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An Overview of Recombinant DNA Technology

CBSE · Class 12 · Biotechnology

Quick revision notes for An Overview of Recombinant DNA Technology — CBSE Class 12 Biotechnology. Key concepts, formulas, and definitions for last-minute revision.

64 questions70 flashcards5 concepts

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A high-level flowchart illustrating the main steps involved in recombinant DNA technology, from isolating DNA from different sources to creating a recombinant organism and producing a desired product.
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Key Topics to Revise

1

Meaning and Scope of Recombinant DNA Technology

  • Recombinant DNA technology means the direct manipulation of nucleic acid or genome of an organism.
  • It is also called genetic engineering.
  • Its main aim is to isolate a desired gene, propagate it, and obtain its product in large quantity.
2

Scientific Foundations Behind rDNA Technology

  • DNA is the principal molecule responsible for the expression of characters.
  • Avery, MacLeod and McCarty demonstrated in 1944 that DNA is the genetic material.
  • Joshua Lederberg discovered plasmids in 1952.
3

Enzymes That Made DNA Manipulation Possible

  • Restriction enzymes act as scissors to cut DNA molecules.
  • Ligase joins two DNA fragments.
  • Werner Arber and Matthew Meselson discovered Type I restriction enzymes in the 1960s.
4

Pioneers and Development of rDNA Technology

  • Stanley N. Cohen had expertise in introducing plasmid DNA into Escherichia coli and in the propagation and cloning of plasmids.
  • Herbert Boyer had expertise in cleaving double stranded DNA to produce single stranded ends with identical termini using restriction enzymes.
  • Stanley N. Cohen and Herbert Boyer developed DNA cloning and rDNA technology in 1973.

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Full Notes

Key Concepts

Recombinant DNA technology is the setGene cloning is the isolationRestriction enzymes act as scissorsLigase joins two DNA fragments togetherStanley Cohen had expertise in introducing

Frequently Asked Questions

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An Overview of Recombinant DNA Technology covers several key topics that are frequently asked in CBSE Class 12 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in An Overview of Recombinant DNA Technology — CBSE Class 12 Biotechnology?
Understand the core concepts first, then work through the 64 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

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Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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