Detailed animation of chemical models introduces biology students to chemical concepts that are important to understanding life processes. Defines and illustrates elements, atoms, subatomic particles, molecules, ions and isotopes. Explores ionic and covalent bonds and explains the biological significance. Program turns to an exploration of some important organic molecules”carbohydrates, lipids, proteins and nucleic acids. In a final segment, we explore the structure and function of nucleic acids, DNA and RNA.