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1.1 Cell structure

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Question 8

A food scientist investigates bacteria growing on cooked rice. The bacteria have enough nutrients and a suitable temperature.

At the start there are 400 bacteria. The mean division time of the bacteria is 35 minutes.

How long after the start will the population first reach 12 800 bacteria?

[1]
A

3 hours 30 minutes

B

18 hours 40 minutes

C

2 hours 20 minutes

D

2 hours 55 minutes

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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