Thymine into Uracil or vice verse?

Answer 1

Thymine in DNA and uracil in RNA. They are both pyrimidines and are attached to purine adenine.

Answer 2

Thymine can be converted into uracil through a process called deamination, where the methyl group on thymine is removed to form uracil. This process is carried out by enzymes called deaminases. Conversely, uracil can be converted into thymine by adding a methyl group to uracil, a process facilitated by enzymes called methyltransferases.