Chapter 5 Worksheet # 2  (The Structure and Function of Macromolecules)
AP Biology

1.    Identify the group of large organic molecules which have little or no affinity for water.

2.    How are fats constructed and what are they constructed from?

3.    Describe the structure of a typical fatty acid.

4.    How are triglycerides formed and from what subunits?

5.    Explain the difference between a saturated and an unsaturated fatty acid.

6.    Why can a diet rich in saturated fats be dangerous to health?

7.    What is the chief function of triglycerides in humans and other animals?

8.  Identify the polar and nonpolar ends of the phospholipid molecules at the right.   Also indicate the hydrophobic and hydrophilic ends. 9.  Identify the phosphate group and two hydrocarbon tails in each of the phospholipid molecules at the right. 10.  Where are phospholipids frequently found in living systems?

11.    Describe the structure of the steroids.

12.    Cholesterol is an example of a steroid.    State two functions of cholesterol.

13.    Explain why the steroids such as cholesterol are classified as lipids.