Nitrogen is turned into ammonia (NH3) by microorganisms through a process called nitrogen fixation. This ammonia is then used in making amino acids and nucleotides, which are critical building blocks for proteins and DNA, respectively. Therefore, nitrogen is ultimately used in making amino acids and nucleotides.

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Nitrogen Is

Question 33

Multiple Choice

Nitrogen is

A) an important constituent of carbohydrates.
B) primarily fixed by fungi.
C) turned into ammonia by microorganisms.
D) ultimately used in making amino acids and nucleotides.
E) turned into ammonia by microorganisms AND ultimately used in making amino acids and nucleotides.

Correct Answer: