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Wilkin's X-ray diffraction showed the di...

Wilkin's X-ray diffraction showed the diameter of the DNA helix as `:`

A

`10 Å`

B

`20 Å`

C

`30Å`

D

`40Å`

Text Solution

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The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding the Question**: The question asks about the diameter of the DNA helix as determined by Wilkins' X-ray diffraction studies. 2. **Recalling Wilkins' Findings**: Wilkins conducted X-ray diffraction experiments that provided crucial information about the structure of DNA. 3. **Identifying Key Measurements**: From the findings, it is noted that: - The diameter of the DNA helix is approximately 20 angstroms. - The pitch of the helix (the distance for one complete turn of the helix) is about 34 angstroms. - The radius of the helix is about 10 angstroms. 4. **Conclusion**: Based on Wilkins' X-ray diffraction data, the diameter of the DNA helix is established to be around 20 angstroms. 5. **Final Answer**: Therefore, the correct answer to the question is 20 angstroms. ---
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