1. Cell Theory The cell is the basic unit of life
All organisms are composed of one or more cells.
All cells come from pre-existing cells.

2. What does a cell look like?
Draw and label what you can remember about a cell.
There are no wrong or right answers

3. Is this what you remember?

4. The Two Types of Cells

5. Today’s Lesson Focuses On:
Prokaryotic Cells
Eukaryotic Cells
The differences between prokaryotic and eukaryotic cells
Organelles and their functions

6. Prokaryotic Cells

7. Prokaryotic Cells: Lack a nucleus
Cell’s DNA floats in the middle of the cell.
Do not have organelles
They do have ribosomes.
Are also known as bacteria.

8. Eukaryotic Cells

9. Eukaryotic Cells

10. Eukaryotic Cells: 10 time larger than prokaryotic cells
Include: plant, animal, fungi, and protists
Have a nucleus and many other membrane-covered organelles
DNA is stored in the nucleus of the cell
The DNA molecules are linear
All eukaryotic cells have a cell membrane
Some have a cell wall

11. Comparison of The Two Types of Cells
Prokaryotic Cells
Eukaryotic Cells

12. Comparison of The Two Types of Cells
Prokaryotic Cells
No nucleus
No membrane-covered organelles
DNA floats around (circular)
Bacteria
Eukaryotic Cells
Nucleus
Membrane-covered organelles
DNA in nucleus (linear)
All other cells ( plant, animal, fungi, protists)

13. Animal DNA – Double Helix

14. Eukaryotic Cells: The Inside Story

15. Eukaryotic Cells What is an organelle?
An organelle is a structure within a cell, sometimes surrounded by a cell membrane.
They are structures that allow the cell to live, grow, and reproduce.

16. Organelle’s and Their Functions
Nucleus
Contains the cell’s DNA and is the control center of the cell

17. Organelle’s and Their Functions
Chloroplasts
Make food using energy from the sunlight

18. Organelle’s and Their Functions
Golgi Bodies
Processes and transports materials out of the cell

19. Organelle’s and Their Functions
Vacuole
Stores water and other material

20. Organelle’s and Their Functions
Lysosomes
Digestive system for cell

21. Organelle’s and Their Functions
Mitochondria
Break down food molecules to make ATP (energy)

22. Organelle’s and Their Functions
Endoplasmic Reticulum
Breaks down lipids, drugs and other substances, packages up proteins for release from the cell

23. Organelle’s and Their Functions
Ribosomes
The site where amino acids are hooked together to make proteins

24. Cell Wall .

25. Cell Wall
Only found in plant cells and bacteria (prokaryotic cells).
They are tough, outer coverings that protect the cell and give it shape

26. Cell Membrane Protective layer around all cells.
It allows things to come in and out of the cell.
( Like a flood gate)
Made of a phospholipid bilayer

27. Cell Membrane