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 composed of nucleotides bounded together by a backbone and connected at the center by hydrogen bonds. A nucleotide is made up of three parts: a phosphate group, a 5 carbon sugar (deoxyribose in DNA), and a nitrogenous base (adenin, thymine, guanine or cytosine).DNA is a nonparallel molecule, so the composition of the backbone is a combination of the phosphate and sugar molecule that composes the nucleotide.NA is composed of nucleotides bounded together by a backbone and connected at the center by hydrogen bonds. A nucleotide is made up of three parts: a phosphate group, a 5 carbon sugar (deoxyribose in DNA), and a nitrogenous base (adenin, thymine, guanine or cytosine).