What happen to lac operon in the absence of lactose? Options: A . &nbsplac operon is switched off B . &nbsplac operon is active C . &nbsprepressor protein bind to promoter D . &nbspRNA polymerase binds to operator

What happen to lac operon in the absence of lactose?

Question

What happen to lac operon in the absence of lactose?

Options:

A . lac operon is switched off

B . lac operon is active

C . repressor protein bind to promoter

D . RNA polymerase binds to operator

Answer: Option A

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Question 1. What is the enzyme that detoxifies other molecules entering the cell via the permease?....

Question 2. An operon consists of all the the following EXCEPT....

Question 3. What is the basic role of mRNA?....

Question 4. Which of the following is active in the absence of lactose?....

Question 5. What is the name of the stretch of DNA where RNA polymerase binds?....

Question 6. Which sentence is TRUE about structural genes in the absence of lactose?....

Question 7. How can a person's muscle cells have the same exact DNA sequences as their nerve cells even though the look and perform....nerve cells even though the look and perform completely different?

Question 8. The lac Z gene codes for:....

Question 9. RNA is synthesized on a DNA template in a process called ______, which utilizes the enzyme _______....

Question 10. Once transcription has been completed, which of the following is NOT necessary for protein synthesis to occur?....

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