Topics covered in this video include: Development of the DNA Structural Model, The Central Dogma, Gene Regulation, DNA Mutations, and DNA Technologies.
The biochemist Erwin Chargaff developed a method to study the chemical composition of DNA. Nitrogen bases are the main components: Adenine, Thymine, Guanine, and Cytosine. Rosalind Franklin took x-ray diffraction photos of DNA and from these, Watson and Crick derived the structure.
Nucleic acids consist of nucleotide chains; nucleotides are composed of a phosphate, a sugar, and a nitrogen-containing base. By the 1920s scientists recognized two different nucleic acid chains, ribonucleic acid (RNA) and deoxyribonucleic acid (DNA).