How Does the Insulin Receptor Differ from the Erythropoietin Receptor

Multiple Choice

How does the insulin receptor differ from the erythropoietin receptor?

A) Upon binding its signal molecule, the insulin receptor has two-fold symmetry, while the erythropoietin receptor does not.
B) Both the insulin and erythropoietin receptors trigger MAPK cascades.
C) The insulin receptor contains a tyrosine kinase, while the erythropoetin receptor does not.
D) The insulin receptor is phosphorylated in response to signal molecule binding, while the erythropoietin receptor does not.