Cell : The Unit of Life — Chapter Summary
CBSE · Class 11 · Biology
Summary of Cell : The Unit of Life for CBSE Class 11 Biology. Part of the CBSE Class 11 Biology syllabus. The cell is the basic structural and functional.
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Overview
The cell is the basic structural and functional unit of all living organisms. Living things may be unicellular or multicellular, but all are made of cells or aggregates of cells. The discovery of the cell became possible after the invention and improvement of the microscope. Antonie Von Leeuwenhoek
Key Concepts
A cell is the smallest unit
A cell is the smallest unit that can perform all essential life processes independently. Unicellular organisms carry out life functions within a singl
Matthias Schleiden observed that all plants
Matthias Schleiden observed that all plants are made of cells. Theodore Schwann studied animal cells and concluded that animals and plants are made of
Prokaryotic cells are found in bacteria
Prokaryotic cells are found in bacteria, blue-green algae, mycoplasma and PPLO. They are smaller, lack a well-defined nucleus, and do not have membran
Eukaryotic cells are found in protists
Eukaryotic cells are found in protists, plants, animals and fungi. They have a true nucleus surrounded by a nuclear envelope and contain membrane-boun
The plasma membrane is selectively permeable
The plasma membrane is selectively permeable and mainly made of lipids and proteins. In the fluid mosaic model, lipids form a bilayer and proteins can
Learning Objectives
- Understand why the cell is called the unit of life
- Describe the main ideas of cell theory and its development
- Distinguish between prokaryotic and eukaryotic cells
- Identify major cell organelles and their functions
- Explain the structure and function of the cell membrane
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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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