Who among the following shared the Nobel Prize in 1962 along with Francis Crick and James Watson for their discoveries concerning the molecular structure of nucleic acids?
Maurice Hugh Frederick Wilkins
Understanding the 1962 Nobel Prize in DNA Structure
The question asks about the individuals who were awarded the Nobel Prize in Physiology or Medicine in 1962 for their significant work on the structure of nucleic acids, specifically DNA.
This Nobel Prize was a landmark event recognizing the discovery of the double helix structure of DNA. The prize was shared among three scientists.
Analyzing the Nobel Laureates
The Nobel Prize in 1962 for discoveries concerning the molecular structure of nucleic acids and its significance for information transfer in living material was awarded jointly to:
- Francis Crick
- James Watson
- Maurice Hugh Frederick Wilkins
Francis Crick and James Watson are famously known for building the accurate model of the DNA double helix. Maurice Wilkins's contribution was critical in providing the X-ray diffraction data from DNA fibers, which was essential evidence used by Watson and Crick to deduce the structure.
Evaluating the Options
Let's look at the other scientists mentioned in the options and their contributions to the field of DNA research:
- Erwin Chargaff: Known for 'Chargaff's rules', which stated that in DNA, the amount of adenine (A) is equal to the amount of thymine (T), and the amount of guanine (G) is equal to the amount of cytosine (C). His work was fundamental but he did not share the 1962 Nobel Prize.
- Maurice Hugh Frederick Wilkins: As discussed, he shared the 1962 Nobel Prize with Watson and Crick for his crucial X-ray diffraction studies of DNA.
- Rosalind Franklin: A brilliant scientist who also produced high-quality X-ray diffraction images of DNA, including the famous 'Photo 51'. Her work was vital to the discovery of the double helix. However, Nobel Prizes are not awarded posthumously, and she passed away in 1958, before the prize was awarded in 1962.
- Phoebus Levene: An early pioneer in nucleic acid chemistry. He identified the components of DNA (deoxyribose sugar, phosphate, and nitrogenous bases) and proposed the tetranucleotide hypothesis, which was later shown to be incorrect regarding the structure. His work predates the detailed structural studies of the 1950s.
Conclusion
Based on the historical records of the 1962 Nobel Prize in Physiology or Medicine, Maurice Hugh Frederick Wilkins was the third recipient who shared the award with Francis Crick and James Watson for their discoveries regarding the molecular structure of nucleic acids.
Revision Table: DNA Structure Nobel Prize
| Scientist | Key Contribution to DNA Structure | Shared 1962 Nobel Prize? |
|---|---|---|
| James Watson | Co-built the DNA double helix model | Yes |
| Francis Crick | Co-built the DNA double helix model | Yes |
| Maurice Wilkins | Provided essential DNA X-ray diffraction data | Yes |
| Rosalind Franklin | Produced high-quality DNA X-ray diffraction images (e.g., Photo 51) | No (Died in 1958) |
| Erwin Chargaff | Discovered base pairing rules (A=T, C=G) | No |
| Phoebus Levene | Identified DNA components, proposed tetranucleotide hypothesis | No |
Additional Information on DNA Discovery
The discovery of the structure of DNA is one of the most significant scientific achievements of the 20th century. It provided the fundamental basis for understanding how genetic information is stored, replicated, and transmitted. While Watson, Crick, and Wilkins received the Nobel Prize, it is important to acknowledge the foundational work of many other scientists, including Rosalind Franklin and Erwin Chargaff, whose contributions were indispensable to the eventual discovery of the double helix.
The structure revealed by Watson and Crick showed that DNA consists of two polynucleotide chains that coil around a central axis to form a double helix. The sugar-phosphate backbones are on the outside, and the nitrogenous bases (Adenine, Thymine, Guanine, Cytosine) are on the inside. The bases pair specifically: Adenine always pairs with Thymine (\(A-T\)), and Guanine always pairs with Cytosine (\(G-C\)), held together by hydrogen bonds. This specific base pairing rule, previously identified by Chargaff, explained how the genetic information could be accurately copied during cell division.
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