<prompt> Out of the four layers, which cells of are the most active for protein synthesis:Spinous cell.Basal cell.Granular cell.Corneum cell.  <response>: The spinous prickle cells resemble a cocklebur or sticker that has each spine ending at a desmosome. Of the four layers, the spinous cells are the most active in protein synthesis. These cells synthesize additional proteins that differ from those made in the basal cells. 