Unit 5 Nutrient Cycles Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

Why is the nitrogen cycle important and what are the stages

A

•Is important to create nitrogen containing substances such as DNA, RNA, ATP, NADPH, NADH, FADH and Amino acids

  • nitrogen fixation
  • ammonification
  • nitrification
  • denitrification
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What happens in the nitrogen fixation

A

Nitrogen fixing bacteria (from soil or root) converts nitrogen from the air to ammonium ions
N2➡️NH4

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What happens in ammonification

A

Converts nitrogen from decomposition of protein/DNA to ammonium ions

Which is released into soil this is carried out by saprobionts
NH3➡️NH4

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What happens in the nitrification

A

Ammonium ions in soil are oxidised to nitrites then to nitrates by nitrifying bacteria
NH4➡️NO2-➡️NO3-

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What happens in denitrification

A

Converts nitrogen in compounds back to nitrogen gas
Usually anaerobic denitrifying happens bacteria
NO3-➡️N2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly