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…showed last 75 words of 695 total…of amino acids in all proteins is genetically determined by the sequence of nucleotides in cellular DNA. So basically Proteins are basic components in all living organisms. They are complex molecules composed of amino acid and necessary for the chemical processes that occur in living organisms. If not for proteins, we would not be able to function correctly. Each type of protein is used in a different way and each makes every living organism different.