JIPMER2017ZoologyMolecular Basis of Inheritance
In the lac operon model, lactose molecules function as
Options
- Ainducers, which bind with the operator gene
- Brepressors, which bind with the operator gene
- Cinducers, which bind with the repressor protein
- Dcorepressors, which bind with repressor protein
Correct answer
C. inducers, which bind with the repressor protein
Step-by-step solution
Lactose or lac operon of E. coli is an example of inducible operon. Lactose is known to be the inducer and substrate for the enzyme -galactosidase. It binds with the repressor protein and changes it into a non-DNA binding state thus activating the operon.