Acids and bases have been used by chemists for centuries, and are among the most fundamental reagents employed in synthetic organic chemistry. This Aldrich product line ranges from BrÃ¸nsted and Lewis... Chemfiles Volume 1 Article 3.
Bases are found in both DNA and RNA. As seen below, they are adenine, cytosine, guanine, thymine, and uracil. They are abbreviated (A, C, G, T, U). Three of the bases (A, G, C) are found in both DNA and RNA. However, uracil (U) is found only in RNA and thymine (T) is found only in DNA.he first three are the same as those found in DNA, but in RNA thymine is replaced by uracil as the base complementary to adenine. This base is also a pyrimidine and is very similar to thymine.
RNA or DNA nucleotides containing either thymine or uracil are all complementary to DNA or RNA nucleotides containing Adenine. It is therefore all to do with probability of occurence of the more stable form, and of inclusion in the polynucleotide that is subsequently created.