G Protein-Adenyl Cyclase Activity Has Been Shown,in Some Cases,to Be

question 19

Multiple Choice

G protein-adenyl cyclase activity has been shown,in some cases,to be associated with certain diseases.In the case of cholera,which of the following is not correct?

• A)Vibrio cholera bacteria colonize the gut.
• B)Cholera toxin is secreted by Vibrio cholera bacteria.
• C)The cholera toxin causes the cells of the gut to take in salts and fluids.
• D)Cholera toxin alters Gs so that it no longer hydrolyzes GTP.
• E)The toxin, by altering Gs, keeps intracellular cAMP levels high and doesn't allow them to decrease.

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