Which of the following is the best example of derepression?
A) Switching on of the trp operon in the presence of tryptophan
B) Switching off of the trp operon in the presence of tryptophan
C) Switching off of the trp operon in the absence of tryptophan
D) Switching off of the lac operon by the presence of glucose in the medium
E) Switching on of the lac operon in the presence of lactose
Correct Answer:
Verified
Q24: The enzyme b-galactosidase is encoded by
A) lacA.
B)
Q25: Which statement about catabolite repression is false?
A)
Q26: Which of the following is true regarding
Q27: Which of the following is a constituent
Q28: Which of the following substances is the
Q30: When are the structural genes in the
Q31: In the lac operon,what type of control
Q32: Which of the following statements is true
Q33: What type of operon is the trp
Q34: Which of the following best describes the
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