Introduction to biochemistry.

Biochemistry is the study of biological processes at the cellular and molecular level by applying principles of chemistry. It emerged in the early 20th century through combining chemistry, biology, and physiology to study living systems. Biochemistry examines the structure and behavior of complex molecules in biological material and how they interact to form cells, tissues, and whole organisms. It also studies the thousands of chemical reactions that occur in cells, how they are precisely regulated to maintain life, and the molecules like carbohydrates, proteins, lipids, and nucleic acids that are common to all organisms.