One way to make the complicated details of DNA structure and function intelligible for children is to compare it to a recipe book. DNA is the master molecule that contains coded instructions for "cooking" the proteins us... More »

The subunit of DNA is called a nucleotide. A nucleotide is the basic subunit in a nucleic acid and consists of a pentose sugar, a phosphate and a heterocyclic amine. More »

Ozone is a compound composed of three atoms of oxygen. At ground level, ozone is harmful because it acts as a pollutant; in the stratosphere, ozone protects the Earth from the harmful ultraviolet rays of the sun. More »

A double helix, or a twisted-ladder shape, is the standard structure of DNA. It consists of two strands of a sugar-phosphate backbone and the nucleotide base pairs adenine, thymine, guanine and cytosine. Adenine pairs wi... More » Science Biology Molecular Biology & DNA

The structure of DNA was discovered by James Watson and Francis Crick. They published their paper "A Structure for Deoxyribose Nucleic Acid" in April of 1953. In 1962, they won the Nobel Prize in Physiology or Medicine f... More » Science Biology Molecular Biology & DNA

Deoxyribonucleic acid, often called DNA, has a primary function of storing the genetic data of the cell. Without DNA, cells could not function and would not be able to replicate to ensure the survival of an organism. More »

Mitochondrial deoxyribonucleic acid (DNA) is found in the mitochondria of a eukaryotic cell; it is composed of 37 genes that are necessary for the mitochondria's function. Nuclear DNA, on the other hand, is found in the ... More »