Chapter 11 DNA
DNA) is a nucleic acid containing the genetic instructions used in the development and functioning of all known livingorganisms (with the exception of RNA viruses). The DNA segments carrying this genetic information are called genes. Likewise, other DNA sequences have structural purposes, or are involved in regulating the use of this genetic information. Along with RNA andproteins, DNA is one of the three majormacromolecules that are essential for all known forms of life.