ELI5: Explain Like I'm 5

nucleic acid sequence

Nucleic acid sequences are like sentences made up of different letters. They're used to tell us what molecules our bodies are made of and how they work. Different molecules are made of different combinations of these letters, which make up the nucleic acid sequences. For example, our DNA is made up of a sequence of the letters A, C, G and T, which tell our bodies how to make the proteins we need to stay alive and healthy.