a plasma membrane protein begins with a large hydrophilic regulatory domain. this is followed by six hydrophobic regions of 20 amino acids, with short hydrophilic regions in between. finally, a large hydrophilic domain, called domain a, is at the end of the polypeptide. the first signaling sequence of this protein is an n-terminal signal sequence. if all six hydrophobic domains cross the membrane one time each, then it is possible that
the regulatory domain and domain A will be on the same side of the membrane
the regulatory domain and domain A will both be intracelluar
the regulatory domain and domain A are transmembrane domains
the regulatory domain is intracellular and domain A is extracellular
Choices A and B are both possible