Which is seen in RNA but not seen in DNA?
In the Watson-Crick base pairing, adenine (A) forms a base pair with thymine (T), as does guanine (G) with cytosine (C) in DNA.In RNA, thymine is replaced by uracil (U).Alternate hydrogen bonding patterns also occur -- paicularly in RNA -- giving rise to complex and functional teiary structures.
Adenosine
Guanine
Uracil
Thymine