1. What biomolecule is composed of deoxyribose sugars, phosphates, and the nitrogen-containing bases adenine, guanine, cytosine, and thymine?

2. What holds the nitrogen bases together in DNA?

3. What process makes a copy of DNA so that daughter cells that result from mitosis and cytokinesis each have a copy of DNA?

4. Which five-carbon sugar is characteristic of RNA?

5. What nitrogen base is associated with RNA but not with DNA?

6. What kind of RNA is made when transcription occurs?

7. Which strand of DNA is used to make mRNA?

8. Where in a cell does protein synthesis occur?

9. What molecule transports amino acids to the ribosomes?

10. How many nitrogen bases make up a codon, and what does each codon represent?

11. What connects one amino add to another in the polypeptide chain?

12. Which size DNA fragments, smaller or larger move more quickly through a gel during electrophoresis?