Here's a breakdown:

* Proteins are complex molecules made up of chains of amino acids.

* Enzymes are a special type of protein that act as biological catalysts, speeding up chemical reactions within cells.

While most enzymes are proteins, there are a few exceptions, called ribozymes, which are made of RNA (ribonucleic acid). However, these are much less common than protein-based enzymes.

So, the fundamental building blocks of cell enzymes are amino acids, which are linked together to form proteins, giving the enzymes their specific structure and function.