A water-soluble hormone binds to its receptor on the plasma membrane.Arrange the events that follow in correct sequence. (1)alpha subunit-GTP complex alters cell activity
(2)GTP binds to the alpha subunit replacing GDP
(3)G-protein subunits separate from the receptor
(4)alpha subunit separates from other two subunits
(5)G-protein subunits bind to the receptor
A)5,2,3,4,1
B)4,2,1,3,5
C)5,2,1,4,3
D)5,4,2,1,3
E)3,4,1,2,5

Question

Quizplus · Accepted Answer

When a water-soluble hormone binds to its receptor, the G-protein subunits bind to the receptor (5), GTP replaces GDP on the alpha subunit (2), the G-protein subunits separate from the receptor (3), the alpha subunit separates from the other two subunits (4), and finally, the alpha subunit-GTP complex alters cell activity (1).

A Water-Soluble Hormone Binds to Its Receptor on the Plasma