Structure of DNA

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Across
  1. 2. Base only found in RNA
  2. 3. Stable yet enzyme-breakable bonds linking nucleotides in DNA and RNA
  3. 5. Nitrogenous bases with a double carbon-nitrogen ring
  4. 6. Biological molecule arranged in a double helix
  5. 8. An entity with two opposite charge
  6. 13. According the rules of Chargaff, which base does guanine share his concentration with?
  7. 14. Five carbon sugar that lacks hydroxil group on 2'
  8. 15. The fundamental building block for nucleic acids like DNA and RNA
Down
  1. 1. A molecule composed of a nitrogenous base and a five-carbon sugar linked together
  2. 4. Short chains of single-stranded DNA
  3. 7. The scientist whose X-ray diffraction work was key to Watson and Crick’s discovery name
  4. 9. Each nucleotide is made of a sugar, a phosphate group, and a ______
  5. 10. Sugar in DNA nucleotides
  6. 11. The two strands of DNA are held together in space as a ______ helix
  7. 12. A strong chemical bond formed when electrons are shared between two atoms