Biology 2nd Edition by Robert Brooker, Eric Widmaier ,Linda Graham ,Peter Stiling

Exercise 11

All cells of a multicellular organism may not respond in the same way to a particular ligand (signaling molecule) that binds to a cell surface receptor. The difference in response may be due to
A) the type of receptor for the ligand that the cell expresses.
B the affinity of the ligand for the receptor in a given cell type.
C) the type of signal transduction pathways that the cell expresses.
D) the type of target proteins that the cell expresses.
E) all of the above.