Signaling receptors are usually marked for endocytosis and subsequent destruction by the covalent attachment of a "tag" to the cytoplasmic tail of the receptor while it resides at the cell surface.What is the name of the "tag"?
A)ubiquitin
B)transferrin
C)opsonin
D)chaperonin
E)complexin

Question

Quizplus · Accepted Answer

The "tag" that is covalently attached to the cytoplasmic tail of signaling receptors to mark them for endocytosis and subsequent destruction is called ubiquitin.

Signaling Receptors Are Usually Marked for Endocytosis and Subsequent Destruction