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Significance of water-nitrogen and carbon

Write down the respective significance of water, nitrogen and carbon for living beings?

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Water is the major solvent of living beings and it is essential practically for all biochemical reactions, comprising as reagent of photosynthesis. Many properties of water are extremely significant for life.

Carbon is the major chemical component of the organic molecules; carbon dioxide is as well the reagent of photosynthesis and product of energetic metabolism of living beings.

Nitrogen is an essential chemical element of the amino acids, the building blocks of proteins which in their turn are the major functional molecules of living beings; nitrogen is as well part of nucleic acid molecules, the basis of reproduction, protein synthesis and heredity.

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