DNA Structure

DNA Double Helix NASA

With the popularity of many crime scene investigation shows, DNA has become a household term. It is the basic building block for our genetic structure and contains all the information needed for growth, development and reproduction. With the exception of identical twins, each person's DNA is unique. So, what exactly is DNA? DNA or deoxyribonucleic acid is a type of macromolecule known as a nucleic acid. It is shaped like a twisted double helix and is composed of long strands of alternating sugars and phosphate groups, along with nitrogenous bases (adenine, thymine, guanine and cytosine). DNA is organized into chromosomes and housed within the nucleus of our cells.

Learning about DNA can be interesting and fun. Constructing DNA models is a great way to learn about DNA structure, function and replication. You can also discover how to extract DNA from a banana or make a candy DNA model.