DNA replication

Published on October 1, 2007 Reviewed on January 19, 2016   25 min

Other Talks in the Series: From DNA to Proteins

DNA replication.
DNA is the genetic material of the cell that carries all the information for cell survival and its replication. So every time a cell divides, the DNA needs to be duplicated. During mitosis or meiosis, a parental cell is divided into two daughter cells. And during this process, the DNA is efficiently and faithfully replicated.
The chemical composition of the DNA was known for some time. DNA is a polymer, and it is made of repeating units of phosphate, sugar, and bases. These units are arranged to give the DNA polymer a polarity or directionality. So the DNA chain has a three prime end and a five prime end. The DNA chain also has four kinds of bases, two pyrimidines, cytosine, and thymine, and two purines, adenine and guanine.