molecular biology - the branch of biology that studies the structure and activity of macromolecules essential to life (and especially with their genetic role)

bioremediation - the branch of biotechnology that uses biological process to overcome environmental problems

gene-splicing, genetic engineering, recombinant DNA technology - the technology of preparing recombinant DNA in vitro by cutting up DNA molecules and splicing together fragments from more than one organism

applied science, engineering science, technology, engineering - the discipline dealing with the art or science of applying scientific knowledge to practical problems; "he had trouble deciding which branch of engineering to study"