Definition:-

           Biochemistry is the branch of chemistry which deals with the study of the structure, composition and chemical reactions of substances in living systems. 

                                         OR

Biochemistry, sometimes called biological chemistry. It is the study of chemical processes involved in living organisms.

Explanation:-

              Biochemistry emerged as a separate discipline when scientist combined biology with organic, inorganic and physical chemistry and began to study such topics as how living things obtain energy from food, the chemical basis of hereditary and what fundamental changes occur in disease. Biochemistry includes the sciences of molecular biology, immuno chemistry, neuro chemistry, bio organic chemistry, bio inorganic chemistry and biophysical chemistry. Biochemistry governs all living organisms and living processes.

 3. Scope of Biochemistry :-   

People who seek career in the field of biochemistry are referred as Biochemists. Biochemist mainly study the structures and functions of enzymes, proteins, carbohydrates, fats, process of metabolism and the molecular basis of the action of genes.

• Biochemists unusually involved in research related works.
• Works in Drug Manufacturing Companies 
• Public health care 
• Blood service
• Industrial laboratories
• Cancer Research Institute 
• Forensic Science 
• Hospitals 
• Cosmetic Industries 
• Environmental Pollution Control 

    . Educational Institutes

JOB TYPES:

• Research Scientist
• Clinical Scientist
• Research Associates 
• Chemist Microbiologist 
• Biomedical Scientist
• Pharmacologist Laboratory Technician 
• Lecturer in an Educational Institution 

4.HISTORICAL INFORMATION :-

1. In 1828 the scientist name Wohler synthesized a biological compound or Organic compound (Urea) from Inorganic compound (Ammonium Cyanite).

2. In 1897 the Buchner brothers (Eduard and Hans) demonstrated that alcoholic fermentaion could occur in a cell-free extract.

3.In 1926 J. B. Sumner demonstrated that an enzyme (Urease) was a protein and could be crystallized (indicative of fixed molecular structure and purity) set stage for Perutz and Kendrews works on X-ray structure of Myoglobin and Hemoglobin Nucleic acid polymers (DNA and RNA). Another series of discoveries surrounding Nucleic acids : Miescher, Mendel, Avery, McCarty and McLeod, Watson and Crick, Hershey and Chase.