BIO5101 Midterm Notes Set 2

Complete Note (Topic 001-020)

Topic 001 – Introduction to Biotechnology

1. Definition of Biotechnology

Biotechnology is the branch of science that involves the use of living organisms, cells, or biological molecules to develop products, processes, or technologies that improve human life and the environment.

Key Components:

o Organisms: Bacteria, yeast, plants, animals o Cells: Stem cells, cultured cells o Molecules: DNA, RNA, proteins, enzymes

Formal Definition:

“Biotechnology is the integrated use of biological systems, organisms, or derivatives to make or modify products, improve plants or animals, or develop microorganisms for specific uses.”

2. Historical Background

Biotechnology is not a modern invention. Its history can be traced back thousands of years:

Era · Application · Notes

Ancient Fermentation Making bread, beer, and wine

19th century Microbial cultivation Pasteur studied fermentation and disease

20th century Genetic manipulation Discovery of DNA, enzymes, and recombinant DNA

1970s Modern biotech First recombinant insulin produced using bacteria Recombinant DNA (rDNA) is DNA created in a lab by combining genetic material from two or more different sources, often different species, using enzymes like restriction enzymes to cut and ligases to join DNA segments. Key Point: Modern biotechnology builds on traditional techniques, adding molecular and genetic tools for precise applications.

3. Branches of Biotechnology

1. Medical Biotechnology

o Gene therapy, recombinant vaccines, diagnostics

2. Agricultural Biotechnology

o Genetically modified crops, pest-resistant plants, improved yield

3. Industrial Biotechnology

o Production of enzymes, biofuels, biodegradable plastics

4. Environmental Biotechnology

o Bioremediation, waste management, pollution control

4. Scope and Importance

Improves healthcare (insulin, vaccines, monoclonal antibodies) Enhances food production and sustainability Reduces environmental pollution

Drives biotech industries and economy

Diagram:

Gene therapy GM crops Enzymes, biofuels

5. Traditional vs Modern Biotechnology

Feature · Traditional · Modern

Tools Microorganisms, breeding DNA, RNA, enzymes, gene editing

Precision Low High

Applications Food, fermentation Healthcare, agriculture, industrial, environmental

Time Required Slow Fast Bioremediation is a natural, eco-friendly process using living organisms (microbes, fungi, plants) to break down, transform, or remove pollutants from contaminated soil, water, or air, turning harmful substances into less toxic materials like water and carbon dioxide

6. Applications of Biotechnology
7. Medical: Production of insulin, monoclonal antibodies, vaccines
8. Agriculture: Bt cotton, Golden rice, drought-resistant crops
9. Industrial: Biofuels, biodegradable plastics, enzymes in detergents
10. Environmental: Bioremediation of oil spills, wastewater treatment
11. Advantages and Challenges

Advantages:

Increased efficiency and productivity Reduced environmental impact Improved healthcare solutions

Challenges:

Ethical concerns (gene editing, GMOs) Safety issues with genetically modified organisms High cost of modern biotech research

8. Key Terms

Recombinant DNA (rDNA): DNA molecules created by combining genetic material from different sources Genetically Modified Organism (GMO): Organism with altered genetic material Bioprocessing: Using living cells to produce products

Assessment Questions for Topic 001

A. Multiple Choice Questions (24 × 1 mark each)

Q1. Biotechnology primarily involves the use of:

1. Minerals
2. Living organisms
3. Metals
4. Plastics

Q2. The first recombinant DNA product was:

1. Growth hormone