DNA Historical Contributors

Who discovered the double helix structure of DNA?

• Gregor Mendel

• Rosalind Franklin And Maurice Wilkins

• Erwin Chargaff

• James Watson and Francis Crick

What technique did Rosalind Franklin use to capture the famous "Photo 51"?

• X-ray crystallography
• Mass spectrometry

• Nuclear magnetic resonance
• Electron microscopy

Erwin Chargaff is famous for discovering Chargaff's rules. What does Chargaff's rule state?

• The amount of adenine equals the amount of thymine, and the amount of guanine equals the amount of cytosine in DNA.

• The amount of adenine equals the amount of guanine in DNA.

• The amount of thymine equals the amount of cytosine in DNA.

• DNA consists of equal amounts of all four nitrogenous bases.

Maurice Wilkins shared the Nobel prize with Watson and crick in 1962. What was his specific role in the Nobel Prize - winning Discovery?

• He invented the electron microscope.

• He worked with Rosalind Franklin on X-Ray diffraction images of DNA

• He proposed the idea of the triple helix.

• He was the first to synthesize DNA.

James Watson, along with Francis Crick, proposed the double helix model of DNA in 1953. What major contribution did Watson make to the Discovery?

• Watson's major contribution was his role in proposing the double helix structure of DNA.
• Watson's major contribution was identifying the genetic code.
• Watson discovered the structure of RNA in 1953.
• Watson proposed the theory of evolution alongside Crick.