Print this Web Links Activity Log to record your findings. In order to view and print these activities, it is necessary to have Adobe Acrobat Reader. If you do not have this, get the free download now.   Click the Techie Toolbox for tips and help to make the most of your time on the Web. Chapter 7: The Chemistry of Life  NDB, The Nucleic Acid Database, Department of Chemistry, Rutgers, The State University of New Jersey The Nucleic Acid Database provides information about the structure of nucleic acids. Follow the link to access this site. How are the nucleotide units of DNA connected? Hydrogen Bonding in Organic and Biochemistry Access this site to learn how hydrogen bonding occurs and its importance in biology. What kind of forces are at work in a hydrogen bond?