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Meselson-Stahl's Experiment

Write a brief...

Question

Write a brief account of the contributions made by J. D. Watson, F.H.C. Crick and M.H.F. Wilkins.

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Solution

Watson and Crick
- gave the double helical structure of DNA
- proposed a scheme of replication of DNA

Wilkins
- Along with Rosalind Franklin produced X-diffractions of DNA which led to the deduction of 3-D DNA structure by Watson and Crick
- discovered DNA is shaped like a twisted ladder

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Q. The double helical model of the DNA was proposed by Watson and Crick based on that what data produced by Wilkins and Franklin?

Q. Wilkins familiarized the results of high resolution X-ray photographs of crystallized DNA obtained by Franklin to Watson and Crick. What values were shown by him?

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Q. Describe the DNA structure worked by Watson and Crick.

Q. Choose the correct answer from the alternatives given :
Watson and Crick (1953) proposed DNA double helix model and won the Nobel Prize; their model of DNA was based on
(i) X-ray diffraction studies of DNA done by Wilkins and Franklin
(ii) Chargaffs base equivalence rule
(iii) Griffiths transformation experiment
(iv) Meselson and Stahls experiment.

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