Nucleotides are organic molecules that serve as the monomers, or subunits, of nucleic acids like DNA and RNA. The building blocks of nucleic acids, nucleotides are composed of a nitrogenous base, a five-carbon sugar (ribose or deoxyribose), and at least one phosphate group.ithout the phosphate group, the nucleobase and sugar compose a nucleoside. The phosphate groups form bonds with either the 2, 3, or 5-carbon of the sugar, with the 5-carbon site most common. Cyclic nucleotides form when the phosphate group is bound to two of the sugar's hydroxyl groups.
Metropolitan area. A metropolitan area, sometimes referred to as a metro area, greater area, commuter belt or conurbation, is a region consisting of a densely populated urban core and its less-populated surrounding territories, sharing industry, infrastructure, and housing. A metro area usually comprises multiple jurisdictions and municipalities: neighborhoods, townships, boroughs, cities, towns, exurbs, suburbs, counties, districts, states, and even nations like the eurodistricts. As social, economic and politica
This article is about the metropolitan area in Oregon and Washington. For the metropolitan area in Maine, see Portland, Maine metropolitan area. The Portland metropolitan area or Greater Portland is a metropolitan area in the U.S. states of Oregon and Washington centered on the principal city of Portland, Oregon.he PortlandâVancouverâHillsboro Metropolitan Statistical Area (MSA), the 23rd largest in the United States, has a population of 2,226,009 (2010 Census).