biology PAMELA

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