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Asked by  | 16th Feb, 2009, 02:39: PM

Expert Answer:

Nitrogen occurs in all living organisms. Nitrogen is an essential part of amino acids  and thus of proteins,  and nucleic acids (DNA and RNA), both of which are essential to all life on Earth.

It resides in the chemical structure of almost all neurotransmitters, and is a defining component of alkaloids, biological molecules produced by many organisms.

Answered by  | 16th Feb, 2009, 11:32: PM

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