DNA discovery, structure and replication

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Across
  1. 3. Shortened form of Deoxyribose Nucleic Acid
  2. 5. Type of division for growth and repair
  3. 8. Used X-ray data from Rosalind Franklin to solve 3D structure of DNA
  4. 11. describes how the strands run next to each other in opposite directions
  5. 13. A
  6. 14. the act of making an identical copy of DNA
  7. 18. humans have 46 of these in the nucleus
  8. 20. where DNA replication occurs in the eukaryotes
  9. 21. C
  10. 23. used X-rays to photograph crystalized fibers of DNA
  11. 25. T
  12. 26. proposed triple helix model of DNA
Down
  1. 1. determined adenine and thymine about the same
  2. 2. number of hydrogen bonds formed between A and T
  3. 4. radioactive ________ , an atom which is found in DNA , helped determine DNA as genetic material
  4. 6. when one side of the new strand of DNA is retained from the original strand of DNA
  5. 7. enzyme that adds new nucleotides (two words)
  6. 9. Shape of DNA is called (2words)
  7. 10. type of chemical bond between the sugar and phosphates in DNA backbone
  8. 12. proteins that help chemical reactions; an example is DNA polymerase
  9. 15. Structure made up of Sugar, Phosphate and Nitrogen Base
  10. 16. G
  11. 17. number of hydrogen bonds formed between G and C
  12. 19. radioactive ________ , an atom which is found in proteins, helped determine DNA as genetic material
  13. 22. His experiments showed nonpathogenic bacteria could be transformed from nonliving parts of pathogenic bacteria
  14. 24. bond holding nitrogenous bases together