DNA and RNA Bases. In DNA, there are four different bases: adenine (A) and guanine (G) are the larger purines. Cytosine (C) and thymine (T) are the smaller pyrimidines.
Gretna is the second-largest city and parish seat of Jefferson Parish, Louisiana, United States. Gretna is on the west bank of the Mississippi River, just east and across the river from uptown New Orleans. It is part of the New Orleans â Metairie â Kenner Metropolitan Statistical Area. The population was 17,736 at the 2010 census.
1 Capital One, National Association: Gretna Branch at 2 Westside Shopping Center, branch established on 1958/01/31. 2  Info updated 2011/07/01: Bank assets: $133,477.8 mil, Deposits: $97,063.7 mil, headquarters in Mclean, VA, positive income, 984 total offices, Holding Company: Capital One Financial Corporation.