Which of the Following Organisms Would Produce Functional Lac Products

Question

Which of the following organisms would produce functional lac products in the presence of IPTG? A)I^s O^c Z^- Y⁺ A⁺ B)I^s O^c Z^- Y^- A^- C)I⁺ O⁺ Z⁺ Y⁺ A⁺ D)I^-O^c Z⁺ Y⁺ A⁺ E)Both I^s O^c Z^- Y⁺ A⁺ and I^s O^c Z^- Y⁺ A⁺ are correct

Accepted Answer

The "+" indicates a functional lac product. Therefore, only the organisms with a "+" for both the S1 and S2 sites will produce functional lac products in the presence of IPTG. Therefore, option C (I⁺ O⁺ Z⁺ Y⁺ A⁺) is the correct answer.