DNA stores the genetic instructions for building and maintaining an organism. It contains the blueprint for life, determining everything from eye color and hair texture to the susceptibility to certain diseases.

Here's a breakdown of what DNA contains:

* Genes: These are segments of DNA that code for specific proteins. Proteins are essential for all biological processes, such as building tissues, transporting molecules, and regulating cellular activities.

* Non-coding DNA: While not directly coding for proteins, this portion of DNA plays important roles in gene regulation and other cellular functions. Some non-coding DNA regions act as "switches" to turn genes on and off, while others provide structural support for chromosomes.

Essentially, DNA is like a recipe book for life, containing all the information needed to create and maintain an organism.