Mohsen · 2013-12-01 21:48:03

Can nucleotides A and A establish a bond? or U&U, C&C, G&G?

AMiR · 2013-12-02 00:02:12

No.

The statement clears:

there could be hydrogen bonds established between any pair of (A,U), (U,A), (G,C) or (C,G) nucleotides, but not for the other cases.

Mohsen · 2013-12-02 00:10:28

Yep, I was getting wrong answer and didn't know what's the problem! Now, it's clear. Thanks anyway.