Water is the most abundant molecule in the body, but it is not a biomolecule. Neither are carbon dioxide, ethanol, or methane. Review the definition of a biomolecule and the structure of these biomolecules compared to glucose and alanine, and explain why glucose and alanine are important and common molecules are not biomolecules.

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By definition a biomolecule is that which is synthesized by a living organism So water carbondioxide ... View the full answer