Biotechnology: An Overview

The One Thing

Biotechnology applies living organisms, cells, biological molecules, or biological processes to produce useful products and services. Its development from fermentation and selective breeding to genetic engineering has increased precision and scale, but its application requires biosafety, ethical consideration, regulatory control, affordability, and environmental responsibility.

Reactions, Processes and Experiments

Key Terms

• Biotechnology: The application of living organisms, cells, cellular components, or biological processes to create or improve products and services.
• Traditional biotechnology: The use of naturally occurring organisms and biological processes, often developed through experience, such as making curd, bread, cheese, and fermented beverages.
• Modern biotechnology: The use of molecular biology and genetic engineering to modify organisms or biological molecules for specific purposes.
• Fermentation: A biological process in which microorganisms convert substances such as sugars into useful products, including alcohol, organic acids, and gases.
• Genetic engineering: The deliberate modification of an organism’s genetic material to introduce, remove, or alter particular characteristics.
• Recombinant DNA technology: A technique in which DNA fragments from different sources are joined and introduced into a host organism to produce a desired gene product.
• Bioprocess technology: The design and control of biological production processes, including the use of bioreactors, suitable nutrients, temperature, pH, oxygen, and purification methods.
• Bioreactor: A vessel or system that provides controlled conditions for growing cells or microorganisms and producing biological products on a large scale.
• Genomics: The study of the complete genetic material of an organism, including the structure, function, and interactions of its genes.
• Proteomics: The study of the complete set of proteins produced by a cell, tissue, or organism.
• Bioinformatics: The use of computers, databases, and statistical tools to store, analyse, and interpret biological information.
• Biopharmaceutical: A medicine or therapeutic product made using biological systems, such as recombinant proteins, vaccines, antibodies, or cell-based products.
• Genetically modified organism: An organism whose genetic material has been changed using genetic engineering techniques.
• Transgenic organism: An organism containing and expressing a gene introduced from another species or source.
• Biosafety: The principles, practices, and procedures used to prevent harm to humans, animals, plants, and the environment during biotechnology research and applications.
• Bioethics: The study of moral and social issues related to biotechnology, including genetic modification, privacy, consent, animal use, and access to treatment.
• Upstream processing: The preparation and growth stage of a bioprocess, including selecting the organism, preparing the medium, and maintaining suitable culture conditions.
• Downstream processing: The recovery, separation, purification, testing, and packaging of a product obtained from a biological process.

Easily Confused

• Traditional biotechnology and modern biotechnology: Traditional biotechnology relies mainly on naturally occurring organisms and processes such as fermentation and selective breeding; modern biotechnology uses molecular biology and genetic engineering for targeted modification.
• Genetic engineering and recombinant DNA technology: Genetic engineering is the deliberate alteration of genetic material generally; recombinant DNA technology specifically joins DNA fragments from different sources and introduces them into a host.
• Genetically modified organism and transgenic organism: Every transgenic organism is genetically modified, but a genetically modified organism need not contain a gene introduced from another species or source.
• Upstream processing and downstream processing: Upstream processing prepares and grows the biological system; downstream processing recovers, purifies, tests, and packages the product.
• Genomics and proteomics: Genomics studies the complete genetic material; proteomics studies the complete set of proteins produced.
• Biosafety and bioethics: Biosafety concerns the prevention and control of biological risks; bioethics concerns moral and social questions surrounding biotechnology.
• Biotechnology and genetic modification: Biotechnology includes fermentation, enzyme technology, cell culture, tissue culture, and computational biology as well as genetic modification.

What Gets Asked

• Define biotechnology and distinguish traditional from modern biotechnology. Marks are lost by treating biotechnology as synonymous with genetic modification, despite its inclusion of fermentation, enzyme technology, cell culture, tissue culture, and computational biology.
• Describe the historical development of biotechnology. Relevant details include early domestication, selective breeding, and fermentation; Karl Ereky’s use of the word biotechnology in 1919; the 1953 announcement of DNA’s double-helical structure by James Watson and Francis Crick, based partly on evidence from Rosalind Franklin and Maurice Wilkins; and the development of recombinant DNA technology during the 1970s.
• Explain recombinant DNA technology and the production of human insulin. Answers should include restriction enzymes, DNA ligase, plasmids, DNA transfer methods, and the first genetically engineered bacterium producing human insulin in the late 1970s.
• Sequence a biotechnology production pathway. The required sequence is organism or gene selection → culture or genetic modification → bioreactor production → product recovery → purification → quality testing → formulation and packaging. Confusing upstream processing with downstream processing costs marks.
• Identify applications of biotechnology in different sectors. Examples include antibiotics, vaccines, insulin, enzymes, diagnostic kits, biofertilizers, biopesticides, tissue-culture plants, processed foods, biofuels, biodegradable materials, sewage treatment, and bioremediation.
• Discuss the benefits and limitations of biotechnology. Benefits include improved health, food security, industrial efficiency, and environmental management; limitations and responsibilities include ecological and health risks, biosafety, bioethics, biodiversity, social equity, regulation, public acceptance, manufacturing capacity, affordability, and access.