NEET 2007 Biology question

One gene - one enzyme relationship was established for the first time in:

(1)Diplococcus pneumoniae
(2)Neurospora crassaCorrect
(3)Salmonella typhimurium
(4)Escherichia Coli

Answer: (2)

Solution

Beadle and Tatum (1941) exposed the red bread mould Neurospora crassa to X-rays/UV and obtained mutants that could not grow on minimal medium; each mutant lacked one enzyme of a biosynthetic pathway and the defect was inherited as a single

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Question ID VK-089776