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Nitrogen Cycle

To test students competency on the topic 15 Questions.

 
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markey600
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1

What percentage of nitrogen is found in the atmosphere?

  • 4%
  • 16%
  • 79%

2

Which of the organisms below can used free nitrogen directly?

  • legumes
  • humans
  • animals

3

Which of the following can remove nitrogen from the atmosphere?

  • denitrifying bacteria
  • nitrogen fixing bacteria
  • humans

4

Which of the following cannot remove free nitrogen form the atmosphere?

  • lightining
  • nitrogen fixing bacteria
  • denitrifying bacteria

5

Which of the following returns nitrogen into the atmosphere?

  • nitrifying bacteria
  • denitrifying bacteria
  • nitrogen fixing bacteria

6

Which of the following is absorbed by roots of plants?

  • ammonium compounds
  • nitrites
  • nitrates

7

Ammonium compounds are converted to nitrited by which microorganism?

  • denitrifying bacteria
  • nitrogen fixing bacteria
  • nitrifying bacteria

8

Which of the folowing is considered as non-living?

  • nitrogen fixing bacteria
  • denitrifying bacteria
  • lightning

9

One way to improve the nitrate content of the soil for the uptake of plants directly is to add:

  • ammonium compounds
  • industrial fertilizers
  • dead animals

10

When plants and animals die they are broken down by microorganisms to produce:

  • nitrites
  • nitrates
  • ammonium compounds

11

Which of the following is an example of an excretory waste product?

  • free nitrogen
  • urea
  • nitrates

12

Which of the following is a better source of protein?

  • cow
  • soya beans
  • apples

13

Which of the following is a much cheaper source of protein?

  • legumes
  • chicken
  • goat

14

All of the following are microorganisms except:

  • nitrifying bacteria
  • nitrogen fixing bacteria
  • oxides of nitrogen

15

Nitrogen is important for the formation of which food nutrients?

  • carbohydrates
  • protein
  • fat

 

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