Certain mutations in the regulator gene of the lac system in E. coli result in maximal synthesis of the Lac proteins (?-galactosidase, etc.) even in the absence of the inducer (lactose). Provide an explanation for this observation
What will be an ideal response?
There has been a mutation in the gene that produces the repressor, or the operator is mutated so that it will not interact with the repressor.
You might also like to view...
In the accompanying figure, a(n) ________ glacier is out away from mountains into the lowlands.
The process where two gametes fuse with each other in the process of fertilization to begin the life of a new organism is called
A. sexual reproduction. B. gametogenesis. C. asexual reproduction. D. X-linked inheritance. E. multicellularity.
The sense of balance relies on information from all of the following EXCEPT ____
a. eyes b. cochlea c. skin d. joints e. vestibular apparatus
In a lichen, the fungal partner ________.
A. provides a substratum within which the alga grows B. protects the alga from excess light intensities C. provides water and minerals to the alga D. All of the choices are correct.