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1.1 Cell structure

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Question 33
H

A student wrote the following about a culture of bacteria.

'The culture starts with 300 bacteria. After 10 divisions there will be 3000 bacteria, because 10 divisions means the number is multiplied by 10.'

a.

Explain why the student is wrong.

[2]
b.

Calculate the correct number of bacteria after 10 divisions. Give your answer in standard form.

[2]
c.

The mean division time of this bacterium is 18 minutes.

Calculate the time taken for the 10 divisions. Give your answer in hours and minutes.

[1]
Markscheme

1.1 Cell structure Questions

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

129 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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