Dehydration synthesis is the process that forms large molecules (polymers) from smaller molecules (monomers) by removing water.

Here's how it works:

1. Monomers are brought together.

2. A hydroxyl group (-OH) is removed from one monomer and a hydrogen atom (-H) is removed from another.

3. The removed -OH and -H combine to form a water molecule (H2O), which is released.

4. The remaining portions of the monomers bond together, forming a larger molecule.

This process is crucial for building:

* Carbohydrates: Monosaccharides (like glucose) join to form disaccharides (like sucrose) and polysaccharides (like starch and cellulose).

* Proteins: Amino acids link together to form polypeptide chains, which fold into proteins.

* Lipids: Glycerol and fatty acids combine to form triglycerides.

* Nucleic acids: Nucleotides join to form DNA and RNA.

In summary, dehydration synthesis is the process by which large molecules are built by removing water from smaller molecules.