DNA- Structure and function of Deoxyribonucleic Acid (DNA)


In this video we will study about structure and function of DNA. DNA stands for Deoxyribonucleic Acid and DNA is the molecule which is located inside the nucleus of the cell and its main job is store and code the genetic information of the body. For most of the life cycle of the cell the DNA is located inside the nucleus of the cell like a coiled noodle. But during the time when the cell replicates, the DNA is arranged in the form of structure, which are known as chromosomes. And these chromosomes help keep the DNA stable during the time of the cell replication. Now, most of you are familiar with the double helix model of the DNA. The double helix model demonstrates that DNA is basically a polymer. To understand DNA now is a better way you have to understand the definition of a polymer. So the polymer is basically a molecule which is consisting of many repeating units which are known as monomers. If we take the example of a simple polymer called a Starch, in this case the repeating monomaniac units are known as glucose. These glucose molecules are joined together by glucosidic bonds and from the polymer which is known as starch. In a similar way DNA is also a polymer, in this case the monomaniac units which form DNA are known as nucleotides This is the basic structure of a nucleotide. You can see that it consists of three important groups: phosphate, the sugar, and the nitrogenous base. Now if you want to study with the details of the structure of the nucleotides the link to that video will be in the description below But in a nutshell you can conlude that the sugar present inside the nucleotide is called the Deoxyribose which is a five carbon sugar which belongs to the ? The phosphates group consists of a phosphorous ion to which four oxygen atoms are attached and then we have the important nitrogeous bases

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