The DNA Double Helix PDF

The DNA Double Helix DNA (Deoxyribo Nucleic Acid): By structure DNA is a double stranded molecule that is twisted into a Helix (spiraling staircase) DNA: Contributions of major scientists 1. Rosalind Franklin 2. James Watson 3. Francis Crick 4. Maurice Wilkins Two forms of DNA In...

The DNA Double Helix DNA (Deoxyribo Nucleic Acid): By structure DNA is a double stranded molecule that is twisted into a Helix (spiraling staircase) DNA: Contributions of major scientists 1. Rosalind Franklin 2. James Watson 3. Francis Crick 4. Maurice Wilkins Two forms of DNA In 1951, Rosalind Franklin discovers the Two Forms of DNA through her X-ray diffraction images. Watson and Crick’s Work In 1951, James Watson traveled from the United States to work with Francis Crick at Cambridge University. They physically built models out of wire, sheet metal, nuts and bolts to come up with the structure of DNA.  Watson and crick already knew from Franklin and Wilkins work that DNA was in the form of a Double Helix. They used Chargaff’s Rule to figure out how the 4 Bases match up in pairs. 4 Bases 1. Guanine 2. Cystosine 3. Adenine 4. Thymine They discovered that: -The Phosphate Backbone was on the outside which protected the Bases on the inside. - DNA acts as a Template or a Copying Mechanism for reproduction. They discovered that: -The Phosphate Backbone was on the outside which protected the Bases on the inside. - DNA acts as a Template or a Copying Mechanism for reproduction. DNA structure: Achievement Watson and Crick along with Wilkins won the Nobel Prize in Physiology/Medicine (1962) for their discovery of the DNA double helix structure THANK YOU.