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Basic Processes

CBSE · Class 11 · Biotechnology

Quick revision notes for Basic Processes — CBSE Class 11 Biotechnology. Key concepts, formulas, and definitions for last-minute revision.

86 questions100 flashcards5 concepts

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Key Topics to Revise

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1. DNA as the Genetic Material

  • DNA determines the trait or feature of any organism except a few viruses.
  • Johann Friedrich Miescher first isolated an acidic substance from nuclei of pus cells and named it nuclein; it contained DNA and protein.
  • Frederick Griffith observed transformation in 1928 while working on pneumonia-causing bacteria.
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2. Prokaryotic and Eukaryotic Gene Organisation

  • Prokaryotic genome is a single, double-stranded circular DNA molecule.
  • Plasmids are extra DNA loops and are not essential for normal growth in prokaryotes.
  • Most bacterial genomes are negatively supercoiled during normal growth.
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3. DNA Replication

  • Watson and Crick proposed the DNA double-helix structure in 1953 and highlighted complementary base pairing.
  • DNA replication is semiconservative: each daughter DNA molecule has one parental strand and one newly synthesised strand.
  • Messelson and Stahl confirmed semiconservative replication in 1958 using 14N and 15N isotopes and density gradient centrifugation in E. coli.
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4. Gene Expression and Transcription

  • Gene expression is the process by which genetic information in DNA leads to the formation of a functional product, usually a protein.
  • The central dogma is the unidirectional flow of information from DNA to RNA to protein.
  • Transcription is the process of making RNA from DNA.

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Full Notes

Key Concepts

DNA determines the trait or featureProkaryotes have a single doubleDNA replication is semiconservativeTranscription is the synthesis of RNAThe genetic code is triplet

Frequently Asked Questions

What are the important topics in Basic Processes for CBSE Class 11 Biotechnology?
Key topics in Basic Processes include Chapter Overview: Basic Processes, Basic Processes - Complete Chapter Concept Map, Correct vs Incorrect: Strand Terminology in Transcription. These are the concepts CBSE Class 11 examiners draw on most — study them first, then practise related questions.
How to score full marks in Basic Processes — CBSE Class 11 Biotechnology?
Understand the core concepts first, then work through the 86 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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All 12 chapters — CBSE Class 11 Biotechnology Revision Notes

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