Understanding DNA

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Across
  1. 6. Molecules made up of many joined amino acids
  2. 7. Nitrogen-containing molecules used to build up proteins
  3. 9. A chemical element or vitamin needed to help an enzyme work well
  4. 11. The molecule which attaches itself to an enzyme so a chemical reaction can readily take place
  5. 14. A string of amino acids that form a molecule with a biological function
  6. 15. A spiral shape
Down
  1. 1. A unit made up of a phosphate, a sugar and a base
  2. 2. Describes molecules attracted to water
  3. 3. One of adenine, guanine, cytosine, thymine, uracil
  4. 4. Describes molecules repelled by water
  5. 5. Large molecules made up of repeating sub-units
  6. 8. Any chemical which speeds up or slows down a reaction without itself being chemically changed in the reaction
  7. 10. Single strands of nucleic acid
  8. 12. Biochemical catalysts
  9. 13. Double strands of nucleic acid
  10. 14. Molecules made up of two joined amino acids