Molecular Biology History Flashcards
1
Q
Johann Friedrich Miescher 1869
A
- identifies a weakly acidic substance in the nuclei of cells
- this substance will later be called deoxyribonucleic acid or DNA
2
Q
Brogg and William 1912
A
X-ray diffraction patterns
3
Q
1924
A
microscope studies using stains for DNA and protein show that both substances are present in chromosomes
4
Q
Griffith 1928
A
studied Streptococcus pneumonia (a bacteria that causes pneumonia)
1) smooth (surrounded by mucous coat/capsule)
2) rough
5
Q
Avery, McCarty, Macleod 1944
A
the transforming agent was DNA
6
Q
Hershey, Chase 1952
A
- used radioactively labelled viruses to confirm that DNA is the hereditary material
7
Q
Franklin 1950s
A
- took x-ray diffraction patterns of DNA
- suggested the shape was a double helix
8
Q
Watson and Crick 1953
A
- published the discovery of the structure of DNA
