1. Cells

2. Cells All living things are made of cells Some have only 1 cell, most are multicellular Most are very tiny Two general types –P–Prokaryotes: no true nucleus –E–Eukaryotes: true nucleus

4. Prokaryotes and Eukaryotes Simple, single celled bacteria & cyanobacteria No true nucleus with a membrane. Chromosome simple ring of DNA not bound to proteins. May also have plasmids. No membrane bound organelles. All other cells – e.g. plants & animals Nucleus has a nuclear membrane. 2 or more chromosomes of DNA wound around proteins & highly folded Membrane bound organelles present – e.g. mitochondria Prokaryote = “before nucleus” Eukaryote = “good nucleus”

5. Prokaryote cells (bacteria)

6. Inside a prokaryote

7. General characteristics of Cells cytoplasm membraneCells consist of jelly-like cytoplasm surrounded by a membrane. nucleusA nucleus sits in the cell organellesmembrane systemsVarious organelles and membrane systems are also present

8. Size and shape Huge variety Related to function

9. Plant cell

10. Animal Cell

11. Cell membrane

12. Nucleus

13. Ribosomes

15. Golgi body

16. What Golgi bodies do

17. Lysosomes

18. Mitochondrion

19. Chloroplast (Plants only)

20. Centriole (Animals only)

21. Cytoskeleton

22. Cytoplasmic streaming Microtubules

23. Centrioles help form the spindle for cell division

24. Cillia and Flagella

25. Cell Wall of plants