Biology 8th Edition by Kenneth Mason ,Jonathan Losos,Susan Singer,Peter Raven,George Johnson

تمرين 11

During a protein kinase signal cascade-
A) Sequential phosphorylation of different kinases leads to a change in gene expression.
B) Multiple G proteins become activated.
C) Phosphorylation of adapter proteins leads to the formation of second messengers.
D) The number of MAP kinase proteins present in the cytoplasm is amplified