The use of CAP- cAMP complex as a positive regulator is specific to the lac operon
Indicate whether the statement is true or false
FALSE
Explanation: CAP protein and its need for cAMP are part of a general catobolite repression mechanism. Bacterial cells that have plenty of their preferred carbon source (glucose) limit the expression of genes used for alternative, non-preferred energy sources.
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The enhanced selectivity of tandem affinity purification (TAP) is due to:
A. two different tags?calmodulin-binding protein and protein A?that are fused to the protein of interest and allow consecutive rounds of affinity chromatography. B. the presence of a TEV cleavage site in the fusion protein. Cleavage of this site further purifies the protein by cleaving of the protein A tag. C. the fusion of a Gal4p DNA binding domain to the protein along with protein A. These two tags allow for purification of the fusion protein. D. the calmodulin-binding protein tag, which binds strongly to calmodulin. E. All of these choices contribute to the enhanced selectivity.
For a population to persist, which needs to be true?
A) P = 0 B) P > 0 C) P < 0 D) P < C
Integrins bind to
a. collagen. b. fibronectin. c. laminin. d. All of the above
Schistosomiasis involves
A. a blood fluke. B. a life cycle stage which continues when eggs from humans enter water and develop into miracidia. C. cercariae which penetrate hair follicles and pass to the blood and then the liver. D. snails which enable development of the parasite into cercaria. E. All of the choices are correct.