The same E. coli that you are studying in the research lab also encode the trp o

Question

The same E. coli that you are studying in the research lab also encode the trp operon. You have isolated mutant E. coli strains that do not regulate the trp genes normally. Below is the data you have collected comparing the mutant strains to normal (wildtype). Which part of the trp operon and/or its regulatory genes is likely mutated to explain the growth results of Mutant Strain A? You may use a picture if you wish to help you explain. Which part of the trp operon and/or its regulatory genes is likely mutated to explain the growth results of Mutant Strain B? You may use a picture if you wish to help you explain.

Explanation / Answer

Ans-a in this case the trp repressor gene is mutant. This gene will have a configuration thst it will not bind to tryptophane in any situation. If the repressor will not bind to tryptophane and there will be no blocking of pathway and the gene will be expressed everytime.

Ans-b in this case any of the gene may be mutated because if any one of the regulatory or structral genes is mutated it will not work properly. They together make trp synthase, if any one is defected the pathway will be stoped

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