Applications of Recombinant DNA Technology — Study Plan
CBSE · Class 12 · Biotechnology
A step-by-step study plan for Applications of Recombinant DNA Technology, CBSE Class 12 Biotechnology: what to learn first, what to practise and when.
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Learn the Theory
Read the textbook chapter carefully. Note down definitions, formulas and key ideas. Focus on: DNA Fingerprinting, Transgenic Organisms, Gene Therapy.
Practise
Solve the textbook exercises and extra practice questions. There are 79 questions available for this chapter.
Revise & Test
Revise key points without looking at your notes. Take a practice quiz and mark weak areas for another pass.
Spaced Revision
Come back to Applications of Recombinant DNA Technology after a week. Use flashcards for quick recall and try past exam questions on 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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