Define biotechnology and describe how living organisms and their parts are used to make useful products and provide services

What this dot point is asking

This outcome asks you to say clearly what biotechnology is and to describe how living organisms, or parts of them, are put to work to make useful products and provide services. The central idea is simple but powerful: instead of building everything from raw chemicals, we can recruit cells, microorganisms and molecules such as DNA and enzymes to do the work for us.

The answer

A working definition

Biotechnology is the use of living organisms, or their parts such as cells and enzymes, to make useful products or to provide services that benefit people, agriculture, industry or the environment. The "bio" is the living tool, and the "technology" is the practical, deliberate way we use it.

The living tools

Biotechnology does not always need a whole organism. The tools fall into a few groups:

• Whole microorganisms such as bacteria, yeasts and fungi, grown in large numbers to make a product.
• Cells from plants or animals, grown in culture for research or production.
• Molecules taken from living things, especially enzymes that speed up reactions and DNA that carries genetic instructions.

What it is used for

The products and services span many fields:

• Medicine and health. Making medicines such as insulin, producing vaccines, and diagnosing disease.
• Agriculture and food. Improving crops, and fermenting foods such as bread, yoghurt and soy sauce.
• Industry. Using enzymes in detergents and producing fuels such as ethanol.
• The environment. Using microorganisms to break down waste and clean up pollution.

Why it is interdisciplinary

Biotechnology sits where biology, chemistry and engineering meet. Biology supplies the understanding of cells and DNA, chemistry handles the molecules and their purification, and engineering scales a process up to industrial volumes. This is why teams, not single specialists, deliver biotechnology products.

Examples in context

Example 1. Insulin for diabetes. Before biotechnology, insulin was extracted from animal pancreases. Today, bacteria carrying the human insulin gene make a pure, plentiful supply of human insulin. This single example shows the whole idea: a living tool, the bacterium, making a useful medical product.

Example 2. Everyday fermented food. A jar of yoghurt is biotechnology in your fridge. Bacteria ferment the sugars in milk into lactic acid, thickening it and giving the tangy taste. The same principle, microorganisms turning a raw material into a useful product, drives much of the industry.

Try this

Q1. Define biotechnology in one sentence. [2 marks]

• Cue. The use of living organisms, or their parts such as cells and enzymes, to make useful products or provide services that benefit people, agriculture, industry or the environment.

Q2. Name the living tool and the product for two examples of biotechnology. [2 marks]

• Cue. For example, yeast produces ethanol and carbon dioxide in brewing; bacteria produce insulin for treating diabetes.

Q3. State two different fields in which biotechnology is applied and give one example from each. [2 marks]

• Cue. Medicine, for example producing vaccines; agriculture and food, for example fermenting milk into yoghurt.