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Biotechnology : Principles and Processes

CBSE · Class 12 · Biology

Quick revision notes for Biotechnology : Principles and Processes — CBSE Class 12 Biology. Key concepts, formulas, and definitions for last-minute revision.

49 questions72 flashcards5 concepts

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A labeled diagram illustrating the setup and principle of agarose gel electrophoresis, showing how DNA fragments separate based on size and charge under an electric field.
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Key Topics to Revise

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1. Meaning and Principles of Biotechnology

  • Biotechnology is the use of living systems, cells, or enzymes to produce useful products and services.
  • Traditional biotechnology includes processes such as making curd, bread, and wine.
  • Modern biotechnology focuses on genetically modified organisms and molecular methods.
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2. Restriction Enzymes and DNA Cutting

  • Restriction enzymes are molecular scissors used to cut DNA at specific locations.
  • They belong to a larger class of enzymes called nucleases.
  • Exonucleases remove nucleotides from the ends of DNA.
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3. Separation of DNA Fragments by Gel Electrophoresis

  • Restriction digestion produces DNA fragments of different sizes.
  • DNA fragments are separated by gel electrophoresis.
  • DNA is negatively charged, so it moves toward the anode.
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4. Cloning Vectors

  • Vectors carry foreign DNA into host cells and help it replicate.
  • Plasmids and bacteriophages can replicate independently inside bacterial cells.
  • Bacteriophages have very high copy numbers per bacterial cell.

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Full Notes

Key Concepts

Biotechnology is the use of livingGenetic engineering is the techniqueBioprocess engineering involves maintaining sterileRecombinant DNA is a new circularThe origin of replication is

Frequently Asked Questions

What are the important topics in Biotechnology : Principles and Processes for CBSE Class 12 Biology?
Biotechnology : Principles and Processes 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 Biotechnology : Principles and Processes — CBSE Class 12 Biology?
Understand the core concepts first, then work through the 49 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

Sources & Official References

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

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