The receptors for a group of signaling molecules known as growth factors are often Biology The receptors for a group of signaling molecules known as growth factors are often A) ligand-gated ion channels. B) G protein-coupled receptors. C) cyclic AMP. D) receptor tyrosine kinases. E) neurotransmitters. Answer: D Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+
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