Chapter 10 of Class 12 Biology, Biotechnology and Its Applications, talks about how biotechnology is used in agriculture, medicine, and industries to benefit human life. It explains the role of genetically modified organisms (GMOs), how transgenic animals are made, and how biotechnology helps in fields like gene therapy, vaccine development, and crop improvement. It also discusses biosafety and ethical issues related to biotechnology.
I’m writing about this chapter because it links science with real-life examples that we see around us. Understanding this topic helps students relate textbook knowledge with current events like the use of genetically modified crops, development of new vaccines, and medical advancements like gene therapy. Many times, we hear these terms in the news, but don’t fully understand how they work or where they come from. That’s why this chapter is not just helpful for exams but also for general knowledge. Plus, this PDF version of the chapter from NCERT is free and very useful for CBSE board exam revision, NEET preparation, or school assignments.
What You’ll Learn in Biotechnology and Its Applications – Chapter 10
This chapter focuses on the practical uses of biotechnology in human life. It moves beyond theory and shows how science is applied to solve real-world problems.
1. Applications in Agriculture
Biotechnology has helped in improving crop quality, quantity, and resistance to diseases. One major example is the development of Genetically Modified Crops.
- Bt Cotton: A GMO crop developed by inserting a gene from Bacillus thuringiensis (Bt). This gene produces a protein toxic to insects like bollworms, helping the crop fight pests without the use of chemical pesticides.
- Pest Resistance: Crops like Bt brinjal, Bt corn, etc. have better pest resistance.
- Herbicide Tolerance: Some crops are engineered to survive herbicides that kill weeds.
| Application | Example | Benefit |
|---|---|---|
| Insect resistance | Bt Cotton | Reduces pesticide use |
| Disease resistance | GM Papaya | Resists virus infection |
| Herbicide tolerance | GM Soybean | Easier weed control |
2. Applications in Medicine
Biotechnology has changed the medical field. Many drugs are now made using genetically modified organisms.
- Genetically Engineered Insulin: Human insulin is now made by inserting the insulin gene into bacteria like E. coli, which produce insulin identical to that made in the human body.
- Gene Therapy: A method to correct genetic disorders by inserting a healthy gene. For example, gene therapy has been tried for SCID (Severe Combined Immuno-Deficiency).
- Vaccines: Edible vaccines like those made in bananas and potatoes are being explored.
- Molecular Diagnosis: PCR and ELISA are biotechnological tools used for early and accurate detection of diseases like HIV, cancer, and genetic disorders.
3. Transgenic Animals
Animals that have foreign genes inserted into their DNA are called transgenic animals. These animals are used for:
- Testing safety of vaccines or drugs
- Producing useful proteins like alpha-1 antitrypsin
- Studying human genes and diseases
4. Bioethics and Biosafety
With all the benefits, there are also concerns about using GMOs and modifying genes. That’s why the chapter also discusses:
- Ethical issues like cloning of animals
- Safety concerns of releasing GMOs into the environment
- Need for regulation and guidelines by organisations like GEAC (Genetic Engineering Appraisal Committee)
Important Diagrams to Remember
- Bt Toxin Mechanism in Insects
- Production of Genetically Engineered Insulin
- Gene Therapy Process
- ELISA Principle
Make sure to go through these diagrams and label them properly during revision.
Download PDF – NCERT Class 12 Biology Chapter 10
If you want to download the full chapter for offline use, here’s how to get the official NCERT PDF.
