Biochemistry is the field of science which addresses and examines the molecules required for the existence of life as well as their related interactions and functions pertaining to life processes such as metabolism and protein synthesis.  It is an integration of multiple sciences such as biology and chemistry, as indicated by its name, in addition to genetices, molecular biology, and microbiology.  It differs from these sciences as it is a broad study yet is specific to the physiology of life in all forms including multicellular organisms or eukaryotes and single-celled organisms or prokaryotes.  Such an example is genetics is the study of inheritance and expression of transmitted genetic material which is incorporated into biochemistry by the chemical structure as well as function and interaction of DNA and RNA.