An autoclave is used to prepare a growth medium and reusable Petri dishes before bacteria are added.
What is the purpose of using the autoclave?
to increase nutrients already present in the medium and dishes
to kill microorganisms already present in the medium and dishes
to measure microorganisms already present in the medium and dishes
to remove nutrients already present in the medium and dishes
45 exam-style questions on Edexcel GCSE Biology 5.3 Immune system and medicines, covering 5.3.1 The specific immune system, 5.3.2 Response to immunisation, 5.3.3 Advantages and disadvantages of immunisation, 5.3.4 Antibiotics and bacterial infections, 5.3.5 Aseptic techniques in culturing, 5.3.6 Cross-sectional areas of cultures, 5.3.7 Stages of developing new medicines, and 5.3.8 Production of monoclonal antibodies. Each one has a worked solution and a mark scheme showing where the marks go.