Which of the following statements about enzyme-linked receptor is false ?
A.An enzyme-linked receptor is a transmembrane domain receptor, where the binding of an extracellular ligand causes enzymatic activity on the intracellular side
B.A enzyme-linked receptor has an extracellular ligand-binding domain, a transmembrane domain, and an intracellular catalytic domain.
C.The signal transduction pathways of enzyme-linked receptor involve phosphorylation cascades.
D.Enzyme-linked receptor interacts with an intracellular protein called a "G-protein".