GTPase Activity is Involved in the Regulation of Signal Transduction

Question

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.

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.