Nitrogen bases are

Nitrogen base seen in lecithin is

Nitrogen bases of DNA are

Nitrogen bases of DNA are

Unusual nitrogenous bases are common in :

Nitrogen base seen in lecithin is

Nitrogen bases of DNA are

In a segment of DNA molecule there occurs 200 molecules of adenine nitrogen bases and 200 molecules of cytosine nitrogen bases. What will be the total number of purine nitrogen bases in this segment ?