If she moves the repressor gene (lacI), along with its promoter, to a position at some several thousand base pairs away from its normal position, we would expect the _____
A) repressor will no longer be made
B) repressor will no longer bind to the operator
C) repressor will no longer bind to the inducer
D) lac operon will be expressed continuously
E) lac operon will function normally
Answer: E
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The structure labeled 9 in Figure 29-2 was produced by:
a. fertilization of two zygotes. b. meiosis in the resting sporangium. c. meiosis in the zoosporangium. d. mitosis in the resting sporangium. e. mitosis in the zoosporangium.
The difference between simple diffusion and facilitated diffusion is that facilitated diffusion
A) Can move materials from a higher to a lower concentration. B) Can move materials from a lower to a higher concentration. C) Requires ATP. D) Requires transporter proteins. E) Doesn't require ATP.
Hydrophobic molecules would enter a cell
a. through integral transport proteins. b. by passive transport directly across the membrane. c. by active transport directly across the membrane.
All of the following can positively influence the structure of tooth enamel except
A. antibodies in saliva. B. fluoride. C. genetics. D. lysozyme in saliva. E. refined sugar.