1 / 10

The road to DNA, its importance and structure

The road to DNA, its importance and structure. Griffith, Avery, Macleod 1944. Transformation: DNA could transform cells whereas proteins could not. Chargaff: 1947. Equal % of C and G Equal % of A and T. Hershey and Chase: 1952. Franklin’s X-ray crystallography: early 1950’s.

cady
Download Presentation

The road to DNA, its importance and structure

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. The road to DNA, its importance and structure

  2. Griffith, Avery, Macleod 1944 • Transformation: DNA could transform cells whereas proteins could not

  3. Chargaff: 1947 • Equal % of C and G • Equal % of A and T

  4. Hershey and Chase: 1952

  5. Franklin’s X-ray crystallography: early 1950’s Had to be able to crystalize molecule Regular pattern= helix

  6. Waston and crick: 1953 • Double helix model

  7. Messelson and Stahl: late 1950’s: Semi-conservative replication

  8. Chromosome structure: later

  9. DNA structure • Antiparallel: opposite directions

  10. Complementary: base pairs • Always one purine (double ring) A or G • Always one pyrimidine (single ring) C or T • A/T only has two H bonds so it is easier to unzip.

More Related