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.
(uncountable) Any similar frozen form of a gas or liquid. 2008, Neal Asher, Alien Archaeology Clad in a coldsuit Jael trudged through a thin layer of CO2 snow ... (uncountable) The moving pattern of random dots displayed on a television, etc., when no transmission signal is being received.