Through genetic engineering, you replace a specific second messenger in a cell's signaling system with a new second messenger whose molecule has a greatly increased lifetime. How will this change most likely affect the ability of the cell to respond to signaling events that depend on this pathway? 

 

Signaling will be more efficient unless a negative feedback system is present in the signaling pathway Signaling efficiency will be unchanged Signaling through this pathway will be less efficient Signaling through this pathway will be more efficient Signaling might be more efficient or less efficient; it depends on whether the steady-state level of the second messenger increases or decreases