DNA Discovery and Structure

3. X-ray __________ was the technique used by Rosalind Franklin to determine the structure of DNA.
5. A type of virus that attacks bacteria.
6. The DNA strand that runs in the opposite direction 3' to 5'
7. The DNA strand that runs 5' to 3'
11. The sugar phosphate backbone is made of alternating phosphate and _________________.
15. In the Hershey and Chase experiment what element is found in DNA but not protein.
16. The molecule which can be numbered to study organic compounds.
17. A word to describe the orientation of DNA in which the top strand runs in the opposite direction to the bottom strand.
20. The number of hydrogen bonds between C and G.

1. In the Griffith experiment this strain did cause disease.
2. The journal where both Franklin and Wilkins and Watson and Crick published their research on the structure of DNA.
4. A double helix is the shape formed by two strands of ________ twisted around each other.
7. The number of hydrogen bonds between A and T
8. Hershey and Chase radioactively labeled sulfur to detect this molecule
9. In the Griffith experiment this strain did not cause disease.
10. _________ Watson and Francis Crick created the first DNA model.
12. The type of base characterized by adenine and guanine.
13. A scientist who analyzed the amount of adenine, guanine, thymine, cytosine in DNA.
14. The nucleotide that replaces thymine in RNA.
17. The scientist who concluded it was DNA and not lipids or proteins that could change how bacteria behaved.
18. The type of base characterized by cytosine and thymine.
19. In the Griffith experiment this is what happened when the R bacteria changed into the S bacteria.