Here's a breakdown:

* Nucleic acids are large biomolecules that carry genetic information. There are two main types: deoxyribonucleic acid (DNA) and ribonucleic acid (RNA).

* Nucleotides are the building blocks of nucleic acids, just like amino acids are the building blocks of proteins.

Each nucleotide is composed of three parts:

1. A nitrogenous base: There are five common nitrogenous bases: adenine (A), guanine (G), cytosine (C), thymine (T) (found in DNA), and uracil (U) (found in RNA).

2. A five-carbon sugar: This is either deoxyribose (in DNA) or ribose (in RNA).

3. A phosphate group: This is a negatively charged molecule attached to the sugar.

These three parts are linked together in a specific way to form a nucleotide. Nucleotides then link together to form long chains called polynucleotides. These chains are the primary structure of DNA and RNA.

Let me know if you'd like more details about any of these components!