BILL: Identify the structures 1-5 in the prokaryotic cell.
1
2
3
4
5
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 byproduct.
TYPE OF METABOLISM
ENERGY SOURCE
Chemoheterotroph
Organic
compounds
Chemoautotroph
Inorganic
substances such
as nitrogen and
sulfur
Photoheterotroph
Photoautotroph
Light
Light
CARBON SOURCE
Organic
compounds
EXAMPLE
Bacteria that live in the
human body (for example
E. coli) and all disease
causing bacteria.
Nitrifying bacteria use
CO2
nitrogen from the air as
their energy source (for
example nitrobacter)
Organic
compounds
Rare now, but may have
been some of the first
life on Earth. Mostly
marine prokaryotes.
CO2
Cyanobacteria live in
fresh water, seas, soil
and lichen, and use a
plant-like
photosynthesis which
releases oxygen as a byproduct.
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
CHEMOHETERTROPH
CHEMOAUTOTROPH
PHOTOAUTOTROPH
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??
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