Free Physiology Essays
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Essay on the Chemicals of Life
All biological organisms are made up from a series of closely related chemicals, all derived from the atoms carbon, oxygen, hydrogen and nitrogen. Indeed it is the presence of the atom carbon that distinguishes organic (living) matter from inorganic (non-living) matter. Very few inorganic materials contain carbon, whilst all organic materials do. The constituent atoms make up a series of molecules of varying sizes and complexities. Depending on the configuration of the atoms these can form proteins, fats, carbohydrates and nucleic acids. …
