1. The Synthesis and Breakdown of Polymers Let’s review: 1.What are the 4 macromolecules of life?

2. Let’s Review 2. What are the monomers of each macromolecule? 3. What are the polymers of of each macromolecules 4. Predict: How do you think we go from monomer to polymer?

3. A dehydration reaction occurs when two monomers bond together through the loss of a water molecule Polymers are disassembled to monomers by hydrolysis, a reaction that is essentially the reverse of the dehydration reaction The Synthesis and Breakdown of Polymers © 2011 Pearson Education, Inc.

4. Figure 5.2 (a) Dehydration reaction: synthesizing a polymer Short polymer Unlinked monomer Dehydration removes a water molecule, forming a new bond. Longer polymer (b) Hydrolysis: breaking down a polymer Hydrolysis adds a water molecule, breaking a bond. 1 1 1 23 23 4 23 4 1 23

5. Figure 5.2a (a) Dehydration reaction: synthesizing a polymer Short polymer Unlinked monomer Dehydration removes a water molecule, forming a new bond. Longer polymer 1 2 3 4 1 2 3

6. Figure 5.2b (b) Hydrolysis: breaking down a polymer Hydrolysis adds a water molecule, breaking a bond. 1 2 3 4 1 2 3