試題詳解

40. The cholera toxin does not allow GTP to be hydrolyzed to GDP. What effects of cholera toxin would you expect to see in the cell?
(A) The inactivation of ligand-gated ion channels
(B) The inactivation of G-protein linked signaling pathways
(C) The activated G proteins would remain locked in the "on" position, transmitting signal even in the absence of signaling molecule
(D)All of the cAMP would be used up
(E)All of above