Ask Question
31 October, 08:30

In negative control of transcription by the lac operon, how does the presence of an inducer affect transcription?

a) the inducer prevents the repressor from binding to the operator

b) the inducer binds to the operator

c) the inducer causes the repressor to bind to the operator

d) the inducer does not bind to the operator

+5
Answers (1)
  1. 31 October, 08:49
    0
    The correct answer is a) the inducer prevents the repressor from binding to the operator

    Explanation:

    In lac operon lac I gene synthesize repressor protein that binds to the operator region of the lac operon and inhibits the transcription of the mRNA by partially blocking the promotor region of lac operon where RNA polymerase binds.

    When the inducer is present it binds to the repressor protein and makes a conformation change in the protein as a result repressor protein is not able to bind the operator region of the operon and do not able to block the transcription of the lac operon.

    Therefore in the presence of inducer transcription of operon occurs so the right answer is a) the inducer prevents the repressor from binding to the operator.
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “In negative control of transcription by the lac operon, how does the presence of an inducer affect transcription? a) the inducer prevents ...” in 📗 Biology if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers