Protein X contains four transmembrane domains,a short N-terminus and a long C-terminus.Following protein synthesis,the N-terminus of the protein faces the lumen (the inside)of the ER.After protein X is transported to the cell surface via exocytosis,you would expect the N-terminus of protein X to be
A)extracellular.
B)cytoplasmic.
C)in the lumen.
D)in the lipid bilayer of the plasma membrane.

Question

Quizplus · Accepted Answer

Since protein X is transported to the cell surface via exocytosis, the N-terminus will be oriented towards the extracellular space.

Protein X Contains Four Transmembrane Domains,a Short N-Terminus and a Long