biology PAMELA

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Across
  1. 5. increases the rate of a chemical reaction
  2. 6. structural protein found in skin
  3. 8. are polymers of amino acids
Down
  1. 1. a substance obtained
  2. 2. energy nessesary to turn a sub to a pro
  3. 3. deriving from the metabolism of a organism
  4. 4. the substance on which an enzyme acts
  5. 7. catalyst to bring about a chemical reaction