Understanding DNA

6. Molecules made up of many joined amino acids
7. Nitrogen-containing molecules used to build up proteins
9. A chemical element or vitamin needed to help an enzyme work well
11. The molecule which attaches itself to an enzyme so a chemical reaction can readily take place
14. A string of amino acids that form a molecule with a biological function
15. A spiral shape

1. A unit made up of a phosphate, a sugar and a base
2. Describes molecules attracted to water
3. One of adenine, guanine, cytosine, thymine, uracil
4. Describes molecules repelled by water
5. Large molecules made up of repeating sub-units
8. Any chemical which speeds up or slows down a reaction without itself being chemically changed in the reaction
10. Single strands of nucleic acid
12. Biochemical catalysts
13. Double strands of nucleic acid
14. Molecules made up of two joined amino acids