Question

Which base is normally used in the synthesis (making) of RNA but not in the synthesis (making) of DNA?

Answer 1

The correct answer is uracil.

Uracil is one of the pyrimidine nucleotide bases which is the component of nucleic acid-RNA. In RNA, uracil binds to adenine via two hydrogen bonds (complementary binding). Uracil is not found in DNA, it is replaced by thymine because it is thymine’s demethylated form.