If there are mutations that inactivate lacP and lacI, which of the following is true? (I = lac repressor gene; Z, Y, A = lac operon structural genes; P = lac promoter; O = lac operator)
A)These are mutations that are, respectively, cis- and trans-acting on lac operon expression.
B)These are mutations that are, respectively, trans- and cis-acting on lac operon expression.
C)These will affect the expression of I only.
D)These will affect the expression of only Z, Y, and A.
E)These mutations will have no effect.

Question

If there are mutations that inactivate lacP and lacI, which of the following is true? (I = lac repressor gene; Z, Y, A = lac operon structural genes; P = lac promoter; O = lac operator) 
A)These are mutations that are, respectively, cis- and trans-acting on lac operon expression. 
B)These are mutations that are, respectively, trans- and cis-acting on lac operon expression. 
C)These will affect the expression of I only. 
D)These will affect the expression of only Z, Y, and A. 
E)These mutations will have no effect.

Quizplus · Accepted Answer

The Answer of If there are mutations that inactivate lacP and lacI, which of the following is true? (I = lac repressor gene; Z, Y, A = lac operon structural genes; P = lac promoter; O = lac operator) 
A)These are mutations that are, respectively, cis- and trans-acting on lac operon expression. 
B)These are mutations that are, respectively, trans- and cis-acting on lac operon expression. 
C)These will affect the expression of I only. 
D)These will affect the expression of only Z, Y, and A. 
E)These mutations will have no effect.

If There Are Mutations That Inactivate LacP and LacI, Which