9. Proteins.pdf - Untitled Document 1 of 3 https/lms.virtualhighschool.com/content/OSSD-v2/Department/Scien Listen Proteins Proteins are extremely

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Proteins Proteins are extremely important polymers - they are specific to the species and the individual. Proteins have an incredible variety of functions in living organisms. The functions of proteins include, but are not limited to: acting as biological catalysts or enzymes, which enable chemical reactions in the cell to occur; forming structural parts of organisms such as hair, tendons, fish scales, silk, etc.; participating in cell signal and recognition factors; acting as molecules of immunity. Proteins are natural polymers composed of long chains of amino acids linked together by amide bonds. They perform a number of vital functions and are necessary for the existence of all living organisms. Amino acids are the monomer subunits that polymerize into polypeptides and proteins. They consist of an amine group, a carboxyl group and a side chain. The structure of the side chain determines the properties of the amino acid.
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