1. Homeostasis - metabolism
Nutrition Mode
Energy Source
Carbon Source
Photoautotroph
Light
CO2
Chemoautotroph
Inorganic chem
Photoheterotroph
Organic chem
Chemoheterotroph
All of these nutritional modes are found among Bacteria!
No other kingdom is as diverse in its metabolic pathways.

2. Photoautotrophs - photosynthesis
Ancient pathway, but not universal
Cyanobacteria, Algae, Plants
light
CO2 + H2O  O2 + CH2O
chlorophyll
Purple-sulfur bacteria
CO2 + H2S  Ss + CH2O

3. http://www. plantmorphogenesis. bio. titech. ac

6. Chemoautotrophs - N metabolism
Cyanobacteria, Rhizobium - N2 fixation
H+ + ATP + N2  NH4+
Nitrosomonas - nitrification
CO2 + NH4+  NO2- + CH2O
Pseudomonas - denitrification
CH2O + NO3-  N2 + CO2 + H2O √
Which of these processes is demonstrating
chemoautotrophism?

8. Photoheterotrophs - strange
Rhodospirillum, Rhodomicrobium
Light
C2H4O2- + H2O  O2 + CH2O

9. http://www. acadweb. wwu

10. Chemoheterotrophs - strange
Escherichia coli and many others!
CH2O + O2  CO2 + H2O
Carbohydrate, etc. provides both
the energy source
and
the carbon source
What is another chemoheterotrophic organism? Give the complete Latin binomial!

11. Plant mitochondrion outer membrane inner membrane cristae (mesosomes)

12. Chemoheterotrophy Aerobic Respiration CH2O + O2  CO2 + H2O
Glycolysis carbohydrate to pyruvate
Citric Acid Cycle pyruvate to carbon dioxide
Electron Transport Oxidative Phosphorylation
CH2O + O2  CO2 + H2O
Anaerobic Fermentation
Glycolysis to pyruvate
Fermentive step(s) to return NAD+ to glycolysis
C6H12O6  C3H3O3-  C2H5OH + CO2
C6H12O6  C3H3O3-  H3CCHOHCOO-
Notice how fermentation can produce gas or acids…
These are just a few of the fermentive possibilities!