Anaerobic Respiration Flashcards
- Oxygen is not the final electron acceptor
anaerobic respiration
The final electron acceptor is an inorganic substance other than oxygen i.e.
anaerobic respiration
final electron acceptor in anaerobic respiration
inorganic molecule
final electron acceptor in anaerobic respiration
nitrate ion
sulfate
carbonates
p. aeruginosa final electron acceptor
nitrate ion
Amount of ___ produced varies with type organisms.
ATP
Only part of ___ cycle operate.
krebs
Not all ____ carriers participate.
electron
If O2 is present, the bacteria respire aerobically, and genes encoding proteins necessary for anaerobic respiration are ___
repressed
Many other organisms that carry out anaerobic respiration are obligate ____and are unable to use O2
anaerobes
aerobic terminal oxidase
cyt o
pumps two protons- resulting in more ATP
aerobic terminal oxidase
) as a final electron accepto
nitrate ion
nitrate ion is reduced to ___
nitrite ion, nitrous oxide, or nitrogen gas
if sulfate is the final electron acceptor, it turns into
hydrogen sulfide
if carbonate is the final electron acceptor, it turns into
methane
This also explains why when soil is flooded (and hence, unoxygenated), the ___ added as plant fertilizer replaces oxygen
nitrate
This also explains why when soil is flooded (and hence, unoxygenated), the nitrate added as plant fertilizer replaces oxygen, thus reducing it to ___
nitrite ion, nitrous oxide, nitrogen gas
product of usage of nitrate of plants that they cannot use
nitrite ion
nitrous oxide
nitrogen gas
___of soil then, oxygenates the soil and prevent anaerobic respiration.
tilling
with regards to microorganism, other alternative pathways include:
Pentose Phosphate Pathway (hexose monophosphate shunt)
entner-doudoroff pathway
Breaks down glucose and pentoses
pentose phosphate pathway
Provides intermediate for nucleic acid synthesis (ribulose 5-phosphate), glucose and amino acids (erythrose 4-phosphate)
pentose phosphate pathwawy
pentose phosphate pathway Provides intermediate for ___ ____synthesis (ribulose 5-phosphate), ___ and ___acids (erythrose 4-phosphate)
nucleic acid
glucose
amino acids
Net of 1 ATP for each glucose
pentose phosphate pathway
what bacteria undergo pentose phosphate pathway
Bacillus subtilis
Escherichia coli
Leuconostoc mesenteroides
Enterococcus faecalis
for pentose phosphate pathway, the first intermediate is the
glucose 6-phosphate
for pentose phosphate pathway
what are intermediates not produced in glycolysis
ribulose-5-phoshate
xylulose-5-phosphate
Metabolize glucose without glycolysis or pentose-phosphate
entner doudoroff pathway
Differ in some steps in glycolysis
entner doudoroff pathway
what microorganisms undergo Entner doudoroff pathway
Rhizobium, pseudomonas, Agrobacterium
instead of glucose-6-phosphate to fructose-6-phosphate, it turns into 6-phosphogluconate
Entner-Doudoroff pathway
can all be sources of electrons and protons for respiration.
proteins
carbs
lipids