1. The Good, the Bad and the Ugly!
Bacteria
The Good, the Bad and the Ugly!

2. What are prokaryotes?
Single celled organisms that DO NOT have membrane bound organelles.

3. 3 Common Bacterial Shapes
Sphere Shaped  Coccus
Rod Shaped  Bacillus
Spiral Shaped  Spirillum

4. 3 Common Bacterial Shapes

5. 2 Domains all Prokaryotes Belong to:
Domain Archaea
Domain Bacteria

6. Domain Archaea Kingdom Archaebacteria
Mostly found in EXTREME Environments
Salt Lakes / Hot Springs / etc

7. Domain Bacteria Can be found virtually EVERYWHERE!!!
100,000 found on 1 sq in of your skin!

8. Bacterial Structure Genetic Material  DNA
Bacterial DNA is a single chromosome clustered in a mass called a nucleoid.

9. Bacterial Structure Plasmids Other non-membrane bound structures?
Small, circular extra loops of DNA
Other non-membrane bound structures?
Ribosomes, enzymes, nutrients

10. Bacterial Structure Outside Cell Membrane? Cell wall made of?
Rigid cell wall – 1 or 2 layers thick
Cell wall made of?
Peptidoglycan
Outside cell wall of some?
Additional membrane

11. Up Close: E. coli
                      

12. Identifying Bacteria
Techniques Used to ID Bacteria
Gram Staining

13. Gram Positive Thick layer of peptidoglycan / no outer membrane
EASIER to Kill!!!
Stain PURPLE

14. Gram Negative Thin layer peptidoglycan / outer membrane present
HARDER to Kill!!!
Stains Pink

15. Obtaining Energy Photoautrotrophs Chemoautotrophs Heterotrophs
Use SUNLIGHT for energy
Purple & Green Sulfur Bacteria
CYANOBACTERIA
Chemoautotrophs
Get energy from Inorganic Sources (CHEMICALS) in their environment
Heterotrophs
Feed on DEAD organisms
Paratites / Pathogens (Feed on LIVING stuff)

16. Asexual Reproduction Binary Fission
A single cell divides into two identical cells
(MITOSIS)

17. Sexual Reproduction Conjugation
Occurs when two bacteria join to exchange DNA
Connect through Pili

18. Endospores
Thick walled structures that surround DNA & cytoplasm, protecting bacteria from harsh conditions

19. Vital Role of Bacteria Produce Oxygen
Convert Nitrogen to useable form for Plants (matter cycles)
DECOMPOSERS!!!
Food we eat!

20. Helpful in Industry/Research
Produce Chemicals (Acetone)
Clean up oil spills / sewage
Produce human proteins

21. Causing Disease Producing Toxins Clostridium botulinum
Botulism toxin causes food poisoning
Used in Botox

22. Destroying Body Tissue
Causing Disease
Destroying Body Tissue
Staphylococcus
Flesh Eating Bacteria

23. Destroying Body Tissue
ANTHRAX
CHLAMYDIA
GONORRHEA

24. Antibiotics
Chemicals that inhibit the growth of or kill microorganisms.
Conjugation & Natural Selection spreads antibiotic resistance (MRSA)