In General, a Signal Transmitted Via Phosphorylation of a Series

Multiple Choice

In general, a signal transmitted via phosphorylation of a series of proteins

A) brings a conformational change to each protein.
B) requires binding of a hormone to a cytosol receptor.
C) cannot occur in yeasts because they lack protein phosphatases.
D) requires phosphorylase activity.
E) allows target cells to change their shape and therefore their activity.