What is DNA?
Deoxyribonucleic acid (DNA) is a two-stranded molecule that carries all the genetic information of an organism (except for some RNA viruses). What makes DNA unique is its ability to copy and store information.
DNA is a key macromolecule required for the continuity of life as it bears hereditary information that is carried on from parents to offspring. It provides instruction for how to make the proteins needed to maintain and build functioning tissues, cells, and organisms.
Origin of DNA
DNA was first identified in the 1860s by Swiss chemist Friedrich Miescher. Decades later, other scientists—notably Erwin Chargaff and Phoebus Levene—performed a series of researches that revealed other essential details about the DNA molecule.
How does DNA Work?
DNA is similar to any data-storing device. The information in DNA is written through adenine (A), thymine (T), guanine (G), and cytosine (C), which are nitrogenous bases of a larger molecule called nucleotide (the building block of DNA). These bases exist in various forms and types and interact with DNA in different ways, thus giving life to an organism.
Where is DNA found in Human Cells?
In human cells, DNA is found in a compartment within the cell called a nucleus. It is known as nuclear DNA.
Does DNA Change over Time?
DNA is a dynamic and adaptable molecule that is constantly changing the process of mutation.