A marine biologist and cancer researcher worked together to isolate the green fluorescent protein (GFP) gene from a sample of jellyfish DNA. Scientists have successfully inserted this gene into a cancerous tumor in humans in order for the tumor to glow so it can be more easily removed during surgery. What biotechnology is used to accomplish this procedure?

Gel electrophoresis
Polymerase chain reaction
Restriction enzyme digestion
Transgenic technology

A is incorrect