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julia.s julia.s
wrote...
Posts: 79
Rep: 1 0
12 years ago
a. guanine
b. cytosine
c. adenine
d. uracil
e. another thymine

I keep finding that all of them except (uracil) are the answer, but I can only have one answer. Please help.
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wrote...
12 years ago
Only adenine!
And guanine is only paired with cytosine.
wrote...
12 years ago
Adenine is one of the two purine nucleobases (the other being guanine) used in forming nucleotides of the nucleic acids. In DNA, adenine binds to thymine via two hydrogen bonds to assist in stabilizing the nucleic acid structures. In RNA, which is used for protein synthesis, adenine binds to uracil.

Adenine will always pair up with thymine
guanine will always pair up with cytosine
and uracil will always pair with adenine not thymine RNA only
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