bill: identify the structures 1-5 in the prokaryotic cell. · example nitrobacter) photoheterotroph...
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TYPE OF METABOLISM ENERGY SOURCE CARBON SOURCE EXAMPLE
Bacteria that live in the human body (for example E. coli) and all disease causing bacteria.
Nitrifying bacteria use nitrogen from the air as their energy source (for example nitrobacter)
Rare now, but may have been some of the first life on Earth. Mostly marine prokaryotes.
Cyanobacteria live in fresh water, seas, soil and lichen, and use a plant-like photosynthesis which releases oxygen as a by-product.
TYPE OF METABOLISM ENERGY SOURCE CARBON SOURCE EXAMPLE
Chemoheterotroph Organic compounds
Organic compounds
Bacteria that live in the human body (for example E. coli) and all disease causing bacteria.
Chemoautotroph
Inorganic substances such as nitrogen and sulfur
CO2
Nitrifying bacteria use nitrogen from the air as their energy source (for example nitrobacter)
Photoheterotroph Light Organic compounds
Rare now, but may have been some of the first life on Earth. Mostly marine prokaryotes.
Photoautotroph Light CO2
Cyanobacteria live in fresh water, seas, soil and lichen, and use a plant-like photosynthesis which releases oxygen as a by-product.
BILL: WHAT SIMILARITIES DO YOU NOTICE?
•Between “photo…”
•Between “chemo…”
•Between “auto…”
•Between “hetero…”
Prokaryotic metabolism • How do bacteria acquire their energy &
nutrients? – photoautotrophs
• photosynthetic bacteria
– chemoautotrophs • oxidize inorganic compounds
– nitrogen, sulfur, hydrogen…
– heterotrophs • live on plant & animal matter
• decomposers & pathogens
Cyanobacteria •A type of prokaryote with much infolding of the cell membrane
•Capable of performing photosynthesis, which releases oxygen into the atmosphere
CYANOBACTERIA ARE BACTERIA… Which means they have no organelles!!! But, they can do photosynthesis. And, they do have membranes that have folded in. Hmmm… I wonder if this will be important later on in our class….
BILL: Relative to cells without the infolding, how will infolding of the cell membrane change the cells… …Surface area?? …Volume?? …Surface area to volume ratio??