Refer to the Table Below

Multiple Choice

Refer to the table below. The table lists three different biological responses that result from cAMP-mediated signal transduction pathways.The "yes" and "no" references indicate which cells are capable of displaying the three biological responses.This information provides evidence in support of which statement about signal transduction pathways?

A) At each step in a signal transduction pathway, the signal is amplified.
B) A signal often initiates a cascade of events in which proteins interact with other proteins that interact with still other proteins until the final response is achieved.
C) The same second-messenger molecule can be used in many different signal transduction pathways.
D) Signal transduction pathways must be regulated so they can be turned on or off, depending on the cell's needs.
E) Most signaling molecules and second messengers are solutes that remain dissolved in either the aqueous or the hydrophobic components of cells.