Which of the following is false about the E. coli Lac operon?
A. it is an example of negative control
B. the presence of lactose acts as an inducer
C. the repressor binds to the operator
D. the mRNA for the receptor binds to the operator
Ans: D. the mRNA for the receptor binds to the operator
You might also like to view...
Frederick Griffith conducted experiments where nonlethal bacteria acquired the ability to cause lethal pneumonia due to the presence of an unknown chemical. This chemical was later found to be
a. RNA. b. a protein. c. DNA. d. nonhereditary material. e. phosphorus.
The functions of the casparian strip include all of the following EXCEPT.
A. controlling materials that enter the vascular cylinder B. enabling a one-way passage of water and nutrients into the vascular cylinder C. forcing water to pass in between cells of the endodermis D. Keeping valuable nutrients inside the vascular cylinder
What key words does the question contain and what do they mean?
What will be an ideal response?
The FDA-approved GM Atlantic salmon have a growth hormone transgene that is expressed year-round, which is advantageous because
A) the salmon is more nutritious. B) the salmon achieve their full weight faster. C) the salmon produce more offspring. D) the salmon are more resistant to infection.