If the gene encoding the trp repressor is mutated such that it can no longer bind to tryptophan, will transcription of the trp operon occur?

No, because this mutation does not affect the part of the repressor that can bind the operator.

Yes, because the trp repressor can only bin the trp operon and block transcriptional initiation when it is bound to tryptophan.

No, because the trp operon is repressed only when tryptophan levels are high.

Yes, because the trp operon can allosterically regulate the enzymes needed to synthesise the amino acid tryptophan.

If the gene encoding the trp repressor is mutated such that it can no

1.	If the gene encoding the trp repressor is mutated such that it can no longer bind to tryptophan, will transcription of the trp operon occur?
A.	Yes, because the trp repressor can only bin the trp operon and block transcriptional initiation when it is bound to tryptophan.
B.	No, because this mutation does not affect the part of the repressor that can bind the operator.
C.	No, because the trp operon is repressed only when tryptophan levels are high.
D.	Yes, because the trp operon can allosterically regulate the enzymes needed to synthesise the amino acid tryptophan.
Answer» B. No, because this mutation does not affect the part of the repressor that can bind the operator.