Biochemistry and molecular biology are one of the most important basic sciences that form a part of general biological sciences. Biochemistry is concerned with the chemical reactions and processes that occur in the living cells and molecular biology is concerned with the processes that occur at the molecular level in living cells such as DNA replication and gene regulation.Both of these two sciences are important for medical students to understand the biochemical and molecular basis of diseases, giving them the essential tools to improve the prognosis of patients by creating new biochemical and molecular control over the cells.Solid foundation of biology and chemistry is important for understanding of these large and complex branches of sciences.Understanding of Biochemistry and molecular biology is the main requirement for medical students to be good scientific researchers and to participate in the advance of medical sciences in the world, revolutionizing the way of understanding of diseases