In an inducible operon, the genes are
Options
(a) Always expressed
(b) Usually not expressed unless a signal turns them “on”
(c) Usually expressed unless a signal turns them “off”
(d) Never expressed
Correct Answer:
Usually not expressed unless a signal turns them “on”
Explanation:
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Lac operon is a type of inducer operon.The operon expresses its gene only in the presence of an inducer i.e Lactose it destroys the repressor proteins and now the structural genes are expressed