Q. Which one is NOT a mode of action of hormones on their target cell?
A. a hormone may stimulate the synthesis of an enzyme in the target cell.
B. a hormone may activate an enzyme by altering its shape.
C. a hormone may deactivate an enzyme by altering its structure.
D. some hormones are enzymes that promote a chemical reaction in a cell.
Answer: some hormones are enzymes that promote a chemical reaction in a cell.
