Biotechnology

Recombinant DNA, monoclonal antibodies, and industrial bioreactor engineering

What is biotechnology?

Biotechnology is the practical application of biological knowledge and living systems to develop useful products and technologies — using what's understood about cells, genes, and organisms (covered throughout this Biology branch) to solve real-world problems in medicine, agriculture, and industry.

Genetic engineering

Genetic engineering is the direct modification of an organism's DNA to give it a new or altered trait. Using the molecular tools covered in the Molecular Biology article, scientists can insert a specific gene into an organism, letting it produce a protein it couldn't make on its own. Bacteria have been engineered this way to produce human insulin for diabetes treatment, and crop plants have been engineered to resist pests or tolerate difficult growing conditions.

Producing biological products

Biotechnology is also used to manufacture useful biological products at scale, including medicines. Many modern drugs, called biologics, are large, complex protein molecules that can only realistically be produced by living cells rather than through ordinary chemical synthesis. Antibodies, vaccines, and various hormone treatments are commonly produced this way, using carefully engineered cells grown in large industrial bioreactors.

Biotechnology in agriculture

In agriculture, biotechnology has been used to develop crops with improved yield, pest resistance, or nutritional content, and to create more efficient methods for producing food and other agricultural products. These applications draw directly on the genetics and botany principles covered elsewhere in this branch.

Why biotechnology matters

Biotechnology has directly enabled the production of life-saving medicines that would otherwise be difficult or impossible to manufacture, contributed to increased agricultural productivity supporting a growing global population, and continues to drive advances in diagnostics, environmental cleanup, and industrial manufacturing processes.