- A: Adenine
- C: cytosine
- C-G: Pair nitrogenous base
- DNA: deoxyribonucleic acid
- G: guanine
- RNA: ribonucleic acid
- T: Thymine
- T-A: Pair nitrogenous base
- U uracil: uracil
- U-A: Pair nitrogenous base
- adenine: bonds with thymine in DNA
- cytosine: bonds with guanine
- deoxyribose: sugar found in DNA
- double helix: the shape of a twisted latter
- nucleotide: chains of subunits made up of sugar, phosphate and nitrogenoous base
- ribose: sugar found in RNA
- uracil: bonds with adenine in RNA