Nitrogen cycle Flashcards
1
Q
Nitrogen Fixation
A
producing NH3 from N2
Bacteria only-diazotrophs
Nitrogenase enzyme complex
2 enzymes working together
only works when oxygen isn’t there
2
Q
Nitrogenase Enzyme complex equation
A
N2 +8H+8e- +16 ATP to 2nh3+H2+16(ADP+Pi)
bacteria that live in roots
3
Q
Assimilatory Nitrate Reduction
A
Nitrate to ammonia
2 steps
1.Nitrate (NO3-) to Nitrite (NO2-)
Nitrate reductase +NADPH
2.Nitrite (NO2-) to ammonia (NH3)
Nitrite reductase
Animals can’t do
4
Q
Reductive Amination pathway
A
High concentration of ammonia
5C skeleton-a-KG
Transaminases
5
Q
GS-GOGAT system
A
Low concentration of Ammonia
starts with ammonia + glutamate-glutamine
Glutamine synthetase (ATP)
Glutamine +a-KG -2 glutamate
Glutamate synthase (NADPH)
