KCET · BIOLOGY · STD 12 - 5. Molecular Basis of Inheritance
When Escherichia coli cells are cultured in a medium where Lactose is absent, the 'i' gene of Lac Operon continues to produce repressor mRNA, because it is
- A a structural gene
- B a non-coding gene
- C an operator gene
- D a constitutive gene
Answer & Solution
Correct Answer
(D) a constitutive gene
Step-by-step Solution
Detailed explanation
(D) a constitutive gene,
The lac operon consists of one regulatory gene (the i gene - it is a constitutive gene, here the term i does not refer to inducer, rather it is derived from the world inhibitor) and three structural genes (z, y and a).
The lac operon consists of one regulatory gene (the i gene - it is a constitutive gene, here the term i does not refer to inducer, rather it is derived from the world inhibitor) and three structural genes (z, y and a).
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