1. What are the three components of a nucleotide? Which of these components are found in both RNA and DNA? Which are found only in DNA or RNA? What is the defining characteristic that distinguishes RNA and DNA? 2. Describe the secondary structure of DNA. Your answer should include the terms antiparallel, double helix, complementary, and base pairing. 3. Draw a strand of DNA with the sequence CATG. Indicate the directionality of the strand. Why are the terms 5' and 3' used to label the ends of the strand? Then draw the complementary strand of DNA, indicating the directionality of this strand and the hydrogen bonds between the bases. 4. Explain the statement, "DNA functions as an information-containing molecule." 5. Can RNA or DNA function as a catalytic molecule? Explain in the context of molecular and structural properties. 6. What is a ribozyme? Compare and contrast ribozymes and protein-based enzymes. 7. What features distinguish one monosaccharide from another? How can small changes in monosaccharide structure affect function? 8. What type of bond links monosaccharides? How can different linkages lead to different polysaccharide structures and functions? 9. Explain the three key functions of carbohydrates. Give examples of each.