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Question
Biology
Which of the following switch off lac operon
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Q. Which of the following switch off lac operon
AIIMS
AIIMS 2019
Molecular Basis of Inheritance
A
Structural gene
4%
B
Regulator gene
62%
C
Operator gene
30%
D
Promoter gene
3%
Solution:
Regulator gene codes for a protein known as repressor protein. The operon is switched off when repressor protein produced by regulator or inhibitor gene binds to operator gene and prevents RNA polymerase from transcribing the operon.