Content Review

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Content Review

This is an on-line version of the same Content Review questions included at the end of the chapter in your textbook. Use this version to quickly and easily submit your work to your instructor or teaching assistant.

1. What are the four nitrogenous bases found in RNA?

2. What determines the primary structure of an RNA molecule?

3. DNA attains a secondary structure when hydrogen bonds form between the nitrogenous bases called purines and pyrimidines. What are the complementary base pairs that form in DNA?

4. By convention, biologists write the sequence of bases in RNA and DNA in which direction?

5. In RNA, when does the secondary structure called a hairpin form?

6. Twenty different amino acids are found in the proteins of cells. What distinguishes these molecules?

7. The secondary structure of DNA is called a double helix. Why?

8. What makes a molecule chiral?

Answer choices in this exercise are randomized and will appear in a different order each time the page is loaded.




1.	What are the four nitrogenous bases found in RNA?



2.	What determines the primary structure of an RNA molecule?



3.	DNA attains a secondary structure when hydrogen bonds form between the nitrogenous bases called purines and pyrimidines. What are the complementary base pairs that form in DNA?



4.	By convention, biologists write the sequence of bases in RNA and DNA in which direction?



5.	In RNA, when does the secondary structure called a hairpin form?



6.	Twenty different amino acids are found in the proteins of cells. What distinguishes these molecules?



7.	The secondary structure of DNA is called a double helix. Why?



8.	What makes a molecule chiral?



Answer choices in this exercise are randomized and will appear in a different order each time the page is loaded.

Chapter 3: Macromolecules and the RNA World

Content Review