The lactose operon is likely to be transcribed when _____
A) there is more glucose in the cell than lactose
B) there is glucose but no lactose in the cell
C) the cyclic AMP and lactose levels are both high within the cell
D) the cAMP level is high and the lactose level is low
C
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a. the first term only b. the second term only c. both the first and second terms d. neither the first nor the second term
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A. proviruses. B. virulent. C. phages. D. lytic.
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A. CFCs. B. water vapor. C. ozone. D. carbon dioxide. E. nitrogen.
A chemical agent that kills pathogenic microbes in general is a(n)
A. sanitizer. B. germicide. C. disinfectant. D. fungicide. E. antiseptic.