Purines and pyrimidines are nitrogen bases found in DNA and RNA .They are nitrogen containing heterocyclic compounds .Purines are large double ringed while pyrimidines are sma â¦ ll single ringed .
Frozen Methane is exactly what it sounds like. Frozen methane. Or in other words, it's methane locked in ice, which is called hydrates. It is also known as fire ice, because of it's ice-like appearance and ability to burn when lit with a match. Frozen Methane is formed when a large amount of methane is trapped within a crystal structure of water, forming a solid similar to ice.
Methane hydrate, also called methane ice or methane clathrate, consists of methane, which is enclosed in frozen water.The water molecules completely surround the methane. Methane hydrate is a common constituent of the shallow marine (ocean) geosphere.In 1971, it was first discovered in Black Sea.ethane hydrate is often described as âmethane gas surrounded by ice.â Although this description is easy to understand, it's not completely accurate. A more accurate description would be that methane hydrate consists of methane gas trapped inside cage-like crystal structures made up of water molecules..