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.
Carbon dioxide is the main one, because the atmosphere holds 200 times as much of it. But a given amount of methane traps at least 25 times as much heatâunless you burn it first. Then it enters the atmosphere as COâ. Thatâs the other side of this Jekyll-and-Hyde story: A lot of methane is being burned these days. In the past decade the technology called hydraulic fracturing, âfrackingâ for short, has enabled drillers in the United States to extract natural gas from deeply buried shales they couldnât tap before.