Culturing Microorganisms (AQA GCSE Biology): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What does the culture medium contain to provide energy for microorganisms?
What does the culture medium contain to provide energy for microorganisms?
Carbohydrates
In nutrient broth, why is the flask stoppered with cotton wool?
In nutrient broth, why is the flask stoppered with cotton wool?
To prevent air contaminating it
What are inoculating loops used for?
What are inoculating loops used for?
Spreading microorganisms over agar
Why must Petri dishes be sterilised before use?
Why must Petri dishes be sterilised before use?
Prevent contamination from other microbes
How are inoculating loops sterilised?
How are inoculating loops sterilised?
Passing through a flame
Why shouldn't the Petri dish lid be sealed all the way around?
Why shouldn't the Petri dish lid be sealed all the way around?
Harmful anaerobic bacteria would grow
Why is the Petri dish stored upside down?
Why is the Petri dish stored upside down?
Prevent condensation disrupting growth
Why are cultures incubated at 25°C rather than 37°C?
Why are cultures incubated at 25°C rather than 37°C?
Prevent harmful human bacteria growing
What is binary fission?
What is binary fission?
One bacterium splitting into two
How fast can bacteria multiply by binary fission?
How fast can bacteria multiply by binary fission?
As fast as every 20 minutes
What should the control disc be soaked in when testing antibiotics?
What should the control disc be soaked in when testing antibiotics?
Sterile water
What does a larger zone of inhibition indicate?
What does a larger zone of inhibition indicate?
More effective antibiotic