Answer:
(1) Their chemical structure is critical to their ability to function.
Step-by-step explanation:
All enzymes, antibodies, and hormones have a similarity like they all have a particular and unique chemical structure which is critical to their ability to function. If they lose their shape then they will lose their function because in enzyme there are active site which have a particular shape in which substrate will bind.
Each antibody bind to specific antigen according to the chemical shape they have and hormone also binds to their receptor so they should have that shape that can fit into the receptor.