Glycoprotein molecules
A) act as receptors on the surface of cell membranes.
B) function as cell markers.
C) are present in the secretions coating the respiratory tract.
D) function as hormones from the pancreas.
E) act as receptors on the surface of cell membranes and function as cell markers.

Question

Quizplus · Accepted Answer

Glycoprotein molecules are proteins that are modified with carbohydrate groups. They act as receptors on the surface of cell membranes by binding to specific molecules, and they also function as cell markers to identify self from non-self cells. Therefore, both choices E would be the best answer. Glycoproteins are not typically involved in the secretion of the respiratory tract or the function of hormones from the pancreas.

Glycoprotein Molecules