crosswords

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Across
  1. 2. with a perfect mirror-image shape
  2. 4. an enzyme that catalyses the breakdown of starch to maltose
  3. 7. means best
  4. 8. the substance that an enzyme causes to react
Down
  1. 1. an enzyme that catalyses the breakdown of hydrogen peroxide to water and oxygen
  2. 3. a substance that increases the rate of a chemical and is not changed by the reaction reaction
  3. 5. proteins that are involved in all metabolic reaction
  4. 6. the new substance formed by a chemical reaction