DNA History

Question 1

Frederick Griffith (3 points)

Answer 1

• 1928
• discovered the transformation principle using stain injections
• dead bacteria can pass DNA to live bacteria — and change them.

Question 2

Joachim hammerling (2 points)

Answer 2

• 1934
• hypothesized that DNA is stored in the nucleus

Question 3

Erwin chargaff

Answer 3

• 1950
• discovered that dna has base pairs (ATGC)

Question 4

Hershey and Chase

Answer 4

• 1952
• the discovered that DNA is a genetic material that is passed on, and not protein using radioactive tagging (S and P)

Question 5

Rosalinda Franklin

Answer 5

• 1953
• Discovered the DNA shape (double helix) using an X-ray

Question 6

Watson and Crick

Answer 6

• 1953
• built the first accurate DNA model using Rosalinda’s X-ray, which should DNA is a double helix formed by base pairs