Biology 1201A Lecture Notes - Lecture 3: Arthur Kornberg, Frederick Griffith, Deoxyribonuclease

24 views9 pages

Document Summary

In first half of the twentieth century, many scientists believed that proteins were the most likely candidates for the hereditary molecules because they appeared to offer greater opportunities for information coding than nucleic acids. Experiments began when griffith found a substance that could genetically transform pneumonia. 1928: frederick griffith, a british med officer, observed something interesting in his experiments with the bacterium streptococcus pneumoniae. This causes a severe form of pneumonia in mammals. He tried making a vaccine to prevent pneumonia infections in the epidemics that occurred after. Used two strains of bacterium in his attempts. The smooth strain, s, has a polysaccharide capsule surrounding each cell and forms colonies that appear smooth and glossy when grown on a culture plate. When he injected s strain into mice it was highly infective causing pneumonia and killing the mice in a day or two.

Get access

Grade+
$40 USD/m
Billed monthly
Grade+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
10 Verified Answers
Class+
$30 USD/m
Billed monthly
Class+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
7 Verified Answers

Related Documents

Related Questions