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Cell : The Unit of Life — Syllabus

CBSE · Class 11 · Biology

What Cell : The Unit of Life covers in CBSE Class 11 Biology: 4 topics, for the 2026-27 session. Part of the CBSE Class 11 Biology syllabus.

98 questions90 flashcards5 concepts

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4 Topics · CBSE Class 11 Biology · 2026-27

Topics in Cell : The Unit of Life

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1. Cell and Cell Theory

  • A cell is the fundamental structural and functional unit of all living organisms.
  • Unicellular organisms perform all life functions within one cell.
  • Multicellular organisms are made of many cells, and cells may specialize for different functions.
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2. Prokaryotic Cells

  • Prokaryotic cells are represented by bacteria, blue-green algae, mycoplasma, and PPLO.
  • They are generally smaller and multiply more rapidly than eukaryotic cells.
  • The four basic shapes of bacteria are bacillus, coccus, vibrio, and spirillum.
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3. Eukaryotic Cells and Cell Organelles

  • Eukaryotic cells are found in protists, plants, animals, and fungi.
  • They have an organised nucleus with a nuclear envelope and many membrane-bound organelles.
  • Plant cells have a cell wall, plastids, and a large central vacuole.
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4. Quick Comparison Points

  • Prokaryotes are smaller and simpler; eukaryotes are larger and more compartmentalised.
  • Prokaryotes lack a membrane-bound nucleus; eukaryotes possess one.
  • Prokaryotes have 70S ribosomes; eukaryotic cytoplasm has 80S ribosomes.

Key Concepts

Central concept: Cell as the fundamental structural and functional unit of life

What is a cellCell theoryOverview of cellProkaryotic cellsEukaryotic cellsCell membraneCell wallEndomembrane system

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Frequently Asked Questions

What are the important topics in Cell : The Unit of Life for CBSE Class 11 Biology?
Key topics in Cell : The Unit of Life include Cell and Cell Theory, Prokaryotic Cells, Eukaryotic Cells and Cell Organelles, Quick Comparison Points. Study these first, then practise questions on each for Class 11 exams.
How should I revise Cell : The Unit of Life for Class 11 exams?
Learn the core ideas first, then work through the 98 practice questions on Cell : The Unit of Life. Revise 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 CBSE Class 11 Biology Syllabus

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