Review over covalent, hydrogen, and ionic bonding in this article. Learn how molecules are held together by chemical bonds.

What molecules were involved in the origin of life? This series explores the roles of RNA, DNA, and protein. Special attention is given to RNA because of its ability to perform several tasks necessary for life processes. All of the...

Site describes process of photosynthesis, including role of pigment molecules, electron transport, ATP synthesis, and carbohydrate synthesis. Includes links to illustrative graphics.

This is a brief biography on the life and scientific work of Otto Stern, a physicist honored with the Nobel Prize in physics for his "development of the molecular ray method and his discovery of the magnetic moment of the proton."