1.

Identify the statements pertaining to the regulatory genes (R), associated with the lac operon that are incorrect. (i) mRNA is transcribed from the R gene whether lactose is present or not. (ii) mRNA is transcribed from the R gene only when the lactose is present. (iii) mRNA is transcribed from the R gene only when the lactose is not present. (iv) Lactose inhibits the translation or R gene mRNA.

A. (i) and (ii)
B. (ii) and (iii)
C. (iii) and (iv)
D. (ii), (iii) and (iv)
Answer» E.


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