Cytosine is a pyrimidine that forms three hydrogen bonds.Uracil is also a pyrimidine.Based on this information,one can conclude that uracil forms _______ hydrogen bonds and pairs with _______.
A) three;guanine (a two-bond pyrimidine)
B) three;adenine (a three-bond purine)
C) three;guanine (a three-bond purine)
D) two;adenine (a two-bond purine)
E) two;thymine (a two-bond pyrimidine)
Correct Answer:
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A)
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