A laboratory uses monoclonal antibody A to test milk for bacterial contamination. The test gives a positive result if antibody A binds to an antigen in the milk.
The binding site of antibody A is complementary to an antigen with a triangular end.
| Bacterium | Shape of the end of the antigen |
|---|---|
| J | circular |
| K | triangular |
| L | square |
Which bacterium will antibody A bind to?
A milk sample contains bacterium L only. State the result of the test. Give one reason for your answer.
60 exam-style questions on AQA GCSE Biology 3.2 Monoclonal antibodies (HT only), covering 3.2.1 Producing monoclonal antibodies and 3.2.2 Uses of monoclonal antibodies. Each one has a worked solution and a mark scheme showing where the marks go.