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a regulated operon is turned on in the presence of a small molecule 'X'. A mutation...

a regulated operon is turned on in the presence of a small molecule 'X'. A mutation that stops the synthesis of regulatory protein makes the operon permanently turned off. which type of regulator is the regulator protein, is it inducible or repressible? explain your answer using figures to show the operon expression in the presence and absence of regulator and also the presence and absence of the small molecule 'X'

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Answer #1

The regulatory protein is an repressor. The reason will be evident from the following figure.

R - Gene encoding the regulatory protein

P - Promoter of the operon

O - Operator region of the operon

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