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a nucleotide base found in only RNA Learn with flashcards, games, and more — for free.
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6 ημέρες πριν · Uracil (U) is one of the four nucleotide bases in RNA, with the other three being adenine (A), cytosine (C) and guanine (G). In RNA, uracil pairs with adenine. In a DNA molecule, the nucleotide thymine (T) is used in place of uracil.
Not to be confused with uridine. Uracil (/ ˈjʊərəsɪl /) (symbol U or Ura) is one of the four nucleotide bases in the nucleic acid RNA. The others are adenine (A), cytosine (C), and guanine (G). In RNA, uracil binds to adenine via two hydrogen bonds. In DNA, the uracil nucleobase is replaced by thymine (T). Uracil is a demethylated form of thymine.
Uracil is only found in RNA and not in DNA. It forms two hydrogen bonds with adenine during RNA synthesis. Uracil is a pyrimidine, similar to cytosine and thymine. The presence of uracil instead of thymine helps distinguish RNA from DNA in cells.
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