Known to be one of the most important branches of Chemistry, Biochemistry studies the biological structure, composition and chemical reactions at the cellular and molecular level. This covers a range of living organisms such as planta, insects, viruses, microorganisms, etc. Biochemistry is an amalgamation of Biology with Organic, Inorganic and Physical Chemistry. Various topics covered in this subject include issues related to diseases, the chemical basis of heredity and how living organisms derive energy from food.