I hope that this ppt will help you a lot. This presentation mainly consist of the summary of the chapter Cells in class IX.

1. Cell - StructureCell - Structure
and Functionsand Functions

2. CellsCells
• Smallest living unitSmallest living unit
• Most are microscopicMost are microscopic

3. Discoveryof Cells
 Robert HookeRobert Hooke
Observed sliver of corkObserved sliver of cork
Saw “row of empty boxes”Saw “row of empty boxes”
Coined the term cellCoined the term cell

4. Characteristics of All CellsCharacteristics of All Cells
 A surrounding membraneA surrounding membrane
 Protoplasm – cell contents in thick fluidProtoplasm – cell contents in thick fluid
 Organelles – structures for cell functionOrganelles – structures for cell function
 Control center with DNAControl center with DNA

5. Cell TypesCell Types
• Prokaryotic
• Eukaryotic

6. Prokaryotic Cells
• First cell type on earth
• Cell type of Bacteria and Archaea

7. Prokaryotic CellsProkaryotic Cells
 No membrane bound nucleusNo membrane bound nucleus
 Nucleoside = region of DNA concentrationNucleoside = region of DNA concentration
 Organelles not bound by membranesOrganelles not bound by membranes

8. Eukaryotic CellsEukaryotic Cells
Nucleus bound by membraneNucleus bound by membrane
Include fungi, protists, plant, andInclude fungi, protists, plant, and
animal cellsanimal cells
Possess many organellesPossess many organelles

9. Animal Cell

10. Plant CellPlant Cell

11. Organelles
 Cellular machineryCellular machinery
 Two general kindsTwo general kinds
• Derived from membranesDerived from membranes
• Bacteria-like organellesBacteria-like organelles

12. Cell Walls
►Found in plants, fungi, & many protistsFound in plants, fungi, & many protists
►Surrounds plasma membraneSurrounds plasma membrane

13. Cell Wall Differences
 Plants – mostly cellulosePlants – mostly cellulose
 Fungi – contain chitinFungi – contain chitin

14. Cytoplasm
 Viscous fluid containing organellesViscous fluid containing organelles
 components of cytoplasmcomponents of cytoplasm
 Interconnected filaments & fibersInterconnected filaments & fibers
 Organelles (not nucleus)Organelles (not nucleus)
 storage substancesstorage substances

15. NucleusNucleus
 Control center of cellControl center of cell
 Double membraneDouble membrane
 ContainsContains
– ChromosomesChromosomes
– NucleolusNucleolus

16. Nucleolus
Most cells have 2 or moreMost cells have 2 or more
Directs synthesis of RNADirects synthesis of RNA
Forms ribosomesForms ribosomes

18. Vacuoles
 Membrane bound storage sacs
 More common in plants than animals
 Contents
– Water
– Food
– wastes

19. Bacteria-Like Organelles
 Release & store energy
 Types
 Mitochondria
(release energy)
 Chloroplasts
(store energy)

20. Chloroplasts
Derived form photosynthetic bacteria
Solar energy capturing organelle

21. Photosynthesis
 Takes place in the chloroplast
 Makes cellular food – glucose