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1.1 Cell structure

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Question 31
F59%

A student passes an inoculating loop through a Bunsen flame until it glows red, then waits before touching the agar with it. Why does the student wait?

[1]
A

So that the hot loop does not melt the plastic lid of the Petri dish above it

B

So that microorganisms in the air have time to settle away from the agar

C

So that the metal of the loop has time to become sterile all the way through

D

So that the hot loop does not kill the bacteria being transferred to the agar

Markscheme

1.1 Cell structure Questions

  1. GCSE
  2. /Biology
  3. /1.1 Cell structure

282 exam-style questions on AQA GCSE Biology 1.1 Cell structure, covering 1.1.1 Eukaryotes and prokaryotes, 1.1.2 Animal and plant cells, 1.1.3 Cell specialisation, 1.1.4 Cell differentiation, 1.1.5 Microscopy, and 1.1.6 Culturing microorganisms. Each one has a worked solution and a mark scheme showing where the marks go.

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