Lac operon is called negative regulation because__________

Q. Which of the following statements are true about lac operon?
I. In the absence of lactose, the repressor binds with the operator region.
II. All three structural genes in the operon are not essential for the metabolism of lactose.
III. The operator is a negative regulatory site bound by the lac repressor protein.

Q. the statements regarding the lac operon and choose the correct option.
1. An inducer regulates the switching on and off of lac operon. 2. Repressor protein dissociates from the operator region and prevents RNA polymerase from transcribing the operon.
3. In the presencRead e of lactose, the repressor is activated by interaction with lactose.
4. RNA polymerase has access to the promoter and transcription proceeds only when the repressor is inactivated.

Q. List the structural genes involved in the digestion of lactose in E coli. Highlight the function of any one. What triggers the transcription of these genes?

Q. Gene regulation governing lactose operon of E.coli that involves the lac gene product is