Which statements about complementary base pairing are correct?
1 It occurs during translation.
2 Purines and pyrimidines are the same size.
3 The base pairs are of equal length.
4 Uracil forms three hydrogen bonds with adenine.
1 )
1 and 2 only
1 and 3 only
3 )
2 and 3 only
4 )
3 and 4 only
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