There is a mutation in the operator of the lac operon in a cell such that the lac repressor always stays bound to the operator. If lactose is added to the cell, what will happen?

A) Lactose will bind to the repressor, and lac enzymes will be produced.
B) Lactose will bind to the repressor, and lac enzymes will not be produced.
C) Lactose will not bind to the repressor, and lac enzymes will be produced.
D) Lactose will bind to the operator, and lac enzymes will be produced.


Answer: B

Biology & Microbiology

You might also like to view...

Which of these occurs during vigorous exercise?

a. glycolysis b. actin depletion c. lactate fermentation d. glycogen buildup

e. creatine phosphate formation

Biology & Microbiology

Franklin worked closely with

a. Wilkins. b. Watson. c. Crick. d. Chargaff. e. none of these.

Biology & Microbiology

The muscles of the myometrium:

A. are sloughed off during menstruation. B. create the contractions of labor and orgasm. C. form the external cover of the uterus. D. are very weak and are incapable of expanding

Biology & Microbiology

Which cleanup approach involves removing groundwater or soil from its natural setting to allow for bioremediation?

A) In situ bioremediation B) Ex situ bioremediation C) Phytoremediation D) Bioaugmentation E) None of these choices

Biology & Microbiology