The DNA of microorganisms, like all living things, is made up of subunits called nucleotides.

Here's a breakdown:

* DNA (Deoxyribonucleic acid) is a long, complex molecule that carries genetic instructions for building and maintaining an organism.

* Nucleotides are the building blocks of DNA. Each nucleotide is composed of:

* A sugar molecule (deoxyribose in DNA)

* A phosphate group

* A nitrogenous base: There are four different nitrogenous bases in DNA: adenine (A), guanine (G), cytosine (C), and thymine (T).

The sequence of these nucleotides along the DNA molecule determines the genetic code.