The double-helical structure of DNA was propo | vedclass

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(A) In $1953$,James Watson and Francis Crick proposed the double-helical model of $DNA$ based on $X$-ray diffraction data produced by Maurice Wilkins

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Watson and Crick

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(A) In $1953$,James Watson and Francis Crick proposed the double-helical model of $DNA$ based on $X$-ray diffraction data produced by Maurice Wilkins and Rosalind Franklin. This model describes $DNA$ as two polynucleotide chains coiled around a common axis in a right-handed fashion,with the sugar-phosphate backbone on the outside and nitrogenous bases on the inside.

The double-helical structure of $DNA$ was proposed by:

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