501 Lecture Notes - X-Ray Crystallography, Francis Crick, History Of Molecular Biology
Document Summary
Dna is a molecule made up of the genetic information needed for an organism to form, grow, operate correctly, and reproduce. Many scholars over several centuries contributed to the discovery of dna, but the work of james watson, francis crick, and rosalind franklin made the most important discovery. In 1953, using franklin"s x-ray crystallography results, they suggested the double helix structure of dna, which is the most widely recognized model to this day. A sugar, phosphate group, and nitrogenous base make up each nucleotide in dna, which together form a double helix that coils around itself. This finding marked a major advance in molecular biology and cleared the way for future studies in genetics and biotechnology. Dna"s primary constituents are nucleotides, and there are four main classes. (c) cytosine consist of the four nitrogenous bases that give rise to dna and rna, along with the sugar molecule deoxyribose and the phosphate group.
