Select the two correct statements out of the four (i-iv) statements given below about the lac operon.(i) Glucose or galactose may bind with the repressor and inactivate it.(ii) In the absence of lactose, the repressor binds with the operator region.(iii) The z-gene codes for permease.(iv) This was elucidated by Francois Jacob and Jacques Monod.The correct statements are:
Correct answer: C. (ii) and (iv)
- A. (ii) and (iii)
- B. (i) and (iii)
- C. (ii) and (iv)
- D. (i) and (ii)
Explanation
The two French scientists, Jacob and Monod, proposed the lac operon of E.coli. The lac operon (an inducible operon) contains a promoter, an operator, a regulator gene, and three structural genes z, y, and a, coding for the enzyme b-galactosidase, b-galactoside permease, and b-galactoside, respectively.
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