Concept explainers
(a)
To describe: The effect of repressor mutation on the regulation of lac operon such that it no longer binds the operator.
Introduction: The operon is the cluster of functionally related genes that are controlled by a shared operator. They consist of multiple genes grouped together with a promoter and an operator. They are present in prokaryotes and absent in eukaryotes. Examples are lac operon, trp operon, and arc operon.
(b)
To describe: The effect of repressor mutation on the regulation of lac operon such that it no longer binds the allolactose.
(c)
To describe: The effect of promoter mutation on the regulation of lac operon such that it no longer binds the RNA polymerase.
(d)
To describe: The effect of operator mutation on the regulation of lac operon such that it no longer binds the repressor.
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