Aseptic techniques are essential when culturing microorganisms to prevent contamination and ensure safety.
Which of the following options describes an incorrect part of the procedure when inoculating an agar-filled Petri dish with bacteria?
Heat the inoculating loop in a Bunsen burner flame until it is red-hot, then immediately dip it into the bacterial culture before transferring it to the agar.
Lift the lid of the Petri dish only slightly and at an angle when spreading the culture on the agar.
Secure the lid of the Petri dish with a few pieces of tape rather than sealing it completely around the entire circumference.
Incubate the inoculated Petri dish upside down.
40 exam-style questions on OCR A A Level Biology Communicable diseases, disease prevention and the immune system. Each one has a worked solution and a mark scheme showing where the marks go.