Biochemistry Worksheet # 2 (Lipids)
AP Biology
Name ___________________________
Use the textbook assigned by your teacher or the following web resources from two
online biology textbooks to assist you in answering the following questions. A link to
award winning teacher Paul Andersen's YouTube video on this topic is also provided.
Many other examples of free online texts are available on the web. Links to
resources may change. Please contact your instructor if you have problems accessing
the information needed to complete this assignment.
Online Texts
http://www.ck12.org/book/CK-12-Biology-Advanced-Concepts/section/2.0/
http://www2.estrellamountain.edu/faculty/farabee/biobk/BioBookCHEM2.html
Paul Andersen Biochemistry Videos
Molecules of Life Video
https://www.youtube.com/watch?v=QWf2jcznLsY
Lipids
https://www.youtube.com/watch?v=VGHD9e3yRIU
1. Lipids include fats, waxes, oils, phospholipids, and steroids.
What characteristic do all lipids share?
Use the diagram below and your knowledge of biology to answer questions
2 and 3 which follow.
Page
3. What are the subunits or building blocks of this compound?
1
2. Identify this compound classification.
Biochemistry Worksheet # 2 (Lipids)
AP Biology
Name ___________________________
4. How many water molecules are removed in forming the structure on the preceding page?
Is this structure formed from its building blocks by synthesis or hydrolysis?
Support your answer.
5. Why are many unsaturated fats liquid at room temperature?
6. What is a trans fat? Why should you limit them in your diet?
7. List three important functions of fats.
Page
2
8. Use the diagram below to answer the following:
Biochemistry Worksheet # 2 (Lipids)
AP Biology
Name ___________________________
a. Identify this molecule
b. Identify the letter pointing to the phosphate group.
c. Identify the letter pointing to the hydrocarbon tails.
d. Identify the letter pointing to the hydrophilic portion of this molecule.
e. Identify the letter pointing to the hydrophobic portion of this molecule.
9. Why is the “tail” of a phospholipid hydrophobic?
10. Why are the tails all located in the interior of membranes?
Page
12. List three examples of steroids.
3
11. Identify the classification of lipid represented by the structure below.