Microbial Metabolism - overview Flashcards
metabolism definition
biochemical processes that occur within a cell
two basic forms of metabolism
catabolism
anabolism
catabolism (4)
breaking down processes:
oxidation of chemicals, releasing energy and excretion of waste products
anabolism
building up processes:
consuming energy and nutrients to create larger, more complex molecules
3 sources of energy for cells
organic chemicals, inorganic chemicals, light
how is energy liberated?
oxidation
what does a cell do with liberated energy?
stores in compound called ATP
prefixes for energy transformation and their source
chemo - energy from chemicals
photo - energy from light
prefixes for type of chemicals used to transform energy
organo - uses organic chemicals to transform energy
litho - uses inorganic chemicals to transform energy
prefixes for carbon source that is transformed
hetero - organic carbon present in the environment
auto - takes inorganic carbon from the environment, reduces it to organic carbon (carbon fixation) that it can then use
heterotroph by itself means….
chemoorganoheterotroph
PED
primary electron donor (reduced reactant)
TEA
terminal electron acceptor (oxidized reactant)
on electron tower, what order are the pairs listed?
oxidized/reduced
mechanisms for energy conservation
respiration
fermentation of organic PED
respiration TEA
inorganic and from environment (O2, sulfate, Fe3+)
(external nutrient)
fermentation TEA
organic and produced&retained in the cell
(internal biomolecule)
result of fermentation on PED
not completely oxidized, left overs are reduced waste products that are extruded to environment
how are pairs on electron tower related
related elements (CO2/organic carbon, proton/hydrogen gas, sulfate/sulfide)
Syntrophy
one species living off the waste products of another species
4 things to do when given a redox reaction
identify TEA
identify PED
respiration/fermentation?
identify waste products
What 2 things does only one organic carbon as a reactant signify?
fermentation
TEA is some internal organic molecule
