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10. Cell Signaling

10. Cell Signaling / Signal Amplification / Problem 7

How does the signaling molecule outside the cell trigger the phosphorylation cascade inside the cell?

A

It enters the cell through a protein channel.

B

It binds to the receptor, causing it to change conformation.

C

It releases signals that trigger phosphorylation.

D

It changes its form to be permeable to the plasma membrane.

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