Cell signaling Knowledge-Based Download PDF

Questions

1. 1.

   What is the primary role of second messengers, such as cyclic AMP (cAMP), in an intracellular signal transduction pathway?

   • A) Relaying and amplifying the signal from the receptor to target molecules inside the cell
   • B) Transporting the extracellular ligand directly into the nucleus to alter gene expression
   • C) Directly phosphorylating transmembrane receptor proteins to terminate extracellular signaling
   • D) Acting as specialized enzymes that synthesize membrane lipids during signal reception