If it is a long run, 16 gauge is preferred. If the run is very short, you probably can use 18 gauge with no apparent difference in sound. But the cost difference is fairly small, so 16 gauge is preferred. There is no shielding on speaker wire, so the covering is of little import.
The backbone of the DNA strand is made from alternating phosphate and sugar residues. The sugar in DNA is 2-deoxyribose, which is a pentose (five-carbon) sugar. The sugars are joined together by phosphate groups that form phosphodiester bonds between the third and fifth carbon atoms of adjacent sugar rings.
DNA is made up of chains of nucleotides, molecules made up from purine, pentose sugar, and a phosphate group, put onto a sugar and phosphate backbone and wrapped around each other; this is called a double helix. There are four bases in DNA; guanine, cytosine, adenine, and thymine.here are four bases that make up RNA just as DNA has. RNA's four bases consist of adenine, cytosine, guanine, and uracil. RNA is also what a mutagen looks for. If a mutagen takes over RNA it is able to change the DNA and make the cell do what the mutagen wants it to do rather then what it is supposed to do.