Concept 19 The DNA molecule is shaped like a twisted ladder. Earlier work had shown that DNA is composed of building blocks called nucleotides consisting of a deoxyribose sugar, a phosphate group, and one of four nitrogen bases â adenine (A), thymine (T), guanine (G), and cytosine (C).-ray crystallography provided the final clue that the DNA molecule is a double helix, shaped like a twisted ladder. In 1953, the race to determine how these pieces fit together in a three-dimensional structure was won by James Watson and Francis Crick at the Cavendish Laboratory in Cambridge, England.
The Indianapolis International Airport is located off I-70 via exit 68, just five minutes west of I-465. 7800 Col. H. Weir Cook Memorial Drive. Indianapolis, IN 46241.
Location of Indianapolis on a map. Indianapolis is a city found in Indiana, The United States Of America. It is located 39.77 latitude and -86.16 longitude and it is situated at elevation 248 meters above sea level. Indianapolis has a population of 829,718 making it the biggest city in Indiana. It operates on the CDT time zone.