Podcast
Questions and Answers
What was the significance of Photograph 51?
What was the significance of Photograph 51?
- It was the first photograph of DNA ever taken.
- It disproved the existence of DNA.
- It revealed the helical structure of DNA. (correct)
- It showed the triple helix model of DNA.
What did Franklin propose about the structure of DNA?
What did Franklin propose about the structure of DNA?
- The backbone lay on the outside of the molecule. (correct)
- The backbone was made of proteins.
- The DNA molecule was a single strand.
- The DNA strands were parallel.
Who was shown Photograph 51 without Franklin's knowledge?
Who was shown Photograph 51 without Franklin's knowledge?
- Francis Crick and James Watson (correct)
- Alexander Todd
- J. D. Bernal
- Linus Pauling
In what year was the model of the DNA structure published by Crick and Watson?
In what year was the model of the DNA structure published by Crick and Watson?
Where did Franklin move to in 1953, and what did she study there?
Where did Franklin move to in 1953, and what did she study there?
With which virus did Franklin achieve a groundbreaking modeling success using her crystallography skills?
With which virus did Franklin achieve a groundbreaking modeling success using her crystallography skills?
What was one of the critical outcomes of Franklin’s X-ray research at King’s College?
What was one of the critical outcomes of Franklin’s X-ray research at King’s College?
Flashcards
Photograph 51
Photograph 51
The first clear image of DNA's crystalline structure, taken by Rosalind Franklin.
Rosalind Franklin
Rosalind Franklin
Scientist who produced Photograph 51 and contributed to DNA research.
DNA structure
DNA structure
DNA is composed of two helical strands, forming a double helix.
Maurice Wilkins
Maurice Wilkins
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Double helix model
Double helix model
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Tobacco Mosaic Virus (TMV)
Tobacco Mosaic Virus (TMV)
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Crystallography
Crystallography
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Study Notes
DNA X-Ray Photography
- Photograph 51 captured the first clear image of DNA's crystalline structure, a significant scientific achievement.
- Rosalind Franklin took the photograph, a crucial element in understanding DNA's structure.
- Franklin's X-ray diffraction image revealed DNA's helical structure, consisting of two strands.
- Franklin also proposed that the DNA backbone lay on the outside of the molecule.
- Other researchers, without Franklin's knowledge, utilized her data to construct their own model of DNA.
- James Watson and Francis Crick, independently, used Franklin's data to develop their double helix model of DNA.
- Although Franklin's contributions were key, her crucial role was not fully recognized at the time.
- Franklin shifted her focus from studying DNA, to the structure of Tobacco Mosaic Virus (TMV).
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