Organic Molecules- Online Lab
Go to:
http://www.occc.edu/biologylabs/Documents/Organic%20Compounds/Organic%20
Compounds.htm
Click: “Carbohydrates”
Click through experiment as instructed and answer the following questions:
1. What reagent do monosaccharides react with?
2. What will the color change be if it is a positive test?
3. Looking at the bottle of Benedict’s solution, what color is it?
4. Once the glucose is added to the Benedict’s solution in the boiling water, what
color is it?
5. Is the blue color a positive or negative test (no color change)?
6. Is the red/orange color a positive or negative test (color change)?
7. Next is the iodine test. What color is the iodine originally?
8. Once the starch is added to the iodine, what color is it?
9. Is the yellowish color a positive or negative test (no color change)?
10. Is the blackish color a positive or negative test (color change)?
Now you are back at the original page. Click “Proteins”
Click through the experiment as instructed and answer the following questions:
11. What reagent do proteins react with?
12. What will the color change be if it is a positive test?
13. What color is the water when the biurets solution is added?
14. What color is the protein solution when the biurets solution is added?
15. Is the light blue color a positive or negative test (no color change)?
16. Is the purple color a positive or negative test (color change)?
Now you are back at the original page. Click “Fats”
Click through the experiment as instructed and answer the following questions:
17. What is the reagent that will react with fats?
18. What will the color change be if a positive test?
19. What color is the water when Sudan IV is added?
20. What color does the oil change to when Sudan IV is added?
Now you are back at the original page. Click “Foods”
Test each food product for simple sugars, starch, protein, and fat.
Record the color of the food product after the reagent has been added in the chart
below:
Food
21. Potato
22. Orange
Juice
23. Nuts
24. Eggs
25. Salmon
26. Milk
Simple Sugars
Starch
Protein
Fat
27. What molecules were present in the potato according to the tests? (Remember to
look for a color change).
28. What molecules were present in the orange juice?
29. What molecules were present in the nuts?
30. What molecules were present in the eggs?
31. What molecules were present in the salmon?
32. What molecules were present in the milk?