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3.3 Plant disease

3.3 Plant disease

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Question 5
H

The figure shows a testing kit used to find out whether a plant is infected by one particular pathogen. A sample of liquid from the plant is added to the kit. The figure also shows the results given by three of these kits, A, B and C.

Figure: A testing kit for a plant pathogen, and the results given by three of these kits

image

a.

Explain why this kit detects only one type of pathogen.

[2]
b.

Give the conclusion that should be made from the result shown by kit A and from the result shown by kit B.

[2]
c.

Kit C shows no coloured lines. Suggest why the grower should not conclude from kit C that the plant is free from the pathogen.

[1]
Markscheme

3.3 Plant disease Questions

  1. GCSE
  2. /Biology
  3. /3.3 Plant disease

58 exam-style questions on AQA GCSE Biology 3.3 Plant disease, covering 3.3.1 Detection and identification of plant diseases and 3.3.2 Plant defence responses. Each one has a worked solution and a mark scheme showing where the marks go.

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