Why is a knowledge of basic chemistry essential to understanding biological principles? Chemistry is a study of the basic, non-living portions of our physical world. Biology is the study of the living. The relationship between these two apparently opposite disciplines has only been emphasized heavily in the last thirty years. Man, in the search for the roots of his existence, has come to believe that ultimately the mechanics of life are explicable in chemical and physical terms. The "whys" of life may never be explained, but the mechanics may be entirely explained in terms of specific and definable chemical interactions. Biology is no longer a science consisting mainly of cataloging and categorizing life forms. Today's emphasis and thrust is in a relatively new direction -- Biochemistry -- the interactions of the unique chemical reactions that are expressed in the miracle we call life. What we are and what we eat can be reduced to chemicals.