1. Deoxyribose Sugar: This is a five-carbon sugar that forms the backbone of the DNA molecule.

2. Phosphate Group: This is a negatively charged molecule that attaches to the deoxyribose sugar.

3. Nitrogenous Base: This is a molecule that contains nitrogen and is responsible for carrying genetic information. There are four types of nitrogenous bases in DNA: adenine (A), guanine (G), cytosine (C), and thymine (T).

These three components are linked together to form a single nucleotide. The nucleotides then connect to each other to form the long chains that make up DNA.