Several strawberry plants in a polytunnel have spots on their leaves. A leaf from one of these plants is tested using a monoclonal antibody testing kit for pathogen P. The result is positive.
Which is the best conclusion?
Pathogen P is present in the plant that was tested
Every plant with spots is infected with pathogen P
The antibodies in the kit will now kill pathogen P
The kit shows that spots are present but not their cause
133 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.