slows bacterial growth
Freezer- Stops bacterial growth

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3
Q

How is penicillin made and extracted in a fermenter?

A
  • Penicillium grows in the fermenter and secretes the antibiotic (penicillin) into the surrounding medium.
  • After incubation, the culture medium is removed filtered and the penicillin extracted.
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4
Q

What is the best conditions for growth for Penicillin

A
  • Optimum pH
  • Optimum temperature
  • Oxygen
  • Nutrients
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WJEC Biology GCSE (9 decks)

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