How Does a Protein Kinase Cascade Amplify an Intercellular Signal

question 9

Multiple Choice

How does a protein kinase cascade amplify an intercellular signal?

• A) Protein kinase molecules open 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) Sequential activation of protein kinases can lead to the activation of thousands of effector proteins.

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