GTPase Activity Is Important in the Regulation of Signal Transduction

Multiple Choice

GTPase activity is important in the regulation of signal transduction because it

A) increases the available concentration of phosphate.
B) decreases the amount of G protein in the membrane.
C) hydrolyzes GTP to GDP, thus shutting down the pathway.
D) converts cGMP to GTP.
E) phosphorylates protein kinases.