Cells of the Pancreas Will Incorporate Radioactively Labeled Amino Acids

Multiple Choice

Cells of the pancreas will incorporate radioactively labeled amino acids into proteins. This "tagging" of newly synthesized proteins enables a researcher to track their location. In this case, we are tracking an enzyme secreted by pancreatic cells. What is its most likely pathway?

A) ER → Golgi → nucleus
B) Golgi → ER → lysosome
C) nucleus → ER → Golgi
D) ER → Golgi → vesicles that fuse with plasma membrane
E) ER → lysosomes → vesicles that fuse with plasma membrane