The structure of DNA

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Across
  1. 5. gives DNA its acidity
  2. 6. base-pairing rule
  3. 7. main sugar in the DNA molecule
  4. 8. the third component of DNA monomers
Down
  1. 1. means that two strands run in opposite direction to each other
  2. 2. link the two strands together
  3. 3. 3D shape of DNA
  4. 4. the building blocks of DNA
  5. 5. a molecule made up of repeating units
  6. 6. involved in single strand formation