How bacteria obtain carbon and energy
All prokaryotes need a carbon source and an energy source to survive, here are the way we classify the unique ways bacteria achieve these vital things into groups.
Carbon sources
1. Autotrophic- organisms that make their own food using an inorganic carbon source (ex-CO2)
2. Heterotophic- organisms that find their food and use an organic carbon source (ex- glucose)
Energy Sources
1. Phototrophic- from light
2. Chemotrophic- from chemicals
Autotrophic bacteria and their energy source
A) Photoautotrophs- bacteria that use light energy with CO2 to make organic compounds (ex- cyanobacteria)
B) Chemoautotrophs- bacteria that use CO2 and energy from inorganic chemicals (ex- H2S, sulfur fixing bacteria)
Heterotrophic bacteria and their energy source
A) Photoheterotrophs- bacteria that use light energy with an organic carbon source (very rare)
B) Chemoheterotrophs- bacteria that consume chemicals with an organic carbon source (ex- E.coli)
All prokaryotes need a carbon source and an energy source to survive, here are the way we classify the unique ways bacteria achieve these vital things into groups.
Carbon sources
1. Autotrophic- organisms that make their own food using an inorganic carbon source (ex-CO2)
2. Heterotophic- organisms that find their food and use an organic carbon source (ex- glucose)
Energy Sources
1. Phototrophic- from light
2. Chemotrophic- from chemicals
Autotrophic bacteria and their energy source
A) Photoautotrophs- bacteria that use light energy with CO2 to make organic compounds (ex- cyanobacteria)
B) Chemoautotrophs- bacteria that use CO2 and energy from inorganic chemicals (ex- H2S, sulfur fixing bacteria)
Heterotrophic bacteria and their energy source
A) Photoheterotrophs- bacteria that use light energy with an organic carbon source (very rare)
B) Chemoheterotrophs- bacteria that consume chemicals with an organic carbon source (ex- E.coli)