The figure shows a monoclonal antibody that carries a drug. It also shows a cancer cell and a healthy cell from the same tissue.
Figure: A monoclonal antibody carrying a drug, shown with a cancer cell and a healthy cell

Name the parts labelled A and B.
Explain why the antibody binds to the cancer cell but not to the healthy cell.
The drug is only released once the antibody has bound to a cell. Suggest why this is important.
The tumour also contains some cancer cells that do not have the triangular antigen. Suggest why this treatment may not destroy the whole tumour.
42 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.