DNA
DNA stands for deoxyribonucleic acid. It is a chemical made up of two long molecules. The molecules are arranged in a spiral, like a twisted ladder. We call this the double helix structure.
There is DNA in the nucleus of every cell. DNA carries genetic information. It has all the instructions that a living organism needs to grow, reproduce and function.
A DNA molecule showing its base pairs, G鈥揅 and A鈥揟