3967117
Question 1
Question
Which stage of the nitrogen cycle converts nitrogen gas into nitrogen-containing compounds?
Answer
-
Ammonification
-
Nitrification
-
Nitrogen-fixation
-
Denitrification
Question 2
Question
Which stage of the nitrogen cycle produces ammonia from organic ammonium-containing compounds?
Answer
-
Ammonification
-
Nitrification
-
Nitrogen-fixation
-
Denitrification
Question 3
Question
Which stage of the nitrogen cycle is involved in the conversion of ammonium ions to nitrate ions?
Answer
-
Ammonification
-
Nitrification
-
Nitrogen-fixation
-
Denitrification
Question 4
Question
Which stage of the nitrogen cycle involve denitrifying bacteria which convert soil nitrates into gaseous nitrogen?
Answer
-
Ammonification
-
Nitrification
-
Nitrogen-fixation
-
Denitrification
Question 5
Question
What are the two main types of microorganisms that carry out nitrogen fixation?
Answer
-
Saprobiotic bacteria
-
Free-living nitrogen-fixing bacteria
-
Denitrifying bacteria
-
Mutualistic nitrogen-fixing bacteria
Question 6
Question
What do free-living nitrogen-fixing bacteria do?
Answer
-
Reduce gaseous nitrogen to ammonia, which they then use to manufacture amino acids
-
Turn ammonia into gaseous nitrogen, which they then use to manufacture amino acids
Question 7
Question
Mutualistic nitrogen-fixing bacteria live in nodules of roots and plants e.g. peas and beans
Answer
- True
- False
Question 8
Question
Mutualistic nitrogen-fixing bacteria obtain fats from the plant and the plant acquires amino acids from the bacteria
Answer
- True
- False
Question 9
Question
Soils must be well aerated to prevent the build-up of denitrifying bacteria
Answer
- True
- False
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