1. Viral Reproduction
Lytic Virus: Virus replicates within cell then burst host cell open.

2. Viral Reproduction (con’t)
Lysogenic Virus: Virus inserts DNA, replicates, but DOESN’T destroy host cell.

3. Virus Specificity
Viruses infect a narrow range of hosts because the outer coat.

4. Bacteria: The Prokaryotes
A. Prokaryote: Lack nucleus and membrane-bound organelles; small size; single, circular strand of DNA.

5. Bacterial Shapes B. Cell Shapes: 1. Bacillus – rod-shaped
2. Coccus – round-shaped
3. Spirillum – spiral-shaped

6. Bacteria
C. Anatomy: Cell wall (with peptidoglycan), cell membrane, flagella, ribosomes and DNA.
D. Endospore: A thick coat around DNA and cytoplasm to ‘hibernate.’

8. Bacterial Diseases

10. II. How Bacteria Feed
Autotrophs- Obtain energy from inorganic sources.
1. Photosynthesis – Use sunlight.
2. Chemoautotrophs – Heat vents,
geysers in Yellowstone. Use inorganic
molecules (no C-H bonds) as an
energy source.

11. II. How Bacteria Feed
B. Heterotrophs – Get energy from organic sources.
a. Decomposers – Break down dead matter.
b. Aerobic – Requires oxygen.
c. Nitrogen Fixation – Bacteria in root of
legumes add ‘fertilizer’ to soil.

12. III. Bacterial Disease Pathogen – Disease-causing agent.
Toxins- Some bacteria produce toxins.
Botulism: Improperly canned food.
Food Poisoning: Usually takes 12-24
hours.

13. Botox

14. IV. Antibiotics
Antibiotics: Drugs useful in killing bacteria but not other organisms.