A Protein Kinase Cascade Can Amplify an Intracellular Signal by

Multiple Choice

A protein kinase cascade can amplify an intracellular signal by

A) opening gap junctions to allow diffusion of signals from neighboring cells.
B) activating a G protein, which then binds and activates a second protein, amplifying the signal.
C) using nitric oxide to quickly diffuse into cells, amplifying the response.
D) using transcription factors to increase gene expression.
E) activating one kinase molecule that can then trigger the activation of many proteins.