The building block of DNA that consists of a deoxyribose sugar, a phosphate group and one of four nitrogen bases.

The twisted ladder shape of DNA

A nitrogen containing molecule located on the nucleotide.

DNA from any cell of any organisms should have a 1:1 ratio of pyrimidine and purine bases and, more specifically, that the amount of guanine should be equal to cytosine and the amount of adenine should be equal to thymine

A term applied to two molecules that are side by side but run in opposite directions.

The process of making an exact copy of genetic information

A mass of genetic material composed of DNA and proteins that condense to form chromosome

A string of DNA wrapped around associated proteins that give the connected nucleic acid bases a structure. It is tightly coiled.

A process in which the double stranded DNA molecule separate, and each strand is used as a template for the synthesis of a new strand.

American scientist credited with the discovery of the structure of DNA.

British scientist credited with the discovery of the structure of DNA.

Scientist who used x-ray crystallography to create the famous Photograph 51 that ultimately led to the discovery of the structure of DNA.