Molecular Genetics of Prokaryotes Problem Set

Problem 14: Effect of the absence of glucose


An E. coli cell is grown in the absence of glucose. Which of the following will be true?

A. The level of cyclic AMP will be low.
B. The CRP protein cannot bind to the DNA.
C. If lactose is present, lac mRNA synthesis will occur at a high level.
Lactose is metabolized if glucose is absent.
D. The cell will manufacture glucose by fixing carbon dioxide.
E. The cell will be forced to carry out fermentation.

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Updated: July 15, 1999
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