HEREDITY
MUTATIONS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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promoter
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enhancer
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operator
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gene
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Detailed explanation-1: -The “on/off” switch for an operon is called the. promoter.
Detailed explanation-2: -The catabolite activator protein and the lac repressor operon are turned on and off in response to glucose and lactose levels. Lac repressor prevents the operon from being transcribed. Lactose is a substrate for the enzyme beta-galactosidase, which controls the operon’s on/off switch. The inducer is the term for it.
Detailed explanation-3: -(Genetics) In the Operon Model, the operator is the gene in which a repressor binds. This results in the prevention of the RNA polymerase from binding to it, thus, preventing the expression of certain genes in the operon unit. Word origin: Latin operā ( rī ) (to work, effect).
Detailed explanation-4: -i) Lactose is the substrate for the enzyme -galactosidase and regulates switching on and off of the operon.