Question

A mutation in the operator region of the trp operon can prevent the trp repressor from binding to this operator. When these mutant cells are placed in a solution containing chicken broth, which of the following events would happen?
a. The transcription of the repressor protein is inhibited.
b. The transcription of the trp operon would be inhibited.
c. The repressor would bind to the operator irrespective of the presence of amino acids in the environment.
d. Tryptophan would bind to the repressor.

Answer 1

Answer:

d. Tryptophan would bind to the repressor

Explanation:

However,the repressor would not be able to bind to the operator and switch off transcription.The cell would still be making tryptophan even though it is being supplied by the medium in which it is growing.This is a waste of energy.