Action of alpha subunit of G-protein is:
Ans. (C) Breakdown of GTP to GDP(Ref: KDT 8th/e p54)Alpha subunit of G protein contains GTPase activity and thus dissociates GTP to form GDP. This result in re-uniting a subunit with b and g subunit
Binding of agonist
Conversion of GDP to GTP
Breakdown of GTP to GDP
Internalization of receptors
General Pharmacology