1. Bellwork: 9/12 Put your phone up  Week 9/10-9/14
Explain the difference between monosaccharides and polysaccharides.
What are the building blocks of starches?
What are the 2 functions of starches?

2. Today:
Unit 2, pt. 3 notes
Macromolecules lab

3. Materials
Unit 2 book
Macromolecule lab packet

4. Homework
None 

5. Unit 2: Biochemistry Matter Organic Compounds Carbohydrates* Lipids*
Proteins*
Enzymes*
Nucleic Acids
Biochemical Reactions
Water*
Acids*
Bases*

6.
Unit 2: Biochemistry

7. Part III: Macromolecules - Proteins

8. 4 Types of Macromolecules
Carbohydrates
Lipids
Proteins
Nucleic Acids

9. Proteins Type of Compound Examples Elements Functions Carbohydrates
Sugars, Starches
Carbon, hydrogen, oxygen
Provides energy to cells, stores energy, forms body structures
Lipids
Fats, oils
Stores energy, forms cell membranes, carries messages
Proteins
Enzymes, antibodies
Carbon, hydrogen, oxygen, nitrogen, sulfur
Helps cells keep their shape, makes up muscles, speeds up chemical reactions, carries messages and materials
Nucleic Acids
DNA, RNA
Carbon, hydrogen, oxygen nitrogen, phosphorus
Contains instructions for proteins, passes instructions from parents to offspring, helps make proteins

10. What kinds of foods contain protein?

12. Proteins
Protein: Organic compound made up of small molecules called amino acids
Amino Acids = building blocks of proteins
20 different amino acids commonly found in the proteins of living things
Small proteins: few hundred AAs
Large proteins: thousands of AAs

13. Structure Polypeptide: long chain of amino acids bound together
Proteins consist of 1 or more polypeptide chains with up to 4 levels of structure
The different structures give them unique properties
Needed to carry out various jobs in living organisms

15. Functions Proteins play important roles in living things
Some proteins help cells keep their shape
Some make up muscle tissue

16. Example - Hemoglobin Function: transport oxygen in blood
Shape: “globular”
Folded perfectly with binding sites for 4 oxygen molecules

17. Hemoglobin Has quaternary structure
Made of 2 alpha subunits and 2 beta subunits

18. Think!
Proteins have diverse functions. What is it about proteins that allow them to be so diverse?

19. Important Functions in Human Body
Enzymes: proteins that speed up chemical reactions in cells
Antibodies: proteins that bind to foreign substances such as bacteria and target them for destruction

21. Macromolecule
Building Block(s)
Function(s)
Proteins

22. Lab: Proteins

23. Groups Same groups Go to the numbered lab bench
1 test tube rack, numbered test tubes, papertowel, Biuret’s solution, test tube cleaner!

24. Amount of Protein 0 = no protein + = a little protein
++ = medium protein
+++ = lots of protein

25. Testing Put 1 dropper (~1mL) full of each food in a separate test tube
Use the same order of foods as in the list
Put on GOGGLES and leave on until everyone is done with clean up!
Add 10 drops of Biuret’s Solution to each
Mix each tube for 30 seconds, as instructed
Record color change (0 to +++)

26. Clean Up (-10 points for messy lab) Throw foods in TRASH (NOT SINK)
Clean out test tubes w/ test tube brush
Leave test tubes upside down to dry
Wipe down counters & put materials on cart

27. WARNING
You MUST wear GOGGLES at all times during this lab!

28. Agenda
Get into groups
Complete lab
Clean up!
Conclusion questions 