In the Ras-Raf Signaling Pathway,MEK Phosphorylates the Protein Kinase ERK

question 18

Multiple Choice

In the Ras-Raf signaling pathway,MEK phosphorylates the protein kinase ERK to activate it.What does activated ERK do?

• A)phosphorylate a variety of cytoplasmic proteins
• B)move into the nucleus
• C)phosphorylate and activate several activators in the nucleus
• D)phosphorylate and activate Elk-1 in the nucleus
• E)all of the above

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