Final answer:
Monoclonal antibodies are highly specific antibodies used in the treatment of diseases, such as cancer, and are created in a laboratory to react with a single antigen.
Step-by-step explanation:
The type of antibody that can be created in a laboratory for the treatment of diseases such as cancer and will only react with a single antigen is known as a monoclonal antibody. Monoclonal antibodies are highly specific as they are produced from a single clone of B-cells and bind uniquely to a single epitope on an antigen. This specificity makes them invaluable for use in medical treatments and diagnostics, including cancer therapy, where they help target cancer cells without affecting normal cells. They are produced using hybridoma technology, which allows for the formation of hybridoma cells that can be cultured to produce large quantities of the desired monoclonal antibody.