Download 1. Enzyme responsible for the unwinding and "unzipping" of DNA

DNA - History, Structure, Replication
Across
2. Each original strand of DNA serves as a ______________ during DNA replication.
5. Double ring bases: adenine and guanine.
6. Scientist who repeated Griffith's work and determined the importance of DNA in
transformation.
8. The five-carbon sugar found in DNA and to which nitrogen bases attach.
9. The stage of the cell cycle in which DNA replication takes place.
10. The model which states that parental strands of DNA serve as a blueprint for the new,
complementary strands.
11. Scientist whose pictures helped to determine the shape of DNA.
14. Scientists who built the first accurate model of DNA.
17. Number of identical strands of DNA following DNA replication.
18. The type of macromolecule which includes DNA and RNA.
19. The double stranded molecule which contains the genetic information found in all living
things.
21. Type of bond which holds together nitrogen base pairs.
22. In addition to deoxyribose sugars, this structure makes up the backbone of the DNA
molecule.
24. Site where replication occurs within a DNA molecule.
25. The sections of nucleotides that are pieced together during DNA replication.
Down
1. Enzyme responsible for the unwinding and "unzipping" of DNA during replication.
3. Single ring bases: thymine and cytosine.
4. Technique used by Rosalind Franklin to produce the important "Photo 51."
7. Scientists who studied viruses and concluded that DNA carried genetic information, not
proteins!
12. Phrase used to describe the double helix shape of DNA.
13. Scientist who discovered transformation.
15. The monomer subunit of DNA - made up of a sugar, phosphate, and nitrogen base.
16. The enzyme responsible for "putting together" the complementary strand of DNA during
replication.
20. Pairs of these structures make up the "steps" of the double helix.
23. Scientist who studied nitrogen bases and determined that adenine and thymine always
occur in equal amounts.
26. The process through which DNA is duplicated (copied).