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.
Vandergrift is a borough in Westmoreland County in the U.S. state of Pennsylvania, approximately 30 miles (48 km) northeast of Pittsburgh. Early in the 20th century, it had the largest sheet steel mill in the world. On June 28, 1915, the Borough of Vandergrift Heights was consolidated with Vandergrift.