Florence Bell and DNA Discoveries

Crick and Watson introduce themselves and acknowledge the contributions of Rosalind Franklin, Erwin Chargaff, and Florence Bell in the discovery of DNA's structure. They discuss Franklin's experimental work with X-rays, Chargaff's base pairing rules, and Bell's early research on DNA. The video highlights the collaborative nature of scientific discovery and the importance of recognizing all contributors.

Who are the two scientists credited with discovering the double helix structure of DNA?

• Rosalind Franklin and Goslin

• Crick and Watson

• Erwin Chargaff and Jerry Donohue

• Florence Bell and William Astbury

Who did the experimental work with X-rays that Crick and Watson used?

• Rosalind Franklin and Goslin

• Florence Bell

• Jerry Donohue

• Erwin Chargaff

What did Erwin Chargaff observe about the number of adenines and thymines in DNA?

• Thymines are more than adenines

• They are always different

• They are equal

• Adenines are more than thymines

Who advised Crick and Watson about the keto form of guanine and thymine?

• Jerry Donohue

• Erwin Chargaff

• Rosalind Franklin

• Florence Bell

What did Erwin Chargaff's rules help to establish?

• Base pairing theory

• The double helix structure

• X-ray crystallography

• The structure of proteins

In what year did Florence Bell join William Astbury's lab?

• 1950

• 1941

• 1938

• 1937

What did Florence Bell and William Astbury publish about DNA in 1938?

• DNA is made of proteins

• DNA has a structure like a pile of pennies

• DNA has a double helix structure

• DNA is a single strand

Why did Florence Bell leave her research in 1941?

• To study in another field

• To work with Crick and Watson

• To join the WAAF

• To publish a book

Who was the crystallographer that worked on the structure of DNA in 1937?

• Florence Bell

• Rosalind Franklin

• Jerry Donohue

• Erwin Chargaff

What did Crick and Watson apologize for in the end?

• Not discovering DNA

• Not winning the Nobel Prize

• Not giving enough credit to others

• Publishing incorrect data