Dehydration synthesis is the process of joining monomers together to form polymers, releasing a water molecule in the process. To reverse this process, we need to break down the polymer back into its individual monomers, and this is achieved through hydrolysis.

Hydrolysis is the process of breaking down a polymer by adding a water molecule. The water molecule breaks the bond between the monomers, adding an -H to one monomer and an -OH to the other.

Here's a simple analogy:

* Dehydration synthesis: Imagine building a chain by linking individual links together, releasing a small piece of metal (representing the water molecule) with each connection.

* Hydrolysis: Imagine taking a chain and adding small pieces of metal to break the links, separating the chain into individual links again.

Here's how hydrolysis works in a chemical context:

1. Water molecule (H2O) is added to the bond between two monomers.

2. The bond breaks.

3. The -H from water attaches to one monomer, and the -OH attaches to the other monomer.

4. The polymer is broken down into individual monomers.

Examples of hydrolysis in the body:

* Digestion of carbohydrates: Starch (a polymer) is broken down into glucose (a monomer) through hydrolysis.

* Digestion of proteins: Proteins (polymers of amino acids) are broken down into individual amino acids through hydrolysis.

* Breakdown of fats: Triglycerides (fats) are broken down into glycerol and fatty acids through hydrolysis.

In essence, dehydration synthesis and hydrolysis are opposite processes that work together to build and break down polymers in biological systems.