Bacterial Processes Food SourceRespirationReproduction Favorable conditions Survival.
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Transcript of Bacterial Processes Food SourceRespirationReproduction Favorable conditions Survival.
![Page 1: Bacterial Processes Food SourceRespirationReproduction Favorable conditions Survival.](https://reader033.fdocuments.net/reader033/viewer/2022052916/5a4d1b707f8b9ab0599b53ae/html5/thumbnails/1.jpg)
Bacterial Processes
Food Source Respiration Reproduction
Favorable conditions Survival
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Food Source
• Photosynthesis – make food using sunlight energy
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Food Source
• Chemosynthesis – make food using energy from inorganic chemicals
Hydrogen sulfide
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Food Source
• Parasites – living on or in another living organism
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Food Source
• Saprophytes – live on a dead organism and decompose it
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Respiration
• The breakdown of glucose (food) to release energy
Aerobic Anaerobic
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Respiration
• Aerobic – use O₂
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Respiration
• Anaerobic – don’t use O₂
hydrogen sulfide and methyl mercaptan
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Reproduction
Asexual Sexual
Most bacteria can reproduce either way
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Reproduction
• Asexual – binary fission (split in two) – most common means of reproduction
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Reproduction
• Sexual – produce genetic variety
Conjugation Transformation
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Conjugation
• The exchange of genetic material (plasmids) between 2 cells
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Conjugation Example
• http://www.hhmi.org/biointeractive/bacterial-conjugation
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Transformation
• Absorption of DNA from the environment
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Favorable Conditions
• Warmth• Moisture• Darkness• Food
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Survival
• Endospores – a dormant stage of a bacterium to survive unfavorable conditions
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Advantage over others?
Endospore
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Negative Effects of Bacteria
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Pathogenic – disease causing
Bacterial Diseases of Humans
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Strep throat
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Diptheria
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Staph Infection
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Tetanus
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Gangrene
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Pink Eye
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Acne
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Tooth Decay
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Viral or Bacterial Disease?• Tetanus
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Viral or Bacterial Disease?• Smallpox
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Viral or Bacterial Disease?• Measles
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Viral or Bacterial Disease?• Pinkeye
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Viral or Bacterial Disease?• Warts
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Viral or Bacterial Disease?• Tooth decay
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Viral or Bacterial Disease?• Staph Infection
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Viral or Bacterial Disease?• AIDS
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Viral or Bacterial Disease?• Strep Throat
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Viral or Bacterial Disease?• Mono
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Viral or Bacterial Disease?• Common Cold
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Viral or Bacterial Disease?• Acne
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Bacterial Diseases
• Endotoxins – poisonous chemicals inside the bacteria that aren’t released until the bacteria die
• Example – typhoid fever, UTI
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Bacterial Diseases• Exotoxins – poisonous chemicals released
from living bacteria as waste
• Example – acne, tetanus
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Food Spoilage
• Bacteria eat the food and release bad tasting and/or poisonous chemicals
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Prevention
• Refrigerate, freeze, boil and seal, dehydrate, salt
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Benefits of Bacteria
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Human Body
• E. coli lives in the colon and breaks down food
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Human Body
• Bacteria cover our skin and eat bad organisms
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Fuels
• Bacteria produce alcohol and methane which are burned for energy
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Foods
• Bacteria help make cheese, cottage cheese, and yogurt
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Other
• Clean up oil spills
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Other
• Sewage treatment
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Other
• Make medicines
Insulin
antibiotics