If you were highly allergic to bee stings, which of the following would be dangerous for you to do?
A. wearing sweet-smelling perfumes.
B. wearing red shirts.
C. wearing dark, drab clothing.
D. humming as you work.
E. None of the choices provided are dangerous.
A. wearing sweet-smelling perfumes.
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The sodium-potassium pump of neurons pumps
A. Na+ and K+into the cell. B. Na+ and K+ out of the cell. C. Na+ into the cell and K+ out of the cell. D. Na+ out of the cell and K+into the cell. E. Na+ and K+into the cell and H+ out of the cell through an antiport mechanism.
Explain the process of soil formation by weathering. What will be an ideal response?
When E. coli is grown on glucose, and there is no lactose available
a. the lac repressor binds to the operator of the lac operon b. lactose molecules bind to the lac repressor c. the lac genes are transcribed into messenger RNA d. RNA polymerase binds to the promoter of the lac operon
True or False: Even when a gene or operon is "fully repressed," some basal level of transcription still occurs
a. TRUE b. FALSE