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
A
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