1. Classifying Macromolecules
Macromolecules are placed into groups based on their chemical composition
The four types of macromolecules are
Carbohydrates
Proteins
Lipids
Nucleic Acids

2. Proteins What foods do you think have protein in them?
Actually, all foods have at least a little, but some foods are higher than others

3. Proteins are Super Important

4. Structure
Proteins are made of carbon, hydrogen, oxygen, and nitrogen

5. Structure
They are polymers made of monomers of amino acids

6. Size
Proteins are very large ,often made of thousands of amino acids

7. Amino Acids
There are 20 different amino acids. All proteins are made from combinations of these amino acids.

8. Structure
Proteins are long chains of amino acids that are linked together through a special type of bond called a peptide bond.
What is this process called?

9. Other Names
Sometimes people call proteins polypeptides because they are made of many amino acids linked by peptide bonds

10. Structure
When all of the amino acids are assembled in a chain, the protein will fold itself into a very specific shape.

11. Structure
The shape of a protein often determines its function.

12. Structure Proteins are very sensitive to changes in pH and temperature
Changes in pH and temperature change the shape of the protein, meaning that it probably won’t function correctly anymore.

13. 3 Major Functions of Proteins
Some proteins help transport materials in and out of cells

14. 3 Major Functions of Proteins
Some proteins form important cell structures

15. 3 Major Functions of Proteins
Some proteins, known as enzymes, control the rate of reactions and regulate processes

16. Testing Procedure Add Biuret solution Blue means no protein
Purple means proteins are present

17. Make a dot for today’s date on your Learning Goal and Scale
TOTD: Wednesday, Oct. 1
Question
Answer
How do you test for proteins?
Make a dot for today’s date on your Learning Goal and Scale