1. Introduction To Cells

2. History & Definition
First cells seen where cork cells in 1665 by Robert Hooke.
A cell is the smallest unit that can still carry on all life processes.
Ex. Red blood cells, nerve cells

3. Cell Theory All organisms are composed of one or more living cells
The cell is the basic unit of life in all living things.
All cells come from existing cells. (chicken or the egg?)

4. Cell Similarities All Have cell membrane
Contain hereditary material (DNA)
Have Cytoplasm and Ribosomes
Are small in size
Most cannot be seen with naked eye
Ostrich egg

5. 2 Main Types of Cells Prokaryotic Include bacteria
Do NOT have a nucleus
Have long circular DNA
No membrane bound organelles
Contain ribosomes to make proteins.
rod shaped, spherical, and spiral

6. Prokaryotic Cells: Bacteria
Reproduction: Usually Asexual
Binary Fission: an organism duplicates its DNA and then divides into two parts, with each new organism receiving one copy of DNA.
Conjugation: Exchange of DNA between bacteria (not Asexual)

7. Prokaryotic Cells: Bacteria
Either classified as eubacteria or archaea.
Eubacteria: commonly found
Archaea: Live in extreme environments

8. Prokaryotic Cells: Bacteria “The Good”
Bioremediation: organisms are added to water to convert toxic pollutants, such as oil, into harmless substances.
Food Production: Butter, Cheese, Yogurt, Sauerkraut, Beer, Pickles, Olives, Chocolate, Coffee, Soy sauce, meats, etc.
Decompose dead organisms
Digesting food
Fix Nitrogen for Plants

9. Prokaryotic Cells: Bacteria “The Bad”
Food Spoilage
Can cause disease in plants and animals
Produce Toxins

10. Prokaryotic Cells: Bacteria “The Ugly”
Must be dealt with every day.
People die each year from infections.
Bubonic Plague:
Killed 2 out of 3 patients in 2-6 days without treatment
Yersina pestis
Anthrax

11. Prokaryotic Cells: Bacteria
Ways to prevent disease:
Wash hands!!!
Cook food thoroughly.
Keep foods cold.(slows metabolism)
Antibiotics

12. 2 Main Types of Cells Eukaryotic (YOU!)
More complex & larger than proK
Have membrane bound organelles
Has a nucleus
Has more DNA than proK
DNA is linear
Animal, plant, fungi
NOT BACTERIA

14. Cell Movement Flagella: tail-like projections Pseudopod: false-foot
Cilia: finger-like projections (some non-motile)