A scientist adds monoclonal antibodies that bind to chemical M to a thin section of fern root tissue. The antibodies are joined to a fluorescent dye. Unbound antibodies are washed off and the section is viewed under a microscope. Only the cells in the outer layer of the root glow.
What is the best conclusion from this result?
Chemical M is present in the cells of the outer layer of the root.
The antibodies have bound to every type of molecule in the outer layer.
The fluorescent dye has bound directly to chemical M in the outer layer.
The antibodies have destroyed chemical M in the inner cells of the root.
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.