Lecture 17: Microbial Metabolisms Flashcards
what is the sum of all biosynthesis
anabolism
organotroph
reducing power is organic chemicals
Lithotroph
reducing power is inorganic chemicals
heterotroph
carbon source is organic compound
Autotroph
carbon source is CO2
what metabolic class can perform fermentation
chemorganotrophs
homofermentation
produce 1 fermentation product
heterofermentation
produce 2 different fermentation products
what is the role of the organic compound during fermentation
donate & accept electrons
why is fermentation not anaerobic respiration
because there is no respiratory chain
what is the oxidize electron donor
glucose
what is the external electron acceptor
oxygen
what does oxidative phosphorylation yield?
ATP
what does the respiratory chain generate?
PMF
what is the main difference between fermentation & the respiratory chain
fermentation yields a lot less ATP
what type of respiration produces the most ATP
aerobic
aerobic respiration
O2
anaerobic respiration
no O2
what metabolic class can perform respiration
chemolitotrophs
what 4 ions does chemolitotrophy use?
H2S, H2, Fe 2+, NH4+
how does ATP synthase generate ATP in phototrophy
photophosphorylation
oxygenic
produces O2 as an end product
Anoxygenic
doesn’t produce O2 as an end product
what does oxygenic products use as a electron donor?
H2O
photopigment
concentrated clusters of specialized structures (photopigments)
Autotrophy needs to…
need to fix CO2 to accumulate biomass
nitrogen fixation
fixing nitrogen to be used as protein
what do bacteria & archaea fix for agricultural use
N2
what does the calvin cycle yield?
sugar
nitrogen fixation converts ( ) to ( )
N2 - N3
T or F: nitrogen fixation requires energy
true
what does ATPase do?
generates lots of ATP
