In RNA, a point mutation can involve the substitution of uracil with another nucleobase, such as cytosine (C) or guanine (G). These mutations can potentially alter the amino acid sequence of the ...

How can just four nitrogenous bases--adenine, cytosine, guanine, and uracil--possibly code for all 20 amino acids? Thus, early researchers quickly determined that the smallest combination of As ...

This image illustrates the chemical structures of the five main nucleobases found in DNA and RNA. The pyrimidines, thymine (DNA), uracil (RNA), and cytosine are shown on top while the purines, adenine ...