1. Testing Macromolecules

2. Monosaccharides (Glucose)
What color is Benedict’s before testing?
What is it used to test the presence of?
glucose

3. Which tests are positive for glucose
Which tests are positive for glucose? Which sample shows the highest amount of glucose?

4. Which is a positive test for glucose?
What do the various colors mean?

5. Iodine is what color at start? Which test tube below is a positive test? Which is the control?
Left is potato starch Right is distilled water

6. Which test positive for starch?
Look for blue-black color

7. Would you say the iodine and potato (left) is a positive or negative test?
Would you say the iodine and onion (right) is a positive or negative test?

8. How do glucose molecules and starch molecules compare?

9. Sucrose: glucose + fructose

10. Sudan IV turns fats red Can you tell where the fat and where the water is in this test tube?

11. Sudan IV and Milk

12. What are some difficulties of testing beef broth
What are some difficulties of testing beef broth? Why did we change to chicken broth?

13. Is this a positive or negative fat test?
Before After drying
Positive

14. Does milk have lipids?
Added Sudan IV

15. Would this cat make a positive fat test?

16. What color is Biuret’s at start
What color is Biuret’s at start? How do you know if your sample is positive for protein?

17. PROTEIN TEST
Table 5

18. Does milk have protein?
Added Biuret’s

19. SUMMARY OF MACROMOLECULE LAB TESTS