Foundations of Biotechnology
| Site: | Young Education |
| Cours: | Biotechnology |
| Livre: | Foundations of Biotechnology |
| Imprimé par: | ゲストユーザ |
| Date: | lundi 5 octobre 2026, 03:04 |
1. What Is Biotechnology?
Learning outcomes
- I can define biotechnology and explain its purpose.
- I can identify examples of biotechnology in everyday life.
- I can distinguish between traditional and modern biotechnology.
- I can explain how living organisms are used to solve human problems.
- I can describe major fields of biotechnology.
What Is Biotechnology?
Biotechnology is the use of living organisms, cells, or biological processes to create useful products, improve processes, or solve problems.
The word can be divided into two parts:
- Bio means life or living organisms.
- Technology means the use of knowledge, tools, and techniques to solve problems.
Biotechnology therefore combines biology and technology.
Humans have been using biotechnology for thousands of years. Early forms included using microorganisms to make bread, cheese, and fermented foods. Modern biotechnology can involve manipulating DNA, growing cells in laboratories, and genetically modifying organisms.
Why Do We Use Biotechnology?
The main purpose of biotechnology is to use biological systems to produce something useful or solve a problem.
Biotechnology can help us:
- produce medicines and vaccines
- improve food production
- develop crops with useful characteristics
- diagnose diseases
- manufacture useful chemicals and enzymes
- treat waste and pollution
- produce renewable fuels
- study genes and inherited characteristics
Biotechnology has become important in medicine, agriculture, industry, food production, and environmental science.
Living Organisms as Biological Tools
One of the most important ideas in biotechnology is that living organisms can act as biological tools.
Scientists may use whole organisms, individual cells, enzymes, or genetic material.
Microorganisms
Bacteria and yeast can grow rapidly and carry out useful chemical reactions.
For example, yeast converts sugars into carbon dioxide and ethanol during fermentation.
This process is used in:
- bread making
- brewing
- biofuel production
Enzymes
Enzymes are biological catalysts produced by living organisms. They speed up chemical reactions and can be used in many industrial processes.
For example, enzymes are used in:
- biological washing detergents
- food processing
- cheese production
- fruit juice production
Cells
Scientists can grow cells under controlled laboratory conditions. These cells can be used to study diseases, test medicines, or produce useful biological substances.
DNA
Modern biotechnology allows scientists to study and sometimes alter an organism's genetic material.
This can allow organisms to produce substances that they would not normally produce.
Traditional Biotechnology
Traditional biotechnology uses living organisms and biological processes without directly manipulating their DNA.
Humans were using these techniques long before they understood microorganisms, cells, or genetics.
Fermentation
Fermentation by microorganisms has been used for thousands of years.
For example:
Bread
Yeast breaks down sugars and produces carbon dioxide.
The carbon dioxide becomes trapped in the dough, causing it to rise.
Yogurt
Bacteria convert lactose into lactic acid, helping produce yogurt's characteristic texture and flavour.
Cheese
Microorganisms and enzymes are used to change milk into cheese.
Selective Breeding
Humans have also selectively bred plants and animals for desirable characteristics.
Farmers may choose organisms with characteristics such as:
- larger fruits
- higher milk production
- faster growth
- disease resistance
These organisms are bred so that desirable characteristics are more likely to appear in future generations.
Modern Biotechnology
Modern biotechnology uses advanced scientific techniques to study or manipulate cells, genes, and biological molecules.
A major development in modern biotechnology has been our ability to work directly with DNA.
Modern techniques include:
- genetic engineering
- DNA sequencing
- gene editing
- tissue culture
- cloning
- production of genetically modified organisms
- production of medicines using genetically modified microorganisms
For example, bacteria can be genetically modified to contain the human gene for insulin. The bacteria then use this genetic information to produce human insulin, which can be purified and used as a medicine.
Traditional vs Modern Biotechnology
| Traditional Biotechnology | Modern Biotechnology |
|---|---|
| Has been used for thousands of years | Developed mainly through advances in modern biology |
| Often uses whole organisms | Can work directly with cells and DNA |
| Does not directly modify DNA | May directly manipulate genetic material |
| Often uses naturally occurring processes. | Uses specialised laboratory techniques |
| Bread making and yogurt production | Genetic engineering and gene editing |
| Selective breeding | Genetic modification |
Both forms of biotechnology use biological systems for useful purposes.
The major difference is the level of control scientists have over the biological processes involved.
Biotechnology in Everyday Life
Biotechnology may sound highly specialised, but many biotechnology products are part of everyday life.
Food
Microorganisms are used to produce:
- bread
- yogurt
- cheese
- vinegar
- fermented foods
Medicine
Biotechnology is used to produce and develop:
- insulin
- vaccines
- antibiotics
- diagnostic tests
- some forms of gene and cell therapy
Agriculture
Biotechnology can help produce:
- disease-resistant crops
- pest-resistant crops
- crops with improved nutritional characteristics
- plants produced rapidly through tissue culture
Household Products
Some laundry detergents contain enzymes produced using microorganisms.
These enzymes help break down substances such as:
- proteins
- fats
- starches
This helps remove stains from clothing.
Major Fields of Biotechnology
Biotechnology covers a wide range of scientific fields.
Medical Biotechnology
Medical biotechnology uses biological processes to improve human health.
Applications include:
- vaccines
- medicines
- diagnostic tests
- genetic testing
- gene therapy
- production of hormones such as insulin
Agricultural Biotechnology
Agricultural biotechnology aims to improve crops, livestock, and food production.
Applications include:
- selective breeding
- genetically modified crops
- disease-resistant plants
- tissue culture
- improved crop yields
Industrial Biotechnology
Industrial biotechnology uses organisms, cells, and enzymes to manufacture useful products.
Applications include:
- enzymes
- biofuels
- chemicals
- food ingredients
- biodegradable materials
Environmental Biotechnology
Environmental biotechnology uses biological processes to help protect or restore the environment.
Applications include:
- wastewater treatment
- decomposition of waste
- pollution control
- bioremediation
Bioremediation involves using organisms, particularly microorganisms, to remove or break down pollutants.
Biotechnology and Human Problems
Biotechnology is particularly powerful because organisms have already evolved the ability to perform an enormous variety of chemical processes.
Instead of designing every process from the beginning, scientists can sometimes use or modify biological systems.
For example:
Problem: A patient cannot produce enough insulin.
Biotechnology solution: Genetically modified bacteria can produce human insulin.
Problem: Wastewater contains organic pollutants.
Biotechnology solution: Microorganisms can break down many of the pollutants during wastewater treatment.
Problem: Farmers need large numbers of genetically similar plants.
Biotechnology solution: Tissue culture can produce many plants from a small amount of plant tissue.
Biotechnology therefore applies our understanding of living systems to practical human needs.
Benefits and Challenges of Biotechnology
Biotechnology has the potential to provide major benefits to society, but some applications also raise important questions.
Potential benefits include:
- improved healthcare
- increased food production
- reduced environmental pollution
- development of new medicines
- more efficient industrial processes
However, scientists and society must also consider issues such as:
- safety
- environmental effects
- cost and accessibility
- animal welfare
- genetic privacy
- ethical concerns about modifying organisms
As biotechnology becomes more powerful, understanding both its scientific possibilities and its consequences becomes increasingly important.
Did You Know?
Biotechnology is much older than modern genetics.
Humans were using yeast to make bread and fermented drinks thousands of years before anyone knew that microorganisms existed. Modern biotechnology builds on these ancient biological processes using our much greater understanding of cells, DNA, genes, and enzymes.
Key Vocabulary
Biotechnology — The use of organisms, cells, or biological processes to produce useful products or solve problems.
Traditional biotechnology — The use of naturally occurring biological processes without directly manipulating DNA.
Modern biotechnology — The use of advanced biological techniques involving cells, genes, DNA, or other biological molecules.
Fermentation — A process in which microorganisms break down substances such as sugars, often producing useful products.
Genetic engineering — The deliberate modification of an organism's genetic material.
Selective breeding — Choosing organisms with desirable characteristics to reproduce.
Bioremediation — The use of organisms to remove or break down environmental pollutants.
Tissue culture — Growing cells or tissues under controlled laboratory conditions.
Key Takeaways
- Biotechnology combines biology and technology to produce useful products and solve problems.
- Humans have used biotechnology for thousands of years.
- Traditional biotechnology includes fermentation and selective breeding.
- Modern biotechnology can involve working directly with cells, genes, and DNA.
- Organisms, microorganisms, enzymes, cells, and DNA can all be used as biological tools.
- Biotechnology is important in medicine, agriculture, industry, food production, and environmental protection.
- Everyday examples include bread, yogurt, medicines, detergents, and agricultural products.
- Modern biotechnology provides powerful solutions to human problems but can also raise important safety, environmental, and ethical questions.
2. History of Biotechnology
Learning outcomes
- I can describe important milestones in the history of biotechnology.
- I can explain how early humans used biotechnology in food production.
- I can identify major scientific discoveries that advanced biotechnology.
- I can explain the impact of DNA discovery on biotechnology.
- I can compare traditional biotechnology with modern techniques.
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3. Microorganisms in Biotechnology
Learning outcomes
- I can identify microorganisms commonly used in biotechnology.
- I can explain how bacteria and yeast are used in industrial processes.
- I can describe the role of microbes in fermentation.
- I can explain why microorganisms are useful for large-scale production.
- I can evaluate the benefits of using microbes in biotechnology.
4. Cells, DNA, and Biotechnology
Learning outcomes
- I can describe the relationship between cells, DNA, and genes.
- I can explain how genetic information controls traits.
- I can identify cellular components involved in biotechnology.
- I can explain why DNA is important in biotechnology applications.
- I can describe how scientists manipulate genetic material.
Cells, DNA, and Biotechnology
Modern biotechnology depends on understanding how cells store and use genetic information. Inside cells, DNA contains instructions that influence how organisms grow, develop, function, and reproduce.
Scientists can study and sometimes modify this genetic information to produce useful organisms, substances, medicines, and technologies.
A useful relationship to remember is:
Cells contain DNA → DNA contains genes → Genes contain instructions → Instructions influence traits
Cells: The Basic Units of Life
A cell is the basic structural and functional unit of a living organism.
Some organisms, such as bacteria and yeast, consist of only one cell, while plants and animals contain enormous numbers of specialised cells.
Cells carry out essential processes including:
- obtaining and using energy
- producing proteins
- removing waste
- responding to their environment
- growing
- reproducing
Biotechnology often involves using or modifying these natural cellular processes.
Where Is DNA Found?
In eukaryotic cells, such as plant and animal cells, most DNA is located inside the nucleus.
The DNA is organised into structures called chromosomes.
Therefore:
Cell → Nucleus → Chromosomes → DNA → Genes
Bacteria are different because they do not have a nucleus. Their main chromosome is found in the cytoplasm, in a region called the nucleoid.
Many bacteria also contain small circular pieces of DNA called plasmids.
Plasmids are especially important in biotechnology.
What Is DNA?
DNA stands for deoxyribonucleic acid.
DNA is the molecule that stores hereditary genetic information in living organisms.
A DNA molecule consists of two strands twisted into a structure called a double helix.
DNA contains four different bases:
- adenine (A)
- thymine (T)
- cytosine (C)
- guanine (G)
The order, or sequence, of these bases stores genetic information.
What Is a Gene?
A gene is a section of DNA containing information used to produce a functional product, often a particular protein.
A single DNA molecule contains many genes.
For example, genes can influence characteristics associated with:
- blood groups
- pigmentation
- growth
- metabolism
- production of particular enzymes
- many other biological characteristics
Genes do not usually produce traits directly. Instead, many genes contain instructions that cells use to make proteins, and those proteins help produce observable characteristics.
A simplified relationship is:
Gene → Protein → Cell function → Trait
How Can Genetic Information Control Traits?
Proteins perform many important functions inside organisms.
They can act as:
- enzymes
- hormones
- receptors
- antibodies
- structural components
- transport proteins
Because genes provide information for making proteins, differences in DNA can sometimes result in different versions or amounts of proteins.
This can contribute to differences in traits.
For example, a gene may contain instructions for an enzyme involved in producing a pigment.
DNA sequence
↓
Gene information
↓
Protein produced
↓
Chemical reaction occurs
↓
Pigment produced
↓
Observable characteristic
However, most traits are more complicated than a single gene producing a single characteristic. Many traits are influenced by multiple genes and environmental factors.
DNA, RNA, and Protein Production
Cells generally do not use DNA directly as the template at the site of protein synthesis.
Instead, information from DNA can be copied into a molecule called RNA.
A simplified pathway is:
DNA → RNA → Protein
This is sometimes called the central dogma of molecular biology.
The process of making RNA from DNA is called transcription.
The information in RNA can then be used by ribosomes to build proteins. This process is called translation.
These processes are extremely important in biotechnology because scientists can introduce genetic instructions into cells and use the cells to manufacture particular proteins.
Important Cellular Components in Biotechnology
Several cell structures are particularly important.
| Component | Function | Biotechnology Importance |
|---|---|---|
| DNA | Stores genetic information | Can be analysed or modified |
| Genes | Contain specific genetic instructions | Can be transferred or edited |
| Nucleus | Contains most DNA in eukaryotic cells | Important when modifying plant or animal cells |
| Ribosomes | Build proteins | Produce proteins encoded by genes |
| Enzymes | Control chemical reactions | Used extensively in biotechnology |
| Plasmids | Small DNA molecules in many bacteria | Can carry genes into bacterial cells |
| Cell membrane. | Controls movement into and out of cells. | Important when introducing material into cells |
Why Are Plasmids Important?
Plasmids are small, usually circular DNA molecules found naturally in many bacteria.
They are separate from the bacterium's main chromosome.
Scientists can modify plasmids so that they carry useful genes.
This makes plasmids useful as vectors.
A vector is something used to carry genetic material into a cell.
Why Is DNA Important in Biotechnology?
DNA is important because it contains the instructions used by cells.
If scientists can identify, copy, transfer, or modify those instructions, they can influence what a cell does.
DNA technology can therefore be used to:
- identify organisms
- diagnose some diseases
- study inherited conditions
- identify particular genes
- produce useful proteins
- genetically modify crops
- investigate biological relationships
- study evolution
- edit particular DNA sequences
DNA is therefore one of the central materials of modern biotechnology.
Manipulating Genetic Material
Scientists have developed several methods for working with DNA.
Depending on the application, scientists may:
Extract → Cut → Copy → Analyse → Transfer → Edit
different pieces of genetic material.
Let's examine some of these processes.
Extracting DNA
The first step in many biotechnology procedures is to extract DNA from cells.
Cells must be broken open so their DNA can be released.
Scientists then separate the DNA from other cellular materials such as:
- proteins
- membranes
- carbohydrates
The purified DNA can then be analysed or manipulated.
DNA extraction is used in research, medicine, agriculture, and forensic science.
Cutting DNA
Scientists can use specialised proteins called restriction enzymes to cut DNA.
Different restriction enzymes recognise particular DNA sequences.
They act like molecular scissors, cutting DNA at specific locations.
This allows scientists to isolate particular sections of genetic material.
Joining DNA
Pieces of DNA can also be joined together.
An enzyme called DNA ligase can connect pieces of DNA.
A simplified genetic-engineering process might therefore involve:
Cut DNA → Insert desired gene → Join DNA
When DNA from different sources is combined, the resulting DNA is called recombinant DNA.
Copying DNA
Scientists often need more DNA than is available in the original sample.
A technique called polymerase chain reaction (PCR) can make enormous numbers of copies of a selected DNA region.
Starting with a tiny amount of DNA:
Small DNA sample
↓
PCR
↓
Millions or billions of copies of the target DNA region
This makes the DNA much easier to analyse.
Transferring Genes Between Organisms
One important biotechnology technique involves transferring a gene into another organism.
For example, scientists can insert a useful gene into a bacterial plasmid.
A simplified process is:
- Identify the desired gene.
- Obtain or make the DNA sequence.
- Insert the DNA into a plasmid.
- Introduce the plasmid into bacterial cells.
- Grow the bacteria.
- The cells may express the inserted gene and produce the desired protein.
Example: Producing Human Insulin
The production of human insulin is a classic example of biotechnology connecting cells, DNA, and proteins.
Scientists can place DNA encoding human insulin into microorganisms such as bacteria or yeast.
The engineered cells can then use the genetic instructions to help manufacture insulin.
The cells are grown in large quantities, and the insulin is collected and purified for medical use.
The basic idea is:
DNA containing insulin instructions
↓
DNA introduced into microorganism
↓
Cell reads genetic information
↓
Protein produced
↓
Insulin collected and purified
This works because the fundamental genetic code and protein-production machinery are shared across living organisms.
Editing DNA
Scientists can also make targeted changes to genetic material.
Modern gene-editing techniques such as CRISPR-based systems can be programmed to target particular DNA sequences.
Depending on the method and purpose, scientists may attempt to:
- remove a DNA sequence
- replace a sequence
- alter individual DNA bases
- disable a gene
- change how a gene functions
Gene editing has applications in biological research, agriculture, medicine, and biotechnology.
It also raises important questions about safety and ethics, particularly when changes could be inherited by future generations.
Using Cells as Biological Factories
Once scientists understand how cells use genetic information, they can use cells to manufacture useful products.
A genetically modified microorganism can essentially become a microscopic biological factory.
For example:
New gene
↓
DNA
↓
RNA
↓
Protein
↓
Useful biotechnology product
Millions or billions of cells can then be grown in bioreactors, allowing large quantities of the product to be manufactured.
Putting the Relationship Together
The connections between these ideas are important:
Cells
Cells provide the biological machinery needed to carry out life processes.
↓
DNA
DNA stores genetic information.
↓
Genes
Genes are specific regions of DNA containing biological instructions.
↓
Proteins
Cells use genetic information to manufacture proteins.
↓
Traits and Functions
Proteins influence cellular functions and many characteristics of organisms.
↓
Biotechnology
Scientists can study or manipulate DNA to change what cells do or what substances they produce.
This gives us the central idea:
Biotechnology uses our understanding of cells and genetic information to produce useful biological outcomes.
Did You Know?
The DNA molecules inside cells are extremely long compared with the cells themselves.
A human cell contains roughly 2 metres of DNA when the DNA in all of its chromosomes is stretched out end to end. Yet this DNA is packaged into a nucleus only a few micrometres across.
Cells accomplish this by tightly organising and packaging DNA into chromatin and chromosomes.
Key Terms
Cell – The basic structural and functional unit of life.
DNA – The molecule that stores hereditary genetic information.
Gene – A region of DNA containing information for a functional product, often a protein.
Chromosome – A structure containing a long DNA molecule associated with proteins.
Protein – A biological molecule with structural, chemical, signalling, or other cellular functions.
Plasmid – A small DNA molecule found naturally in many bacteria and often used as a biotechnology vector.
Vector – A carrier used to introduce genetic material into a cell.
Restriction enzyme – An enzyme that cuts DNA at particular sequences.
DNA ligase – An enzyme that joins pieces of DNA.
Recombinant DNA – DNA formed by combining genetic material from different sources.
Genetic engineering – The deliberate modification of genetic material using biotechnology.
Key Takeaways
- Cells contain genetic information in the form of DNA.
- In eukaryotic cells, most DNA is organised into chromosomes inside the nucleus.
- Genes are regions of DNA containing genetic instructions.
- Genetic information influences traits largely by controlling the production and regulation of proteins.
- A useful simplified pathway is DNA → RNA → protein.
- Important biotechnology components include DNA, genes, plasmids, enzymes, and ribosomes.
- Bacterial plasmids can be used as vectors for carrying genes.
- Scientists can extract, copy, cut, join, transfer, analyse, and edit DNA.
- Manipulating DNA allows scientists to influence what cells produce or how organisms behave.
- Genetically modified microorganisms can be used as biological factories to manufacture useful substances.
- Understanding the relationship between cells, DNA, genes, and proteins provides the foundation for much of modern biotechnology.
5. Modern Applications of Biotechnology
Learning outcomes
- I can identify major modern applications of biotechnology.
- I can explain how biotechnology contributes to medicine, agriculture, and industry.
- I can evaluate the benefits of biotechnology for society.
- I can describe examples of biotechnology used in everyday life.
- I can recognize emerging areas of biotechnology research.
Modern Applications of Biotechnology
Biotechnology uses living organisms, cells, biological molecules, or biological processes to create useful products and solve problems.
Modern biotechnology is used across many areas of society. It contributes to medicine, agriculture, food production, industry, environmental management, and scientific research.
Many biotechnology products are already part of everyday life, while emerging technologies such as gene editing, synthetic biology, and personalised medicine may become increasingly important in the future.
Biotechnology in Modern Society
Biotechnology combines knowledge from several areas, including:
- genetics
- microbiology
- cell biology
- chemistry
- medicine
- agriculture
- engineering
- computer science
Some applications use naturally occurring biological processes, while others involve directly manipulating cells or DNA.
Biotechnology in Medicine
Medicine is one of the most important areas of modern biotechnology.
Biotechnology can be used to:
- manufacture medicines
- produce vaccines
- diagnose diseases
- detect pathogens
- analyse DNA
- develop new treatments
- investigate genetic disorders
Producing Medicines
Genetically modified microorganisms can be used to produce important proteins and medicines.
A classic example is human insulin.
Scientists can introduce DNA containing instructions for human insulin into bacteria or yeast. These microorganisms can then produce the insulin protein.
The general process is:
Human gene
↓
Gene introduced into microorganism
↓
Microorganisms grown
↓
Protein produced
↓
Protein purified
↓
Medicine
Similar biotechnology techniques can be used to manufacture other therapeutic proteins.
Vaccines
Biotechnology is also important in vaccine development and production.
Different biotechnology approaches can use:
- weakened or inactivated microorganisms
- parts of microorganisms
- genetically engineered proteins
- viral vectors
- genetic instructions such as mRNA
For example, mRNA vaccines provide cells with temporary genetic instructions for producing a particular antigen. The immune system then learns to recognise that antigen.
Medical Diagnosis
DNA and molecular biotechnology can help doctors detect diseases or identify microorganisms.
Techniques such as PCR can detect very small amounts of genetic material.
Biotechnology can therefore contribute to:
- detecting infectious organisms
- identifying genetic variants
- studying inherited disorders
- analysing tumour cells
- selecting appropriate treatments
Biotechnology in Agriculture
Humans have used biotechnology in agriculture for thousands of years through selective breeding.
Modern biotechnology provides additional tools for changing or analysing organisms more precisely.
Agricultural biotechnology can be used to develop crops with characteristics such as:
- resistance to insect pests
- resistance to particular diseases
- tolerance of certain environmental stresses
- improved nutritional characteristics
- longer storage life
- improved agricultural productivity
Genetically Modified Crops
A genetically modified organism (GMO) has had its genetic material altered using biotechnology.
Scientists can introduce or modify genes to produce a desired characteristic.
One example is some varieties of Bt crops.
These plants contain genetic information originating from the bacterium Bacillus thuringiensis. The plants can produce particular proteins that are harmful to certain insect pests.
Potential benefits can include:
- reduced crop losses
- reduced use of some insecticides
- improved agricultural productivity
However, agricultural biotechnology also requires consideration of possible:
- ecological effects
- evolution of resistant pest populations
- gene flow
- economic impacts
- regulatory and social concerns
Biotechnology therefore needs to be evaluated, not simply described as beneficial or harmful.
Improving Nutrition
Biotechnology can also be used to alter the nutritional characteristics of crops.
A well-known example is Golden Rice, which was genetically engineered so the grain produces beta-carotene, a precursor that the human body can convert into vitamin A.
This demonstrates how biotechnology may be used to address particular nutritional problems.
However, the effectiveness of any agricultural biotechnology solution also depends on factors such as availability, cost, farming practices, diet, regulation, and public acceptance.
Biotechnology in Food Production
Some of the most familiar examples of biotechnology are found in food.
Microorganisms are used to produce:
- bread
- yogurt
- cheese
- vinegar
- fermented vegetables
- soy products
- other fermented foods
Yeast fermentation, for example, produces carbon dioxide that helps bread dough rise.
Bacteria are used to convert milk into products such as yogurt and cheese.
Although these processes are ancient, modern food industries use carefully selected microorganisms and controlled conditions to make production more consistent and efficient.
Biotechnology in Industry
Biotechnology can replace or supplement some traditional industrial processes.
This is sometimes called industrial biotechnology.
Microorganisms or enzymes can be used to manufacture:
- enzymes
- chemicals
- food ingredients
- pharmaceuticals
- materials
- biofuels
Because biological reactions can sometimes operate under relatively mild conditions, biotechnology may reduce energy use or waste in certain industrial processes.
Enzymes in Everyday Products
Enzymes are biological catalysts that increase the rate of chemical reactions.
Biotechnology allows enzymes to be produced in large quantities using microorganisms.
For example, biological laundry detergents may contain:
- proteases – break down proteins
- lipases – break down fats
- amylases – break down starch
These enzymes help remove different types of stains.
This means biotechnology may be involved every time someone uses certain laundry detergents.
Biotechnology and Biofuels
Microorganisms can also help produce biofuels.
For example, yeast can ferment sugars to produce ethanol.
Ethanol can be used as a fuel or blended with gasoline.
Other biotechnology research investigates the production of fuels using:
- bacteria
- algae
- agricultural waste
- plant material
Biofuels have the potential to reduce reliance on fossil resources, although their overall environmental benefits depend on factors such as land use, energy inputs, feedstocks, and production methods.
Environmental Biotechnology
Living organisms can sometimes be used to reduce environmental pollution.
One important application is bioremediation.
Bioremediation uses microorganisms or other organisms to break down, remove, or transform pollutants.
It can potentially be used in the treatment of:
- contaminated soil
- wastewater
- some petroleum pollution
- certain industrial wastes
Microorganisms can therefore become tools for environmental management.
Biotechnology in Everyday Life
Biotechnology is not limited to research laboratories.
Examples that people may encounter include:
| Product or Activity | Biotechnology Involved |
|---|---|
| Bread | Yeast fermentation |
| Yogurt | Bacterial fermentation |
| Cheese | Microbial and enzyme activity |
| Laundry detergent | Microbial enzymes |
| Some medicines | Genetically engineered microorganisms or cells |
| Some vaccines | Molecular biotechnology |
| Genetic testing | DNA analysis |
| Some crops | Genetic modification or biotechnology-assisted breeding |
| Wastewater treatment. | Microbial activity |
| Bioethanol | Microbial fermentation |
Biotechnology is therefore already integrated into many aspects of modern society.
Benefits of Biotechnology
Biotechnology can provide significant benefits.
Medicine
It can help:
- manufacture important medicines
- develop vaccines
- improve disease diagnosis
- investigate genetic disorders
- develop new treatments
Agriculture
It may help:
- protect crops from some pests and diseases
- improve nutritional characteristics
- reduce crop losses
- develop crops suited to particular environments
Industry
It can:
- manufacture useful enzymes
- produce complex biological molecules
- provide alternative production processes
- potentially reduce waste or energy use in some applications
Environment
It can:
- help treat wastewater
- break down some pollutants
- support waste-management processes
- contribute to development of renewable biological resources
Evaluating Biotechnology
Biotechnology can provide major benefits, but scientific evaluation should also consider risks, costs, limitations, and ethical questions.
For example, questions might include:
- Could a modified organism affect an ecosystem?
- Who controls access to a biotechnology?
- Is the technology affordable?
- Has the product been adequately tested?
- Could genetic information be misused?
- Who should have access to a person's genetic information?
- Are there animal-welfare concerns?
- Are the environmental benefits greater than the environmental costs?
Good evaluation requires consideration of evidence from multiple perspectives.
Emerging Area: Gene Editing
Gene editing allows scientists to make targeted changes to DNA.
CRISPR-based systems have become particularly important because they can be programmed to target specific DNA sequences.
Potential and current applications include:
- studying gene function
- engineering microorganisms
- developing improved crops
- treating certain genetic diseases
- creating new biological research tools
Gene editing is powerful, but some applications also raise important ethical and safety questions.
Emerging Area: Gene and Cell Therapies
Some biotechnology treatments aim to modify a patient's cells or genetic material.
Gene therapy attempts to treat disease by adding, replacing, or modifying genetic information in a patient's cells.
Cell therapy uses living cells as part of a treatment.
For example, some cancer treatments modify a patient's immune cells so they can better recognise particular cancer cells.
These approaches represent an important shift toward treatments designed around specific biological mechanisms.
Emerging Area: Personalised Medicine
People have genetic differences that can influence their risk of certain diseases or their responses to some medicines.
Personalised medicine, sometimes called precision medicine, attempts to use biological information to help select prevention strategies or treatments for particular patients or groups.
Information might include:
- DNA sequences
- genetic variants
- proteins
- medical information
- characteristics of a patient's tumour
Biotechnology could therefore contribute to medicine becoming increasingly individualised.
Emerging Area: Synthetic Biology
Synthetic biology combines biology and engineering.
Instead of simply studying existing biological systems, scientists attempt to design or redesign biological components and systems.
Researchers may engineer microorganisms to produce:
- medicines
- chemicals
- fuels
- materials
- food ingredients
Synthetic biology could eventually allow cells to function as increasingly sophisticated programmable biological factories.
Emerging Area: Tissue Engineering
Scientists are also investigating ways to grow or construct biological tissues.
Tissue engineering combines:
- cells
- biological materials
- engineering
- biotechnology
Possible applications include producing replacement tissues, studying diseases, testing medicines, and repairing damaged tissues.
Researchers are also developing organoids — small laboratory-grown structures that reproduce some features of real organs.
These can provide new ways to investigate human biology without always relying on whole-organism experiments.
Biotechnology: Present and Future
Modern biotechnology has developed from our growing understanding of:
Cells
↓
DNA
↓
Genes
↓
Proteins
↓
Biological processes
↓
Biotechnology applications
This knowledge has allowed scientists to move from simply using naturally occurring biological processes to analysing, controlling, and sometimes redesigning them.
Future biotechnology will likely combine genetics with fields such as engineering, computing, artificial intelligence, and materials science.
Did You Know?
Scientists can now determine DNA sequences vastly faster and more cheaply than was possible during the original Human Genome Project.
Modern sequencing technologies allow researchers to analyse enormous quantities of genetic information, helping drive research in medicine, agriculture, evolution, microbiology, and environmental science.
This has also created a growing field called bioinformatics, which uses computers to store, compare, and analyse biological data.
Key Terms
Biotechnology – The use of organisms, cells, or biological processes to produce useful products or solve problems.
Genetic modification – Deliberately altering an organism's genetic material.
GMO – An organism whose genetic material has been modified using biotechnology.
Bioremediation – The use of organisms to remove, break down, or transform environmental pollutants.
Biofuel – A fuel produced from biological material.
Gene editing – Making targeted changes to DNA.
Gene therapy – Treating disease by adding or modifying genetic material in a patient's cells.
Synthetic biology – The design or redesign of biological components and systems.
Tissue engineering – The use of cells, materials, and engineering techniques to create or repair biological tissues.
Bioinformatics – The use of computational methods to analyse biological information.
Key Takeaways
- Modern biotechnology has applications in medicine, agriculture, food production, industry, and environmental management.
- Biotechnology is used to produce medicines, vaccines, enzymes, foods, crops, and fuels.
- Many everyday products, including bread, yogurt, cheese, and some detergents, involve biotechnology.
- Genetic modification can give organisms useful characteristics or allow cells to manufacture valuable substances.
- Biotechnology can provide benefits such as improved medicine, food production, industrial efficiency, and environmental treatment.
- Biotechnology must also be evaluated for potential environmental, economic, safety, social, and ethical concerns.
- Emerging areas include gene editing, gene therapy, personalised medicine, synthetic biology, and tissue engineering.
- Advances in DNA sequencing and bioinformatics are accelerating biotechnology research.
- Modern biotechnology demonstrates how understanding living systems can be used to address important problems facing society.