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Which Bases Below Are Purines

Question 20

Multiple Choice

Which bases below are purines?
1) adenine
2) cytosine
3) guanine
4) thymine
5) uracil

A) 1 and 2
B) 2 and 3
C) 1, 3, and 5
D) 1 and 3
E) 2, 4, and 5

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