Name _________________________________________________ Pd. _____________________ Date ____________________
Virtual Organic Molecules Lab
Cells contain many organic molecules. These molecules are essential to life. Many of them are acquired from the food we eat. In this
lab you will study carbohydrates, proteins and lipids (fats).
Go to my website:
Scroll down to Chapter 2B
Click on the link to the lab
cooknscience.wikispaces.com
Organic Molecules lab
Click on the Carbohydrates tab and answer the following questions:
1.
What solution tests for monosaccharides (simple sugars)?
2.
Write the procedures for testing for monosaccharides:
a.
b.
c.
d.
3.
What color is this solution normally (heated with water)?
4.
Continue with the procedure:
e.
d.
5.
What color change reaction indicates a positive result (give all the colors possible)?
6.
Now you are going to test with Iodine solution. What color is Iodine mixed with water?
7.
What happens when you add corn starch to the iodine solution?
Click on the Proteins tab and answer the following questions:
8.
What solution do you use to test for Proteins?
9.
What color does this solution turn when mixed with 2mL of water?
10. What color does the solution turn when you add 2mL of a Protein solution to it?
Name _________________________________________________ Pd. _____________________ Date ____________________
Click on the Fats tab and answer the following questions:
11. What is Sudan IV? What does it dissolve in, what does it not dissolve in?
12. What color is Sudan IV when mixed with water?
13. What color does the Sudan IV change to when mixed with vegetable oil?
Click on the Foods tab, then click on the picture of each food.
Complete the online tests and indicate if the results were either positive (+) or negative (-).
Potato
Orange
Juice
Almonds
Eggs
Salmon
Milk
Sugar
Starch
Protein
Fat
Post lab questions:
14. What was the purpose mixing the different solutions with water?
15. If you were to test the following food items what results (positive and negative) do think you would get and WHY?
a.
Ground meat:
b.
Peanut butter:
c.
Chocolate chip cookie:
d.
Strawberries: