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Question

Which organism was used by Beadle and Tatum to propose one gene-one enzyme hypothesis?

A
E. coli
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B
Nostoc
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C
Drosophila
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D
Neurospora
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Solution

The correct option is B Neurospora
The one gene - one enzyme hypothesis is the idea that genes act through the production of enzymes, with each gene responsible for producing a single enzyme that in turn affects a single step in a metabolic pathway. The concept was proposed by George Beadle and Edward Tatum in an influential 1941 paper on genetic mutations in the mold Neurospora crassa.

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