In this way a DNA molecule is similar in structure to a ladder in which the sugar and phosphate groups make the uprights and the nitrogen base groups the rungs. There are four types of nitrogen bases or base groups. 1  Adenine (A). 2  Thyamine (T).3  Cytosine (C). 4  Guanine (G).he nucleotides in the DNA molecule are linked in series from one phosphate, to the next sugar, to the next phosphate and so on. The DNA molecule can be considered as a ladder with the phosphate and the sugar molecules making up the uprights and the bases making up the rungs.
Charleston Airport Shuttles. CHS airport has limousines and taxi services at low rates for incoming travelers. Charleston International Airport is South Carolinaâs busiest airport and is the oldest city of Charleston which rich in history and hospitality.
The City of Charleston had a population of 697 as of July 1, 2015. The primary coordinate point for Charleston is located at latitude 35.2857 and longitude -84.7608 in Bradley County. The formal boundaries for the City of Charleston (see map below) encompass a land area of 1.02 sq. miles and a water area of 0.03 sq. miles. Bradley County is in the Eastern time zone (GMT -5). The elevation is 728 feet. The City of Charleston (GNIS ID: 2404029) has a C1 Census Class Code which indicates an active incorporated place that does not serve as a county subdivision equivalent.