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    Biology
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    Biology Concepts and Applications
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    Exam 8: DNA Structure and Function
  5. Question
    ​A Purine Base Contains ____
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​A Purine Base Contains ____

Question 21

Question 21

Multiple Choice

​A purine base contains ____.


A) ​one less phosphate group than a pyrimidine base
B) ​two rings
C) ​sulfur instead of nitrogen
D) ​phosphate instead of nitrogen
E) ​one ring

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