Purines (adenine and guanine) are larger, double-ring nitrogenous bases found in DNA and RNA, while pyramidines (cytosine, thymine, and uracil) are smaller, single-ring bases. Purines always pair with pyramidines in DNA strands to maintain the proper structure of the double helix.
i) thymine ii) cytosine and iii) - in Rna only is found - uracil.
how many rings does mars have
Saturn has many colorful rings.
6 rings
mercury has no rings
2 rings
Venus does not have rings.
2 rings
4 Superbowl rings.
it has 2o rings
There are no rings in Venus.