The Brassinosteroid Receptor Differs from the Receptors for Auxin, Gibberellin

The brassinosteroid receptor differs from the receptors for auxin, gibberellin, ethylene and cytokinins in that the brassinosteroid receptor:

A) is located entirely in the endoplasmic reticulum.
B) has an extracellular region, a transmembrane region, and a cytoplasmic region.
C) is located entirely in the cytoplasm.
D) does not initiate a signaling cascade.
E) binds directly with genes in the nucleus.