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Question
According to the lac operon concept, which functional unit of the bacterial genetic material is responsible for suppressing the activity of the operator gene in the absence of lactose?
According to the lac operon concept, which functional unit of the bacterial genetic material is responsible for suppressing the activity of the operator gene in the absence of lactose?
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Solution
The correct option is D Repressor protein
In lac operon, lactose is an inducer which binds with the repressor protein. Thus preventing the repressor protein from binding with the operator gene. But in the absence of lactose, the repressor protein binds with the operator gene and supress the activity of the operator gene.
Promoter gene is sequence in operon which is recognised by RNA polymerase.
Structural genes are a group of sequences that code for different proteins/ enzymes like lac z, lac y and lac a.
In lac operon, lactose is an inducer which binds with the repressor protein. Thus preventing the repressor protein from binding with the operator gene. But in the absence of lactose, the repressor protein binds with the operator gene and supress the activity of the operator gene.
Promoter gene is sequence in operon which is recognised by RNA polymerase.
Structural genes are a group of sequences that code for different proteins/ enzymes like lac z, lac y and lac a.
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