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19zbell 19zbell
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6 years ago
Purines and pyrimidines are two classes of organic bases found in ____.
 
  a. sugars
  b. phosphates
  c. fats
  d. carbohydrates
   e. nucleic acids
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junyanjunyan
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6 years ago
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19zbell Author
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6 years ago
Thank you for answering correctly!
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