Crossword

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Across
  1. 3. site- what is a region or an enzyme where a substrate binds to the enzyme?
  2. 5. what can be vitamins that bind with the enzyme and then begin a chemical reaction?
  3. 9. what elements are required for normal melabolism?
  4. 10. what is a substance which an enzyme acts?
  5. 12. what is a measure of how acidic or basic a substance is?
Down
  1. 1. what molecules are required for metabolic reactions?
  2. 2. what is a substance that accelerates a chemical reaction?
  3. 4. what is a chemical substance that is a present at the start of a chemical reaction?
  4. 6. acid- what molecules combine to form proteins?
  5. 7. what is produced by living organisms that catalyses chemical reactions?
  6. 8. what is the result of an enzymatic reaction?
  7. 11. energy- what type of energy is required to initiate a reaction?