Deoxyribonucleic acid (DNA)
Wold, Marc S. Department of Biochemistry, University of Iowa College of Medicine, Iowa City, Iowa.
Rich, Alexander Department of Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts.
Weeks, Daniel Department of Biochemistry, University of Iowa, Iowa City, Iowa.
Lutter, Leonard C. Molecular Biology Research Program, Henry Ford Hospital, Detroit, Michigan.
Last reviewed:October 2016
Show previous versions
- Genetic variation
- Recombinant technology
- In the cell
- Links to Primary Literature
- Additional Readings
A linear polymer made up of a specific sequence of deoxyribonucleotide repeating units linked by 3′,5′-phosphodiester bonds and acting as the carrier of genetic information. Deoxyribonucleic acid (DNA) [Fig. 1] is the common structure that forms the basic building blocks of life. The set of DNA molecules that contains all genetic information for an organism is called its genome. DNA is found primarily in the nuclei of eukaryotic cells and in the nucleoid of bacteria. Small amounts of DNA are also found in organelles [including mitochondria and cell plastids (chloroplasts)] that contain their own genomes, in autonomously maintained DNAs called plasmids, and in viruses. See also: Cell nucleus; Genetic code; Genetics; Genomics; Nucleic acid; Plasmid
The content above is only an excerpt.
for your institution. Subscribe
To learn more about subscribing to AccessScience, or to request a no-risk trial of this award-winning scientific reference for your institution, fill in your information and a member of our Sales Team will contact you as soon as possible.
to your librarian. Recommend
Let your librarian know about the award-winning gateway to the most trustworthy and accurate scientific information.
AccessScience provides the most accurate and trustworthy scientific information available.
Recognized as an award-winning gateway to scientific knowledge, AccessScience is an amazing online resource that contains high-quality reference material written specifically for students. Contributors include more than 9000 highly qualified scientists and 43 Nobel Prize winners.
MORE THAN 8500 articles and Research Reviews covering all major scientific disciplines and encompassing the McGraw-Hill Encyclopedia of Science & Technology and McGraw-Hill Yearbook of Science & Technology
115,000-PLUS definitions from the McGraw-Hill Dictionary of Scientific and Technical Terms
3000 biographies of notable scientific figures
MORE THAN 19,000 downloadable images and animations illustrating key topics
ENGAGING VIDEOS highlighting the life and work of award-winning scientists
SUGGESTIONS FOR FURTHER STUDY and additional readings to guide students to deeper understanding and research
LINKS TO CITABLE LITERATURE help students expand their knowledge using primary sources of information