What is cell signaling the process a cell goes through befor
     What is cell signaling?  the process a cell goes through before it becomes functional  nerve impulses that cause motion  biochemical reactions that convey a message to a DNA promoter  the process of protein catabolism 
  
  Solution
Cell signalling is the:
c, Biochemical reactions that convey a message to a DNA promoter.
This is a cascade of biochemical and molecular events, which involves processes like phosphorylation, dephosphorylation , etc, and apass the signalling process to turn on or turn off the transcription of specific genes.
So through cell signalling DNA promoter gets message to start or shut down a transcription process.

