Thymine is a nitrogen base seen in DNAs.
Nuclear acids are made of Nucleotides. These nucleotides have three major parts:
- A pentose monosaccharide
- A phosphate group
A nitrogen base group
There are four types of nitrogen bases:
From these four nitrogen base groups, Adenine and Guanine are called Purines and Thymine and Cytosine are called Pyrimidine.
There are two polynucleotide chains in a DNA and they are connected by the Hydrogen Bonds between these four Nitrogen Bases. Here Adenine and Thymine create 2 H bonds between them( and cytosine and guanine makes three H bonds between them).
In RNA. the other nuclear acid form, there are no Thymine and instead of that there is a nitrogen base called Uracil.