Which example below is a protein that can hold several other relay proteins as it binds to an activated membrane receptor? Naim 01:52 AP Biology Practice Questions Which example below is a protein that can hold several other relay proteins as it binds to an activated membrane receptor? A) active transcription factor B) third messenger C) ligand D) scaffolding protein E) protein kinase Answer: D Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+