The evolution of signaling molecules has made it possible for cells of multicellular organisms, such as humans, to communicate with one another in simple and complex ways. Signaling molecules may be used to transmit information between cells (extracellular or intercellular signaling), or they may be involved in signaling cascades inside cells (cytoplasmic or intracellular signaling). Test your basic knowledge of signaling molecules by taking this simple quiz.
(1) The enzyme phospholipace C (PLC) is stimulated by this G protein.
(2) Cyclic 3',5'-adenosine monophosphate (cAMP) activates the following kinase:
(3) Cyclic 3',5'-adenosine monophosphate (cAMP) is broken down by this enzyme:
(4) Once activated, __________ leads to the production of diacylglycerol (DAG) and inositol triphosphate (IP3).
(5) Inositol triphosphate (IP3) leads to the elevation of cytoplasmic __________ ions.