in DNA you have adenine (A), cytosine (C), guanine (G) and thymine (T) which pair up like this
G<->C
A<->T
But in RNA you have adenine (A), cytosine (C), guanine (G) and uracil (U) and they pair up with the DNA like this
G<->C
A<->U
How is it possible that A can pair with U or T?
Now if I have the chemical diagrams (do these sorts of diagram have a name?)
Can I use these to find out these pairings myself (if I didn't know them) and how do you do it?
thanks!