enzymes

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Across
  1. 2. any substance that speeds up a reaction
  2. 6. the substance produced in an enzyme reaction
  3. 8. enzymes can be used over and over _____ after a chemical reaction
  4. 9. the substance an enzyme works on
  5. 10. a biological catalyst
Down
  1. 1. type of protein, found on the surface of cells
  2. 3. enzymes _____ up chemical reactions
  3. 4. type of protein, a chemical messenger
  4. 5. enzymes remain ______ after a chemical reaction
  5. 7. what enzymes are made out of
  6. 8. type of protein, fights infections