Bacteria

Text (460-468)LAB (instructions in binder) cheese

VIDEO Bacteria Part I (worksheet in binder)

VIDEO Bacteria Part II (worksheet in binder)

Guided Notes in binder

Vocabulary• endospore, • antibiotic, • anaerobic, • toxin, • capsule, • pili

The study of bacteria Bacteriology• KINGDOM formerly

Monera• Now 2 Domains

Archeabacteria, Eubacteria (more about these later in the

year)

• Only Prokaryotic cells • Only Prokaryotic Domains

Characteristics of

• Prokaryotic Cells– Originated 3.5 bybp– No nucleus– Loop of DNA– Few organelles– No compartments– Very small 1-2µm

• (microns 1/1000 of a millimeter)

• 1/1,000,000 of a meter

• Eukaryotic Cells– Evolved 1.5 bybp– Nucleus- holds the

DNA– Many organelles

• Mitochondria• Chloroplast• Golgi body• Endoplasmic reticulum• cytoskeleton

I. ANATOMYDraw and label cell with the following structures:

pili

flagella

cell membrane

cell wallcapsuleplasmid, cytoplasm

II Common Bacterial SHAPES

Coccus -sphere shaped

Strepto- linear

Staphylo- sheet

Bacillus- rod shaped

PSEUDOMONAS AERUGINOSA BACILLUS ANTRACIS

Spirillum- spiral shaped

Spirillum sp.

Do not write this!

• There are many ways to classify bacteria

• The choice depends on what you are interested in studying– Anatomy?– Physiology?– Harm to humans?– Food source?

Archaebacteria-

• Methanogens –methane producing, found in the gut of animals and swamps

• Extremehalophiles – salt loving, Dead Sea

• Thermoacidophiles – hot springs and geysers with acidic water

Eubacteria

• Recycle nutrients into the soil(break down large molecules “proteins, lipids, carbohydrates”, into simple molecules that can be absorbed by plants)

• Cyanobacteria also called blue green algae, photosynthetic bacteria

III. CLASSIFICATION by how they obtain energy

• Photosynthetic- energy from sunlight– Green sulfur bacteria, cyanobacteria, purple

sulfur bacteria

• Chemoautotrophic- energy from electrons in inorganic molecules– Nitrobacter, nitrosomonas

• Heterotrophic- organic materials from other organisms– Streptomyces, rhizobium

WRITE THIS ON THE BACK OF YOUR BACTERIA DRAWING

IV METABOLISM

• Obligate anaerobes- must live where there is no oxygen

• Obligate aerobes- must live where there is oxygen

• Facultative aerobe or facultative anaerobes- can live in either but prefers one.

V DISEASES

• Clostridium tetani tetanus, produces a toxin ( caused by deep puncture)

Clostridium tetani

• C. botulinum botulism , food poisoning (caused by poor canning) Toxin is odorless and tasteless.

Clostridium botulinum

• Borrelia burgdorferi- Lyme disease (carried by deer ticks) Named for Lyme County Conn.?

Borrelia burgdorferi

Lyme Disease

• Salmonella sp. Food poisoning (associated with eggs and poultry)

• Many different species

Salmonella sp.

• Yersinia pestis- bubonic plague Black Death changed the course of history

• Thought to be carried by rats but actually carried by fleas

Yersinia pestis

Bubonic Plague (BlackDeath)

• Mycobacterium tuberculosum- tuberculosis (infects the lungs) Now there are some drug resistant strains.

Mycobacteriumtuberculosum

USES• Lactobacillus sp. Yogurt,sauerkraut

pickles, vinegar

• Actinomycetes- antibiotics streptomycin» Chemicals that kill other prokaryotic cells

• E. coli- in digestive tracts of humans, used in the manufacture of linen from flax (plant)

• – Excess, wrong location, or wrong species can

be dangerous to humans.

• Rhizobium sp. Associated with the roots of legumes (pod plants) Helps "fix" atmospheric nitrogen into the plants to help make proteins. Enriches soil, plants are high in protein.

• Tanning leather, silage (fermented hay increases protein content) “silo”

VII ENVIRONMENTAL FACTORS THAT INFLUENCE GROWTH

• Temperature up or down

• light

• Oxygen present

• amount of wastes

• Food availability

• presence of chemicals (salt)

• Amount of water

COMPETITION (secrete toxins)

• Endotoxins- part of the cell wall is poisonous

• Exotoxin- chemicals poison is released

VIII LEVELS OF CLEANING• Refrigeration SLOWS GROWTH

• Antiseptic PREVENTS GROWTH

• Disinfectant DEATH OF PATHOGENS IN A MEDIUM

• Sterile REMOVES ALL FORMS OF LIFE

• Pasteurization DESTRUCTION BY HEAT OF DISEASE CAUSING ORGANISMS FROM BEVERAGES

IX METHODS OF CLEANING

• MECHANICAL• CHEMICAL• RADIATION• TEMPERATURE AND PRESSURE• (AUTOCLAVE)• ENDOSPORE – protoplasm of bacteria

cell becomes encased in a spore coat. Protects from environment -250 C to over 100 C

X FOOD SPOILAGE AND PRESERVATION

• CANNING

• SALT CURING

• DEHYDRATION

• QUICK FREEZING

• RADIATION

• VACCUM PACKAGING

• CHEMICAL PRESERVATION

Test Topics FOR Tuesday• Video Bacteria I and II worksheets

• Lab results (cheese, bacteria cultures)

• Notes on Anatomy, classification, diseases, uses, preservation of food and cleaning

• Text (460-468) Vocabulary 16-19

• Bacteria word search

NOTEBOOK CONTENTSDue Tuesday (next test day)

• C.S.• A.S.• G.S. • Vocabulary 1-19• Notes• Labs

– Geo Time Scale– Microscopy– Biome Research– Bioethics– Cheese Making– Bacteria Cultures

• Daily Work– Text Ques pg. 9 + 22– Analyzing sci words– Branches of Biology– Chap 12.1– Chap 12.2– IV and DV worksheet– Biome Measuring– Bacteria Video Part I– Bacteria Video Part II– Bacteria Word

Search

• Systems

Bacteria Jeopardy QuestionsEasy 1. Name the shapes of bacteria:2. Name 3 diseases that bacteria can cause:3. Name 3 non-dairy products of bacteria:4. What is the highest form of cleanliness?5. What are antibiotics used for?6. Where would you find a thermophilic bacteria?7. Name the salt loving bacteria.8. Bacteria that causes lock jaw?9. What does flagella do?10. What does refrigeration do to bacteria growth?11. What is the purpose of an endospore?12. What does obligate aerobe mean?

Bacteria Jeopardy QuestionsEasy - Answers1. Bacillus, coccus, spirillum2. Ecoli poisioning, tetanus, botulism, lyme disease, salmonella,

bubonic plague, tuberculosis, staph infection, scarlet fever, typhoid fever, cholera,

3. Linen, sourdough bread, wine, sewage treatment, antibiotics, helping plants grow (nitrogen fixing), Botox

4. sterilization5. to inhibit bacteria from reproducing6. Yellowstone (hot and acidic environment)7. Halophile 8. Clostridium tetani9. Aid with movement of bacteria10. Slows growth11. Protects bacteria from harsh environment12. Must live in presence of oxygen

Medium

1. Name the ability to live with or without oxygen.

2. What type of plants have bacteria in their roots? What do they do?

3. Name 3 factors that influence bacterial growth:

4. What was the “black death”? What spread it?

5. Leading all time pathogen killer?

6. Describe 2 main features of the first bacteria.

7. What does an autoclave do?

8. Name 3 ways we preserve food.

9. What are bacterial pilli used for?

10. Do bacteria have DNA? If yes, in what form?

Medium - Answers1. Facultative anaerobe2. Legumes…the bacteria help fix nitrogen into the

plants to help make proteins for the plant3. Temperature, oxygen presence, food availability,

water, light, amount of wastes, chemicals present4. Bubonic plague…carried by fleas (not rats)5. tuberculosis6. No nucleus, few organelles, very small and simple7. Uses temperature and pressure to kill all forms of life8. Canning, freezing, refrigeration, salt curing,

dehydration, chemical preservation, radiation9. Sticking to surfaces10. Yes, in plasmid or nucleoid form

Difficult1. What is an endospore? How do we destroy

them?2. Draw a bacteria with all its features.3. Why are some bacteria antibiotic resistant?4. First antibiotic discovered? By whom? 5. Why do some bacteria produce antibiotics and

yeast produce alcohol?6. E. coli is in your intestines. Why does it help

you there and harm you in other areas of the body?

7. Why are some beverages pasteurized? How is it done? Who invented it?

Difficult - Answers

1. Protoplasm of bacterial cell becomes encased in a spore coat…very hard to kill…you have to autoclave to kill

2. Look at Slide # 5 of this presentation

3. Random mutations that occur

4. Penicillin…Alexander Fleming…penicillin comes from a mold or fungus

5. It is their specific waste product

6. There are different strains of E.coli and they all are different. In some strains, they are okay for the body…in some strains…they can harm the body.

7. It destroys microbes by heat…in things like milk, juices, wines, and malt beverages. Louis Pasteur