Compinent 1 Nitrogen Cycle

Question 1

How does nitrogen in the atmosphere become plant protein DNA

Answer 1

Rhizobium-symbiotic bacteria living in root nodules

Nitrogen fixing

Question 2

How does nitrogen in the atmosphere become ammonium

Answer 2

Azobacter- free living bacteria in soil

Nitrogen fixing

Question 3

How does plant protein DNA become animal protein DNA

Answer 3

Eaten

Question 4

How does animal protein DNA become ammonium

Answer 4

Decomposers- fungi and bacteria

Ammonification

Question 5

How does plant protein DNA become ammonium

Answer 5

Decomposers- fungi and bacteria

Ammonification

Question 6

How does ammonium become nitrite

Answer 6

Nitrosomonas

Nitrification

Question 7

How does nitrite become nitrate

Answer 7

Nitrobacteria

Nitrification

Question 8

How does nitrate become nitrogen in the atmosphere

Answer 8

Pseudomonas

Denitrification

Question 9

How does nitrogen in the atmosphere become nitrate in the soil

Answer 9

Lightning

Nitrogen fixing

Question 10

What is nitrogen fixing

Answer 10

Process of N2 in the atmosphere to break apart

Question 11

What is ammonification

Answer 11

Decomposition of amino acids into ammonia and ammonium

Performed by bacteria and fungi

Question 12

What is nitrification

Answer 12

Ammonium ions from purification are converted to nitrites and nitrates by bacteria

Question 13

What is denitrification

Answer 13

Removal of nitrogen from soil

Question 14

What forms of nitrogen are absorbed by plants

Answer 14

Ammonium and nitrate

Question 15

What is azobacter

Answer 15

Free living bacteria in soil

Combines nitrogen with hydrogen to form ammonium ions and ammonia

Question 16

Why are there low levels of nitrates in wetlands

Answer 16

Leaching
Nitrates converted into atmospheric nitrogen
Less nitrification
Anaerobic conditions