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Communicable diseases, disease prevention and the immune system

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Question 6

Bacterial ring rot is a highly destructive plant disease affecting potato crops, caused by the pathogen Clavibacter michiganensisClavibacter\ michiganensisClavibacter michiganensis.

Which of the following statements correctly describe how this pathogen is transmitted between potato plants or tubers?

  1. Direct contact between infected and healthy potato tubers during storage.
  2. Transfer of bacterial cells via contaminated agricultural machinery and harvesting equipment.
  3. Dissemination of wind-blown endospores that infect healthy leaf foliage during dry weather.
A

1, 2 and 3

B

Only 1 and 2

C

Only 2 and 3

D

Only 1

Markscheme

Communicable diseases, disease prevention and the immune system Questions

  1. A Level
  2. /Biology
  3. /Communicable diseases, disease prevention and the immune system

40 exam-style questions on OCR A A Level Biology Communicable diseases, disease prevention and the immune system. Each one has a worked solution and a mark scheme showing where the marks go.

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