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(a) : In $1948$, Beadle and Tatum proposed one&shy; gene one&shy;enzyme hypothesis which states that a gene controls metabolic machinery of the organi

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Beadle and Tatum

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(a) : In $1948$, Beadle and Tatum proposed one&shy; gene one&shy;enzyme hypothesis which states that a gene controls metabolic machinery of the organism through synthesis of an enzyme. This laid the foundation of biochemical genetics. Beadle and Tatum were awarded Nobel Prize in $1958$. This one gene one enzyme theory has been changed to one gene one polypeptide hypothesis proposed by Yanofsky. $i.e.$, one gene synthesizes one polypeptide and many polypeptides form one enzyme.

One geneone enzyme hypothesis was postulated by

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One gene­one enzyme hypothesis was postulated by