Metabolism of prokaryotes

What group does methanogens fall under?

Chemolithoautotrophs

What is the intial electron donor and final electron accepter of methanogens?

Initial: H2

Final: CO2

What waste do methanogens produce?

Methane

Where are methanogens found?

Anoxic environments such as sediments, swamps, animal guts, land fills and geothermal vents

What group does sulfate reducers fall under?

Chemoorganoheterotrophs

What is the intial electron donor and final electron accepter of sulfate reducers?

Initial: NADH

Final: S0 or SO4

What waste do sulfate reducers produce?

Sulfide (H2S)

Where are sulfate reducers commonly found?

In organic-rich muds, ocean sediments, and hot springs

What group does fermenters fall under?

Chemoorganoheterotrophs

What is the intial electron donor and final electron accepter of fermenters?

Does not do ETC, uses glycolysis and TCA

What acts as a terminal electron acceptor for fermenters?

Pyruvate

What do fermenters produce?

CO2, H2, ethanol, lactic acid, etc.

What group does purple sulfur bacteria fall under?

Photoautotrophs

What is the intial electron donor and final electron accepter of purple sulfur bacteria?

Initial: H2S

Final: NADP+

What do purple sulfur bacteria produce?

Internal sulfur granules

Where are purple sulfur bacteria found?

H2S rich environments (e.g. geothermal springs) with light

What group does purple non-sulfur bacteria fall under?

Photoheterotrophy (best), photoatotrophy (2nd), and fermentation (last)

What is the intial electron donor and final electron accepter of purple non-sulfur bacteria?

Does not do ETC, uses glycolysis and TCA

Where are purple non-sulfur bacteria found?

Anaerobic, organic rich sediments with some light

What group does green sulfur bacteria fall under?

Photoautotrophs

What is the intial electron donor and final electron accepter of green sulfur bacteria?

Initial: H2S

Final: NADP+

What do green sulfur bacteria produce?

External sulfur granules

Where are green sulfur bacteria found?

H2S rich environments (e.g. geothermal springs) with very low light levels

What group does green non-sulfur bacteria fall under?

Photoheterotrophy (best), photoatotrophy (2nd), and fermentation (last)

What is the intial electron donor and final electron accepter of green non-sulfur bacteria?

Does not do ETC, uses glycolysis and TCA

Where are green non-sulfur bacteria found?

Deep in microbial mats with very low light levels

What group does cyanobacteria fall under?

Photoautotrophs

What is the intial electron donor and final electron accepter of cyanobacteria?

Initial: H2O

Final: NADP+

Where are cyanobacteria found?

On the surface of oxic sediments with lots of light

What group does sulfur oxidizing bacteria fall under?

Chemolithoautotrophs

What is the intial electron donor and final electron accepter of sulfur oxidizing bacteria?

Initial: H2S or S0

Final: O2

What waste do sulfur oxidizing bacteria produce?

Sulfuric acid (H2SO4)

What do sulfur oxidizing bacteria produce?

Internal sulfur granules

What group does nitrifying bacteria fall under?

Chemolithoautotrophs

What is the intial electron donor and final electron accepter of nitrifying bacteria?

Initial: NH3 or NO2

Final: O2

Where are nitrifying bacteria found?

Soil, fresh water, marine

What group does denitrifiers bacteria fall under?

Chemoorganoheterotrophs

What is the intial electron donor and final electron accepter of denitrifiers bacteria?

Initial: NADH

Final: NO3

What waste do denitrifiers bacteria produce?

N2

What group does hydrogen oxidizing bacteria fall under?

Chemolithoautotrophs

What is the intial electron donor and final electron accepter of hydrogen oxidizing bacteria?

Initial: H2

Final: O2

What waste do hydrogen oxidizing bacteria produce?

H20

Where are hydrogen oxidizing bacteria found?

Fermenters and volcanic vents

What group does chemoorganotrophs fall under?

Chemoorganothrophs

What is the intial electron donor and final electron accepter of chemoorganotrophs?

Initial: NADH

Final: O2

What waste do chemoorganotrophs produce?

H2O