DNA and Replication Review Questions
1. What does DNA stand for?
2. What does DNA do?
3. Where is DNA located?
4. What scientists discovered that DNA is the molecule that carries genetic material?
5. What does helix mean?
6. What did Watson and Crick discover about DNA?
7. What is a nucleotide? What are the 3 parts of a nucleotide? (Make sure you can draw and label a
nucleotide.)
8. What are the sides of the “ladder”, or backbone, composed of in a DNA molecule?
9. What type of bond holds the backbone together?
10. What are the steps of the “ladder” composed of in a DNA molecule?
11. How many types of nucleotides are there? What makes them different from one another?
12. What is the difference between a pyrimidine and a purine? List the bases that are pyrimidines and the
ones that are purines.
13. What are the 4 nitrogen bases found in DNA?
14. What type of bonds hold the nitrogen bases together?
15. Describe Chargaff’s base pairing rules.
16. Complete the DNA strand below:
ATGCCGT
17. What is DNA replication?
18. Where and when does DNA replication happen?
19. Describe step one, step two and the end result of DNA replication.
20. Why does DNA replication need to occur?
21. If one strand of DNA had the sequence TAGGTAC, what would be the sequence of the complimentary
DNA strand?