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1.1 Cell structure

1.1 Cell structure

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Question 27
F

Scientists found a new single-celled organism living in a hot spring.

Electron micrographs of the organism showed:

  • a cell wall
  • ribosomes in the cytoplasm
  • DNA in a single loop, free in the cytoplasm
  • no mitochondria

Each cell was 1.2 μm\mu\text{m}μm long.

a.

Is this organism prokaryotic or eukaryotic?

Give a reason for your answer.

[2]
b.

Explain how the size of the cells supports your answer to part (a).

[1]
c.

Suggest one further observation from the micrographs that would support your answer to part (a).

[1]
Markscheme

1.1 Cell structure Questions

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

163 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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