DNA (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). It is organized into structures called chromosomes
and housed within the nucleus
of our cells
. DNA contains the genetic information necessary for the production of other cell components and for the reproduction of life.
Constructing DNA models
is a great way to learn about DNA structure, function and replication.