Suppose the lacI repressor gene were permanently silenced by an alteration to the DNA sequence

What would be the impact on the expression of the lac operon?



a. The lac operon would be transcribed but at a low level.
b. The lac operon would be transcribed at a high level.
c. There would be no real impact on lac operon expression.
d. The lac operon would only be expressed when lactose was present.
e. The lac operon would not be expressed even when lactose was present.


B

Biology & Microbiology

You might also like to view...

A species that is involved in a facultative mutualism with another:

A. can utilize a variety of different resources. B. is reliant on the relationship for survival. C. will most likely co-evolve with the other species. D. should quickly develop adaptations in direct response to the other species. E. can only interact with that particular species.

Biology & Microbiology

Chemical inhibitors of hormone synthesis or signaling are powerful tools that yield invaluable information about hormone function.  Triadimefon, propiconazole, and spironolactone are just a few of the compounds identified to inhibit the function of brassinosteroids (BR). Which of the following are probable physiological effects due to the inhibition of BR? Check all that apply.  

_____  reduced mitotic activity _____  rapid aging _____  reduced xylem and phloem differentiation _____  increased stem length Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean?   Gather Content · What do you already know about brassinosteroids? How does it relate to the question?   Consider Possibilities   · What other information is related to the question? Which information is most useful?   Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?

Biology & Microbiology

Why are chytrid fungi of such keen research interest to biologists?

What will be an ideal response?

Biology & Microbiology

The deepest water of an ocean in deep-sea trenches and canyons is referred to as the hadalpelagic zone

Indicate whether the statement is true or false

Biology & Microbiology