Download Ch19 Bacteria

Survey
yes no Was this document useful for you?
   Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Document related concepts

List of types of proteins wikipedia, lookup

Microbial metabolism wikipedia, lookup

Chemotaxis wikipedia, lookup

Transcript
Monerans:
Bacteria
Friend or Foe
Prokaryotes
Bacteria = Prokaryotes
 Discovered when Robert Hooke and Anton
van Leeuwenhoek invented the microscope
 Bacteria are the smallest living organism
 Unicellular and lack nucleus

Classifying Prokaryotes

2 Different Groups:
– Eubacteria
 Great variety
 Live almost anywhere (land, water, & in humans)
 Cell wall contains peptidoglycan (carbohydrate)
– Archaebacteria
 Chemically different because lack peptidoglycan
 DNA more like that of eukaryotes
 Live in harsh environments (no oxygen, very salty, &
high temperatures)
Identifying Prokaryotes
Identified by Shape, Chemicals in Cell
Walls, Way they Move, & Obtaining
Energy
 Shapes:

– Bacilli = Rod Shaped
– Cocci = Spherical Shaped
– Spirilla = Spiral & Cork-screw
Obtaining Energy

Heterotrophs
– Chemoheterotrophs = take in organic molecules
– Photoheterotrophs = photosynthetic (use
sunlight) & need organic molecules for energy

Autotrophs
– Chemoautotrophs = make organic molecules
from carbon dioxide
– Photoautotrophs = use light energy and water to
carbon compounds and oxygen (like plants)
Living Conditions

Obligate Aerobes = need oxygen to live

Obligate Anaerobes = needs no oxygen

Falcultative Anaerobes = can live with or
without oxygen
Reproduction

Binary fission = cell grows to double its
size, DNA copied, and then splits

Conjugation = DNA exchanged by bridge
that forms and passes on genes

Endospores = spores formed when in bad
conditions to live. Spores are dormant, then
awaken when good conditions
Bad Bacteria

Pathogens = disease causing (i.e. E. coli )
Good Bacteria
Vaccines = preparation of weak pathogen
 Antibiotics = block the regrowth and
reproduction of pathogens
 Decomposers = help the ecosystem
recycle nutrients
 Human Uses:

– Clean oil spills because some digest petroleum
– Purifying water by removing waste products
– Making vitamins
– Foods & Drinks to help Human Body digestion
Bacteria Shakes!!!!

Probiotic Kefir Milk


L. casei
L. acidophiles
L. plantarum
L. rhamnosus
S. diacetylactis
S. florentinus
B. bacterium longum
Leuconostoc cremoris
B. bacterium breve












Lowfat Milk
Ice Cream
Whey Protein
Strawberries
Ice