DNA Replication

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

Other Talks in the Series: From DNA to Proteins

0:00
DNA replication.
0:03
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.
0:30
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.