A functional complex comprising a cluster of genes including structural genes, a promoter gene, an operator region and a regulatory gene was discovered by :A. Jacob and Monod (1961)B. Beadle and Tatum (1958)C. Waston and Crick (1953)D. Britten and Davidson (1969)

A functional complex comprising a cluster of genes including structura

1.	A functional complex comprising a cluster of genes including structural genes, a promoter gene, an operator region and a regulatory gene was discovered by :A. Jacob and Monod (1961)B. Beadle and Tatum (1958)C. Waston and Crick (1953)D. Britten and Davidson (1969)
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In operon concept, the operator gene combines with :A. regulator gene to switch off structural gene transcriptionB. inducer to switch off structural gene transcriptionC. regulator protein to switch on structural gene transcriptionD. regulator protein to switch off structural gene transcription
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A functional complex comprising a cluster of genes including structural genes, a promoter gene, an operator region and a regulatory gene was discovered by :A. Jacob and Monod (1961)B. Beadle and Tatum (1958)C. Waston and Crick (1953)D. Britten and Davidson (1969)

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