GTPase activity is involved 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 binding to G protein.
D) converts cGMP to GTP.
E) phosphorylates protein kinases.

Question

Quizplus · Accepted Answer

GTPase activity hydrolyzes GTP binding to G proteins, which is important in signaling pathways involving G protein-coupled receptors. This activity helps deactivate the G protein and terminate the signal transduction pathway.

GTPase Activity Is Involved in the Regulation of Signal Transduction