How Does a Protein Kinase Cascade Amplify an Intercellular Signal

question 77

Multiple Choice

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.

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