1. CHAPTER 2 CELL STRUCTURE AND CELL ORGANISATION

2. 1. Cells - Basic unit of living organism 2
1. Cells - Basic unit of living organism 2. Protoplasm – cytoplasm + nucleus 3. Animal cell – plasma membrane + protoplasm 4. Plant cell – cell wall + plasma membrane + protoplasm 5. Organelles – perform specific functions in cell. 6. Cellular components – cell wall, p.membrane, cytoplasm, organelles

3. Animal cell

5. Plant cell

7. Plasma membrane Separates the content of the cell from environment.
Semi permeable/ partially permeable/ selectively permeable
Elastic/ flexible
Outermost layer of an animal cell

8. Cell wall Outermost layer of a plant cell
Rigid because made of cellulose
Permeable
Provides support for the cell

9. cytoplasm Jelly like substance Medium for chemical reaction
Places organelles

10. Nucleus Controls the activity of the cell Consists of nuclear membrane
nucleolus, nucleoplasm
Contains genetic information
Double membrane

11. Mitochondria Rod shaped Double membrane
Known as the “power house” of the cell
Release ATP energy

12. Chloroplast Disc shaped Double membrane Contains chlorophyll
Conducts photosynthesis

13. Chromoplast Found in plant cells
Contains coloured pigments other than chlorophyll
Found in flower petals, leaves and fruits.

14. Vacuole Only in plant cells Contains cell sap
Membrane is called tonoplast
Maintains turgidity of cells

15. Endoplasmic reticulum (ER)
Continuous with the nuclear membrane
RER surface covered with ribosomes
SER surface not covered with ribosomes
. Rough endoplasmic reticulum (RER) transports protein.
Smooth endoplasmic reticulum (SER) transports Lipids

16. Ribosomes Formed in nucleolus Contains RNA
Found freely in cytoplasm or attached to RER
Involves in protein synthesis

17. Golgi Apparatus Vesicles bud of at its end
Involves in processing, packaging and transporting of proteins/ lipids

18. Lysosome Surrounded by single membrane Only in animal cell
Contains lysozyme
Involves in breakdown of food and bacteria

19. Centrioles Only in animal cell Found near nucleus
Involves in cell division

20. Think!!!!
What are the similarities and differences between the structures of an animal cell and a plant cell?