10. Cell Signaling
Classes of Signaling Receptors
Multiple Choice
Multiple ChoiceIf a modified form of GTP that cannot be enzymatically converted to GDP were added to a culture of cells, the likely result would be __________.
A
the inactivation of ligand-gated ion channels
B
the inactivation of G-protein-coupled signaling pathways
C
the inhibition of pathways stimulated by tyrosine-kinase receptors
D
receptor tyrosine kinases would be stimulated by the additional phosphate groups present in the modified GTP
E
that the activated G proteins would remain locked in the "on" position, transmitting signal even in the absence of a signaling molecule
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