How does a protein kinase cascade amplify an intercellular signal?
A) Protein kinase opens cell junctions, amplifying the intercellular signal.
B) The activated G protein binds and activates a second protein, amplifying the signal.
C) Nitric oxide opens cell channels, which allows protein kinase molecules to move quickly from cell to cell.
D) Second messengers create shortcuts that create multiple cascades.
E) One activated receptor kinase molecule can trigger the activation of thousands of proteins.

Question

Quizplus · Accepted Answer

A protein kinase cascade can amplify an intercellular signal because one activated receptor kinase molecule can trigger the activation of multiple downstream proteins. This leads to a chain reaction of enzymatic activity and amplification of the initial signal. Each activated protein kinase can activate multiple downstream kinases, each of which can activate multiple others, leading to a cascade effect and significant amplification of the signal.

How Does a Protein Kinase Cascade Amplify an Intercellular Signal