Elements of general, inorganic and organic chemistry. The macromolecules of biological interest. Carbohydrates, Proteins and Lipids. Carbohydrates metabolism and their regulation (glycolysis, tricarboxylic acid cycle, gluconeogenesis). Metabolism of amminoacids and proteins, metabolisms of lipids. The enzymes. Structure and biochemistry of Nucleic Acids. Integration of metabolism and hormonal regulation.