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Culturing Microorganisms (biology Only) (GCSE Biology)

The following is a GCSE Biology test covering 'Culturing Microorganisms (biology Only)' from the broader topic Cell Biology. The test is geared towards the AQA exam board style syllabus.
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Below a typical questions that will be covered in this test. You final score will be logged on your account

Which statement best describes antibiotic resistance in bacteria?
What is the main purpose of performing serial dilutions before plating a sample?
Which laboratory practice reduces the chance of contaminating a microbial culture?
When performing a disc diffusion test to compare two antibiotics, which quantitative measurement gives a fair comparison?
What does a clear “zone of inhibition” around an antibiotic paper disc on an agar plate indicate?
Which of the following is a correct step to obtain a pure culture from a mixed sample?
Why is it important to incubate replicated plates or samples when doing an experiment?
Why might a lab use selective media when isolating microbes from a mixed environmental sample?
Which of the following is a safe method to dispose of used agar plates in a school laboratory?
Why are anaerobic jars or media used when culturing obligate anaerobes?
Which medium property makes it “selective” (for example, MacConkey agar selecting for Gram-negative bacteria)?