Nitrogen Cycle

Question 1

Why is nitrogen so important? For plants

Answer 1

For plants to make RNA , DNA , amino acids and proteins

Question 2

Why is nitrogen so important? For animals

Answer 2

To obtain plant protein and make animal protein

Question 3

What is needed to turn N2 into nitrate (not nitrifying bacteria)

Answer 3

High energy levels such as forest fires , lightening

Question 4

How is nitrate (NO3-) manufactured in factories?

Answer 4

Haber-Bosh process

Question 5

Why is full nitrification necessary?

Answer 5

Because ammonia and nitrite (NO2-) is toxic for plants

Question 6

Where is nitrifying bacteria found?

Answer 6

In the root nodules of legumes

Question 7

Name the family of plants which have a symbiotic relationship with nitrogen fixing bacteria

Answer 7

Legumes

Question 8

What process keeps N2 gas constant in the atmosphere?

Answer 8

Dentryifing bacteria

Question 9

Nitrogen fixation

Answer 9

Converts N2 into nitrates to be used by plants

Question 10

What role does bacteria play in the nitrogen cycle?

Answer 10

Nitrogen fixation
Denitrifying bacteria

Question 11

Centring bacteria

Answer 11

Turns nitrates into N2 gas

Question 12

What’s the process of decay and urea Turing into ammonia?

Answer 12

Ammonification

Question 13

What’s the process in which plants absorb nitrates? (NO3-)

Answer 13

Assimilation

Question 14

What’s the process of ammonia getting turned into nitrite?

Answer 14

Nitrification

Question 15

What’s the process of nitrite turing into nitrate?

Answer 15

Nitrification

Question 16

What’s the process in which nitrate is turned back into N2 gas ?

Answer 16

Denitrification

Question 17

How do animals contribute to ammonification?

Answer 17

Excretion of urea