I still remember when I learned how DNA (Deoxyribonucleic Acid) replication occurs, and it was like a lightning bolt from the sky: it changed my view of the world and a molecular biologist was born. This video uses the latest research to create an animation of how DNA is replicated in a living cell [1:54]
DNA replication is a fundamental process underlying biological inheritance that occurs in all living organisms to accurately copy their DNA. This process occurs through a “semiconservative” mechanism where each strand of the original double-stranded DNA molecule serves as template for the production of a new complementary DNA strand. As the result of DNA replication, two identical DNA molecules are produced from a single double-stranded DNA molecule, each strand containing an original strand of DNA from the parental molecule and a new complimentary “daughter” strand that is bound to it. Cellular proofreading and error-checking mechanisms ensure near perfect fidelity for DNA replication, making less than one error per one billion bases — one thousand times more accurate than the best computer.