lecture 19
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Organisms that obtain energy fro the oxidation of inorganic compounds
Chemolithotroph
Carbon can come from inorganic molecules ____ or from organic molecules ____
Chemolithoautotrophs/mixotrophs
____ is the key to understanding chemolithotrophy (and life)
Thermodynamics
Most ____ strategies rely on oxidation-m reduction (redox) reactions
Catabolic
____ of ____ requires reducing power- ither from e- doner directly or can be dereived by running the e- transport chain in reverse (reverse e- flow) to produce NADH or reduce ferredoxin
Reduction of CO2
REduction of CO2 into biomass is called ____ or ____
Carbon fixation/primary production
Calvin Cycle, rTCA, 3-hydroxypropionate, 4- hydroxylbutyrate, and acetyl Co-A
Reduction of CO2 pathways performed by microbes
Hydrogen gas is derived from ____ or from geologic processes
Fermentation
Hydrogen oxidation Two redox states
Reduced H2- redox state0 Oxidized H2O- redx state +1 H2+!/2 O2-> H2O
Hydrogen oxidation Catalyzed by the enzyme
Hydrogenase
Many hydrogen chemolithotrophs have two or more hydrodgenase for either ____ or ____Hydrogenase splits h2 into
2H+ and 2e-
e- flow through quinone pool to ____ and to ____
cytochromes/TEA
____ iron is present in anaerobic water and acid water
Ferrous