Energy Sources
Heterotrophy vs. autotrophy
Saprotrophic
Electrons and bonding
bonds require energy--breaking releases energy
AMP + high energy phosphate = ADP
ADP + high energy Phosphate = ATP
iron, copper, zinc,
chemotrophic
phototrophic
reducing environment (CO2, H2O, methane) anaerobic metabolism
fermentation
photosynthetic revolution
oxidizing environment (aerobic metabolism)
electron transport system (ETS)
oxidative phosphorulation
prokaryotes--
prokaryotes engulfing prokaryotes and forming symbiotic relationships to produce eukaryotes
Lynn Margulis--symbiotic origin of the eukaryotes
cell size
diffusion