Which of the Following Correctly Ranks the Steps in the Secretory

Multiple Choice

Which of the following correctly ranks the steps in the secretory pathway?
1) Ligand (hormone) binds to receptor.
2) Activated adenylate cyclase produces cAMP from ATP.
3) G protein ? subunit exchanges bound GDP for GTP.
4) cAMP binds to the regulatory subunits of PKA, activating it.
5) G? subunit dissociates from complex and activates adenylate cyclase.
6) Active PKA subunits phosphorylate targets in the cell, regulating function.
7) The catalytic subunits of PKA dissociate.

A) 1, 2, 5, 4, 6, 7, 3
B) 1, 3, 5, 2, 4, 7, 6
C) 2, 4, 1, 3, 5, 6, 7
D) 2, 4, 3, 5, 4, 6, 7
E) 1, 3, 4, 2, 5, 7, 6