Aseptic techniques (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 is the main purpose of aseptic techniques?
What is the main purpose of aseptic techniques?
To prevent contamination
How are Petri dishes sterilised at the factory?
How are Petri dishes sterilised at the factory?
Using gamma radiation
Which equipment is used to sterilise culture media like nutrient broth and agar gel?
Which equipment is used to sterilise culture media like nutrient broth and agar gel?
Autoclave
How are wire loops sterilised in the laboratory?
How are wire loops sterilised in the laboratory?
By heating in Bunsen burner flame
What process do bacteria use to reproduce?
What process do bacteria use to reproduce?
Binary fission
Under ideal conditions, how often can bacteria divide?
Under ideal conditions, how often can bacteria divide?
Every 20 minutes
Why should you never blow on a hot wire loop to cool it?
Why should you never blow on a hot wire loop to cool it?
It introduces bacteria from breath
What temperature do school laboratories use for incubating bacteria?
What temperature do school laboratories use for incubating bacteria?
25°C
Why do schools incubate bacterial cultures at 25°C rather than 37°C?
Why do schools incubate bacterial cultures at 25°C rather than 37°C?
It reduces risk of harmful bacteria
If bacteria divide every 30 min, starting with 100, how many after 3 hours?
If bacteria divide every 30 min, starting with 100, how many after 3 hours?
6,400 bacteria
What do antiseptics do?
What do antiseptics do?
Kill or stop growth of microorganisms
How should you open a Petri dish during inoculation?
How should you open a Petri dish during inoculation?
Open upside down near a flame