Cell - Structure and Functions
Kerala Board · Class 9 · Biology
Complete topic list for Cell - Structure and Functions in Kerala Board Class 9 Biology. Key concepts, sub-topics, and what to focus on for board exams.
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Topics in Cell - Structure and Functions
1. Introduction to Cells
- Cells are the basic structural and functional units of all living organisms
- Robert Hooke first observed cells in 1665 using a compound microscope
- Cells can be observed using compound microscopes and electron microscopes
2. Cell Membrane (Plasma Membrane)
- Cell membrane is the outermost boundary of animal cells
- Made up of lipids and proteins in a flexible structure
- Acts as a selectively permeable membrane
3. Cell Wall
- Present only in plant cells, absent in animal cells
- Made primarily of cellulose
- Located outside the cell membrane
4. Nucleus - The Control Center
- Largest and most distinct organelle in eukaryotic cells
- Discovered and named by Robert Brown in 1831
- Controls all cellular activities and functions
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Sources & Official References
- Kerala Board of Public Examinations — keralapareekshabhavan.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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