All members of the steroid hormone receptor family __________________. (a) are cell-surface ...

Choice (d) is correct. All members of the steroid hormone receptor family are intracellular proteins thus choice (a) is not correct that interact with signal molecules that can diffuse through the plasma membrane. Once activated, steroid hormone receptors regulate gene transcription in the nucleus choice (c). The binding of the signal molecule induces a large conformational change in the receptor protein choice (b). This conformational change activates the steroid hormone receptors, allowing them to promote or inhibit the transcription of the appropriate genes.