Biochemistry is the combination of the biology and physical chemistry. It is the study of the science of the structure, composition, chemical reactions in the living things. It controls the chemical effects on the living beings. Biochemistry involves molecular biology, bioorganic chemistry, bio in organic chemistry, immune chemistry, biochemistry understand the combination of the chemical compositions in the human genes and finds the individual DNA structure, They perform their work in agriculture, medicine, nutrition and soon. It deals with the enzymes, proteins and soon and also with their structure, chemical combination too. They are applied in the clinical research, forensic science and they are studied micro organism to know the chemical bias and they apply them in drugs, medical problems.