The purines are bases in the DNA. The two purines in DNA are Adenine and Guanine. These two purines forms hydrogen bonds with their complimentary pyrimidines such as Thymine and Cytosine to keep the two rails of the DNA molecule together.
NH - 44 covering Srinagar to Kanyakumari is the longest National Highway in India by the NHDP. It covers a distance of 3,745 Kms. It was previously known as NH - 7.