E) None of the above 37) Using the biosynthesis of p-galactosidase as an example

Question

E) None of the above 37) Using the biosynthesis of p-galactosidase as an example of enzyme induction, which of the following condition inhibit its production? A) The absence of lactose B) The presence of lactose C) The absence of maltose D) The presence of maltose E) None of the above 38) In enzyme induction, the repressor protein is bound to the operator when... A) A corepressor is present. B) An inducer is present C) An inducer is absent. D) An activator protein is present. E) None of the above 39) Positive control of the genes for maltose utilization depends on A) The presence of an activator protein B) The presence of an activator protein binding site C) The presence of maltose D) All of the above E) A and B

Explanation / Answer

37- the absence of lactose

38- an inducer is absent

39- D all of above

Note - the inducer binder to repressor protein and allow the operon to carry out its function of transcription in case of lactose it transcribe beta galactosidase.

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