The Earliest Consequence of an Increase in the Level of Cyclic

Multiple Choice

The earliest consequence of an increase in the level of cyclic AMP in muscle cells will be

A) stimulation of adenylate cyclase.
B) inhibition of phosphodiesterase.
C) dissociation of the catalytic subunit of protein kinase from the regulatory subunit.
D) phosphorylation of phosphorylase b kinase.
E) increased rate of glycogen breakdown.