Arabinose is a monosaccharide that E. coli can use as an energy source. When bot

Question

Arabinose is a monosaccharide that E. coli can use as an energy source. When both glucose and arabinose are present in the media, a. arabinose binds the repressor, repressor function, and CAMP levels are high to Cap will bind to the DNA and transcription begins. b. arabinose binds the repressor, repressor function, and CAMP levels are high to Cap will bind to the DNA and transcription does not begins. c. arabinose binds the repressor and activates repressor function and CAMP levels are low to Cap will bind to the DNA and transcription does not begins d. arabinose binds the repressor and activates repressor function and CAMP levels are low to Cap will bind to the DNA and transcription begins. In two component regulatory systems, the response regulator typically receives a _____ from the sensor kinase when it has been activated. a. phosphoryl group b acetyl group c. methyl group d pyruvate group Transfer of genetic information via direct cell-cell contact is called _____ a. conjugation b. transduction c. transfection. d. transformation Which of the following conclusions can be made if two identical insertion sequences are identified in separate locations on a chromosome? a. The insertion sequence was transferred via simple transposition. b. A mutation occurred during transposition of the insertion sequence. C. The insertion sequence was transferred via replicative transposition. d. The insertion sequence was a "cut and paste' transposition. A _____ mutation is one that causes premature termination of the synthesis of the protein protect. a. nonsense b. silent c. missense d. none of the choices are correct. Lethal mutations can be maintained in diploid organisms if they are _____ a. dominant b. deletions c. recessive d. None of the choices are correct. In order to express eukaryotic genes in a bacterium, the _____ must first be removed. a. exons b introns

Explanation / Answer

Question: 49. Arabinose is a monosaccharide that E. coli can use as an energy source. When both glucose and arabinose are present in the media,

Answer: c. arabinose binds the repressor and activates repressor function, but cAMP levels are low so CAP will not bind to the DNA and transcription does not begin.

High levels of glucose in the environment will repress the arabinose operon due to low levels of the cAMP molecule.

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