Nitrogen Cycle Quiz (WJEC Biology)

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  • Created by: Katy
  • Created on: 10-01-13 11:20
The nitrogen cycle is...
The flow of organic and inorganic nitrogen within an ecosystem
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What do living organisms need nitrogen for?
To make amino acids, proteins and nucleic acid
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How do plants obtain nitrogen?
They take in nitrate ions in solution through their roots
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What are the main processes of the nitrogen cycle?
Putrefaction, Nitrification, Nitrogen Fixation, Denitrification
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The decomposition of dead organisms is called
Putrefaction
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What bacteria are responsible for converting ammonium ions into nitrites?
Nitrosomonas
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Nitrobacter converts ___ into ___?
Nitrites into Nitrates
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Azotobacter is a nitrogen fixing bacteria which is....?
Free living
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An additional souce of nitrogen fixation is...
Lightning
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The relationship of Rhizobium bacteria and the roots of leguminous plants is an example of what?
Mutualism
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Denitrification is...
The conversion of nitrates back to nitrogen
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Denitrification is a particular problem in...
Waterlogged soils with anaerobic conditions
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Other cards in this set

Card 2

Front

What do living organisms need nitrogen for?

Back

To make amino acids, proteins and nucleic acid

Card 3

Front

How do plants obtain nitrogen?

Back

Preview of the front of card 3

Card 4

Front

What are the main processes of the nitrogen cycle?

Back

Preview of the front of card 4

Card 5

Front

The decomposition of dead organisms is called

Back

Preview of the front of card 5
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