Applications of Recombinant DNA Technology
CBSE · Class 12 · Biotechnology
Step-by-step guide to study Applications of Recombinant DNA Technology in CBSE Class 12 Biotechnology. Topics to cover, practice strategy, and time allocation.
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Learn the Theory
Read the textbook chapter carefully. Note down definitions, formulas, and key concepts.
Practice Problems
Solve textbook exercises and additional practice questions. There are 80 questions available for this chapter.
Revise & Test
Revise key formulas and concepts without looking at notes. Take a practice quiz to test your understanding. Mark weak areas for re-revision.
Spaced Revision
Revisit Applications of Recombinant DNA Technology after a week. Use flashcards for quick recall. Solve previous year questions from this chapter.
What to Focus On
- DNA fingerprinting identifies inherited variation in DNA.
- It is based on VNTR polymorphism.
- VNTRs are subdivided into microsatellites and minisatellites.
- A transgene is a foreign gene introduced into an organism.
- Agrobacterium tumefaciens naturally transfers DNA and is called the Natural Genetic Engineer.
- Particle bombardment uses gold or tungsten particles of 1 µm to 3 µm size.
- Gene therapy repairs faulty genes using correct genetic material.
- The first gene therapy was done in 1990 for SCID caused by ADA deficiency.
- Main approaches are gene replacement, gene inhibition, and gene repair/editing.
Common Mistakes to Avoid
DNA fingerprinting works by comparing the whole DNA sequence of two people.
Microsatellites and minisatellites are the same type of repeat with no important difference.
Agrobacterium tumefaciens is just a harmful plant pathogen and is not useful in biotechnology.
Memory Tips
Sir Alec Jeffreys developed DNA fingerprinting in 1984 at the University of Leicester
99.9% of human genome is same and 0.1% shows inherited variation
VNTR family includes microsatellites and minisatellites
PCR increases sensitivity in DNA fingerprinting by amplifying DNA regardless of amount
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Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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