1. What are the four major classes of organic molecules?
2. What are the basic subunits of each class of organic molecule?  What is/are the functions of each class of organic molecules in living organisms?
3. Which of the four major classes of organic molecules contain nitrogen?
4. Suppose you analyzed the nucleic acid of an unknown virus and found that it consisted of the nucleotides A, G, C, and U.  What type of nucleic acid would you conclude composes the genetic material of this virus?
5. Suppose you analyzed  the nucleic acid of an unknown virus and discovered that it consisted of 24% A, 16% T, 15% g, and 45% C.  What would you conclude about this DNA?
6. What determines the primary, secondary, tertiary, and quaternary structure of proteins?  What bonds maintain each level of structure?
7. What types of environmental factors can cause denaturation of proteins?  What bonds are broken first during denaturation?
8. What is unique about the chemical formula of carbohydrates?
9. What distinguishes a saturated fat from an unsaturated fat?  Which remains liquid at room temperature?  Give an example of each.

[Adapted from Trefil, J. and R. M. Hazen.  1995.  Instructor's Manual.  The Sciences: An Integrated Approach.  John Wiley & Sons]