Which Is the Correct Order of the Steps in a Generalized

Multiple Choice

Which is the correct order of the steps in a generalized signal transduction pathway?

A) Signal molecule activates target cell, target cell binds to receptor, receptor is activated
B) Signal molecule is secreted by nearby cell, signal molecule enters cell, signal activates receptor
C) Signal molecule enters nucleus, signal molecule binds to DNA, transcription of specific genes occurs
D) Signal molecule binds to extracellular region of receptor, signal molecule diffuses through cell membrane, signal is transduced to nucleus where specific genes are turned on or off
E) Signal molecule binds to receptor, molecules within cell transduce signal, cell responds